[dart] Add new analysis rules

Added unnecessary_const and unnecessary_new and update our code to build
with that.

FIDL-574 #done

Change-Id: I7a0dc1328c61f3ddc734a04025219dddddae59e9
diff --git a/app/spinning_cube/lib/main.dart b/app/spinning_cube/lib/main.dart
index 8a6e346..35f4a72 100644
--- a/app/spinning_cube/lib/main.dart
+++ b/app/spinning_cube/lib/main.dart
@@ -15,7 +15,7 @@
   Ticker createTicker(TickerCallback onTick) => Ticker(onTick);
 }
 
-const Duration _kCubeRotationAnimationPeriod = const Duration(
+const Duration _kCubeRotationAnimationPeriod = Duration(
   milliseconds: 12000,
 );
 
diff --git a/bin/bluetooth_settings/lib/main.dart b/bin/bluetooth_settings/lib/main.dart
index 6d6c8d4..c9565b8 100644
--- a/bin/bluetooth_settings/lib/main.dart
+++ b/bin/bluetooth_settings/lib/main.dart
@@ -13,11 +13,11 @@
 void main() {
   setupLogger();
 
-  Widget app = new MaterialApp(
-    home: new Container(
-      child: new ScopedModel<BluetoothSettingsModel>(
-        model: new BluetoothSettingsModel(),
-        child: const BluetoothSettings(),
+  Widget app = MaterialApp(
+    home: Container(
+      child: ScopedModel<BluetoothSettingsModel>(
+        model: BluetoothSettingsModel(),
+        child: BluetoothSettings(),
       ),
     ),
   );
diff --git a/bin/bluetooth_settings/lib/src/bluetooth_model.dart b/bin/bluetooth_settings/lib/src/bluetooth_model.dart
index 74db363..8b739f9 100644
--- a/bin/bluetooth_settings/lib/src/bluetooth_model.dart
+++ b/bin/bluetooth_settings/lib/src/bluetooth_model.dart
@@ -14,7 +14,7 @@
 /// Model containing state needed for the bluetooth settings app.
 class BluetoothSettingsModel extends Model {
   /// Bluetooth controller proxy.
-  final ControlProxy _control = new ControlProxy();
+  final ControlProxy _control = ControlProxy();
   final BluetoothSettingsPairingDelegate _pairingDelegate =
       BluetoothSettingsPairingDelegate();
 
diff --git a/bin/bluetooth_settings/lib/src/bluetooth_settings.dart b/bin/bluetooth_settings/lib/src/bluetooth_settings.dart
index 0440c20..819150c 100644
--- a/bin/bluetooth_settings/lib/src/bluetooth_settings.dart
+++ b/bin/bluetooth_settings/lib/src/bluetooth_settings.dart
@@ -17,13 +17,13 @@
 
   @override
   Widget build(BuildContext context) =>
-      new ScopedModelDescendant<BluetoothSettingsModel>(
+      ScopedModelDescendant<BluetoothSettingsModel>(
           builder: (
         BuildContext context,
         Widget child,
         BluetoothSettingsModel model,
       ) =>
-              new LayoutBuilder(
+              LayoutBuilder(
                   builder: (BuildContext context, BoxConstraints constraints) =>
                       Material(
                           child: _buildBluetoothSettings(
diff --git a/bin/crasher_dart/lib/main.dart b/bin/crasher_dart/lib/main.dart
index 047f1f0..586b1be 100644
--- a/bin/crasher_dart/lib/main.dart
+++ b/bin/crasher_dart/lib/main.dart
@@ -29,9 +29,9 @@
 
 Future<void> throwAsync() async {
   Future.delayed(Duration(seconds: 1),
-      () => throw new Exception('Dart exception from async function'));
+      () => throw Exception('Dart exception from async function'));
 }
 
 void throwSync() {
-  throw new Exception('Dart exception from sync function');
+  throw Exception('Dart exception from sync function');
 }
diff --git a/bin/device_settings/lib/main.dart b/bin/device_settings/lib/main.dart
index f579b16..f04dfd8 100644
--- a/bin/device_settings/lib/main.dart
+++ b/bin/device_settings/lib/main.dart
@@ -19,7 +19,7 @@
     home: Container(
       child: ProviderNode(
         providers: providers,
-        child: const DeviceSettings(),
+        child: DeviceSettings(),
       ),
     ),
   );
diff --git a/bin/display_settings/lib/main.dart b/bin/display_settings/lib/main.dart
index 95759b2..443f726 100644
--- a/bin/display_settings/lib/main.dart
+++ b/bin/display_settings/lib/main.dart
@@ -13,11 +13,11 @@
   final Display display = Display();
   setupLogger();
 
-  Widget app = new MaterialApp(
-    home: new Container(
-      child: new ScopedModel<DisplayPolicyBrightnessModel>(
-        model: new DisplayPolicyBrightnessModel(display),
-        child: const DisplaySettings(),
+  Widget app = MaterialApp(
+    home: Container(
+      child: ScopedModel<DisplayPolicyBrightnessModel>(
+        model: DisplayPolicyBrightnessModel(display),
+        child: DisplaySettings(),
       ),
     ),
   );
diff --git a/bin/display_settings/lib/src/widget.dart b/bin/display_settings/lib/src/widget.dart
index ceb48dd..53f789d 100644
--- a/bin/display_settings/lib/src/widget.dart
+++ b/bin/display_settings/lib/src/widget.dart
@@ -18,7 +18,7 @@
   return SettingsSection(
       title: 'Brightness',
       scale: scale,
-      child: new Slider(
+      child: Slider(
         activeColor: Colors.grey[600],
         inactiveColor: Colors.grey[200],
         value: model.brightness,
@@ -35,13 +35,13 @@
 
   @override
   Widget build(BuildContext context) =>
-      new ScopedModelDescendant<DisplayPolicyBrightnessModel>(
+      ScopedModelDescendant<DisplayPolicyBrightnessModel>(
           builder: (
         BuildContext context,
         Widget child,
         DisplayPolicyBrightnessModel model,
       ) =>
-              new LayoutBuilder(
+              LayoutBuilder(
                   builder: (BuildContext context, BoxConstraints constraints) =>
                       Material(
                           child: _buildDisplaySettings(
diff --git a/bin/fidl_bindings_test/test/test/clone_test.dart b/bin/fidl_bindings_test/test/test/clone_test.dart
index 0ae70e7..a56f787 100644
--- a/bin/fidl_bindings_test/test/test/clone_test.dart
+++ b/bin/fidl_bindings_test/test/test/clone_test.dart
@@ -26,13 +26,13 @@
     });
     test('set field', () {
       final s1 = ExampleStruct(foo: 'test', bar: 42);
-      final s2 = ExampleStruct.clone(s1, baz: new Uint8List(10));
+      final s2 = ExampleStruct.clone(s1, baz: Uint8List(10));
       expect(s2.foo, equals('test'));
       expect(s2.bar, equals(42));
       expect(s2.baz?.length, equals(10));
     });
     test('unset field', () {
-      final s1 = ExampleStruct(foo: 'test', bar: 42, baz: new Uint8List(10));
+      final s1 = ExampleStruct(foo: 'test', bar: 42, baz: Uint8List(10));
       final s2 = ExampleStruct.cloneWithout(s1, baz: true);
       expect(s2.foo, equals('test'));
       expect(s2.bar, equals(42));
diff --git a/bin/fidl_bindings_test/test/test/event_test.dart b/bin/fidl_bindings_test/test/test/event_test.dart
index 43319c9..71918d7 100644
--- a/bin/fidl_bindings_test/test/test/event_test.dart
+++ b/bin/fidl_bindings_test/test/test/event_test.dart
@@ -13,7 +13,7 @@
 
   group('events', () {
     setUpAll(() async {
-      server = new TestServerInstance();
+      server = TestServerInstance();
       await server.start();
     });
 
@@ -35,9 +35,9 @@
 
     test('three args', () async {
       final primes =
-          new Uint8List.fromList([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]);
+          Uint8List.fromList([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]);
       await server.proxy.sendThreeArgEvent(
-          23, 42, new NoHandleStruct(foo: 'hello', bar: 1729, baz: primes));
+          23, 42, NoHandleStruct(foo: 'hello', bar: 1729, baz: primes));
       final threeReply = await server.proxy.threeArgEvent.first;
       expect(threeReply.x, equals(23));
       expect(threeReply.y, equals(42));
diff --git a/bin/fidl_bindings_test/test/test/failure_test.dart b/bin/fidl_bindings_test/test/test/failure_test.dart
index ded0327..f8360fda 100644
--- a/bin/fidl_bindings_test/test/test/failure_test.dart
+++ b/bin/fidl_bindings_test/test/test/failure_test.dart
@@ -15,7 +15,7 @@
   TestServerInstance server;
   group('failure', () {
     setUp(() async {
-      server = new TestServerInstance();
+      server = TestServerInstance();
       await server.start();
     });
 
@@ -62,7 +62,7 @@
     });
 
     test('binding closes immediately after sending response', () async {
-      var impl = new SimpleServerImpl();
+      var impl = SimpleServerImpl();
       var proxy = impl.newAsyncProxy();
       var pinged = false;
 
@@ -78,15 +78,15 @@
 
   group('unbound', () {
     test('one-way call on unbound proxy', () {
-      final proxy = new TestServerProxy();
+      final proxy = TestServerProxy();
       expect(proxy.oneWayNoArgs(), throwsA(anything));
     });
     test('two-way call on unbound proxy', () {
-      final proxy = new TestServerProxy();
+      final proxy = TestServerProxy();
       expect(proxy.twoWayNoArgs(), throwsA(anything));
     });
     test('event listen on unbound proxy', () {
-      final proxy = new TestServerProxy();
+      final proxy = TestServerProxy();
       expect(proxy.emptyEvent.first, doesNotComplete);
     });
   });
@@ -97,7 +97,7 @@
 // close the bound channel.
 class SimpleServerImpl extends fidlgen.SimpleServer {
   SimpleServerProxy newAsyncProxy() {
-    var proxy = new SimpleServerProxy();
+    var proxy = SimpleServerProxy();
     binding.bind(
         this,
         InterfaceRequest<fidlgen.SimpleServer>(
@@ -111,5 +111,5 @@
     binding.close();
   }
 
-  fidlgen.SimpleServerBinding binding = new fidlgen.SimpleServerBinding();
+  fidlgen.SimpleServerBinding binding = fidlgen.SimpleServerBinding();
 }
diff --git a/bin/fidl_bindings_test/test/test/hash_test.dart b/bin/fidl_bindings_test/test/test/hash_test.dart
index 6186c24..f029689 100644
--- a/bin/fidl_bindings_test/test/test/hash_test.dart
+++ b/bin/fidl_bindings_test/test/test/hash_test.dart
@@ -30,13 +30,13 @@
     group('structs', () {
       test('no handles', () {
         final s1 = NoHandleStruct(
-            foo: 'hello', bar: 42, baz: new Uint8List.fromList([2, 4, 6, 8]));
+            foo: 'hello', bar: 42, baz: Uint8List.fromList([2, 4, 6, 8]));
         final s2 = NoHandleStruct(
-            foo: 'hello', bar: 42, baz: new Uint8List.fromList([2, 4, 6, 8]));
+            foo: 'hello', bar: 42, baz: Uint8List.fromList([2, 4, 6, 8]));
         final s3 = NoHandleStruct(
-            foo: 'goodbye', bar: 42, baz: new Uint8List.fromList([2, 4, 6, 8]));
+            foo: 'goodbye', bar: 42, baz: Uint8List.fromList([2, 4, 6, 8]));
         final s4 = NoHandleStruct(
-            foo: 'hello', bar: 42, baz: new Uint8List.fromList([3, 6, 9, 12]));
+            foo: 'hello', bar: 42, baz: Uint8List.fromList([3, 6, 9, 12]));
         expect(s1 == s2, isTrue);
         expect(s1 == s3, isFalse);
         expect(s1 == s4, isFalse);
diff --git a/bin/fidl_bindings_test/test/test/oneway_test.dart b/bin/fidl_bindings_test/test/test/oneway_test.dart
index d13df18..7ce68ed 100644
--- a/bin/fidl_bindings_test/test/test/oneway_test.dart
+++ b/bin/fidl_bindings_test/test/test/oneway_test.dart
@@ -13,7 +13,7 @@
 
   group('one way', () {
     setUpAll(() async {
-      server = new TestServerInstance();
+      server = TestServerInstance();
       await server.start();
     });
 
@@ -36,9 +36,9 @@
 
     test('three args', () async {
       final primes =
-          new Uint8List.fromList([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]);
+          Uint8List.fromList([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]);
       await server.proxy.oneWayThreeArgs(
-          23, 42, new NoHandleStruct(foo: 'hello', bar: 1729, baz: primes));
+          23, 42, NoHandleStruct(foo: 'hello', bar: 1729, baz: primes));
       final threeReply = await server.proxy.receivedOneWayThreeArgs();
       expect(threeReply.x, equals(23));
       expect(threeReply.y, equals(42));
@@ -49,9 +49,9 @@
 
     test('table', () async {
       final primes =
-          new Uint8List.fromList([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]);
+          Uint8List.fromList([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]);
       await server.proxy.oneWayExampleTable(
-          new ExampleTable(foo: 'hello', bar: 1729, baz: primes));
+          ExampleTable(foo: 'hello', bar: 1729, baz: primes));
       final received = await server.proxy.receivedOneWayExampleTable();
       expect(received.foo, equals('hello'));
       expect(received.bar, equals(1729));
@@ -60,7 +60,7 @@
 
     test('partial table', () async {
       await server.proxy.oneWayExampleTable(
-          new ExampleTable(bar: 1729)); // not seting foo, nor baz
+          ExampleTable(bar: 1729)); // not seting foo, nor baz
       final received = await server.proxy.receivedOneWayExampleTable();
       expect(received.foo, equals(null));
       expect(received.bar, equals(1729));
@@ -69,7 +69,7 @@
 
     test('empty table', () async {
       await server.proxy.oneWayExampleTable(
-          new ExampleTable());
+          ExampleTable());
       final received = await server.proxy.receivedOneWayExampleTable();
       expect(received.foo, equals(null));
       expect(received.bar, equals(null));
@@ -96,7 +96,7 @@
 
     test('xunion with vector of bytes', () async {
       final primes =
-          new Uint8List.fromList([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]);
+          Uint8List.fromList([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]);
       await server.proxy.oneWayExampleXunion(
         ExampleXunion.withBaz(primes));
       final received = await server.proxy.receivedOneWayExampleXunion();
diff --git a/bin/fidl_bindings_test/test/test/roundtrip_test.dart b/bin/fidl_bindings_test/test/test/roundtrip_test.dart
index 4e3706f..e4d0ce5 100644
--- a/bin/fidl_bindings_test/test/test/roundtrip_test.dart
+++ b/bin/fidl_bindings_test/test/test/roundtrip_test.dart
@@ -17,7 +17,7 @@
 
   static void run<T>(String name, T input, $fidl.FidlType<T> type, Uint8List bytes) {
     group(name, () {
-      new SuccessCase(input, type, bytes)
+      SuccessCase(input, type, bytes)
         .._checkEncode()
         .._checkDecode();
     });
@@ -25,18 +25,18 @@
 
   void _checkEncode() {
     test('encode', () {
-      final $fidl.Encoder $encoder = new $fidl.Encoder()
+      final $fidl.Encoder $encoder = $fidl.Encoder()
         ..alloc(type.encodedSize);
       type.encode($encoder, input, 0);
       final message = $encoder.message;
-      expect(new Uint8List.view(message.data.buffer, 0, message.dataLength), equals(bytes));
+      expect(Uint8List.view(message.data.buffer, 0, message.dataLength), equals(bytes));
     });
   }
 
   void _checkDecode() {
     test('decode', () {
-      final $fidl.Decoder $decoder = new $fidl.Decoder(
-        new $fidl.Message(new ByteData.view(bytes.buffer, 0, bytes.length), [], bytes.length, 0))
+      final $fidl.Decoder $decoder = $fidl.Decoder(
+        $fidl.Message(ByteData.view(bytes.buffer, 0, bytes.length), [], bytes.length, 0))
           ..claimMemory(type.encodedSize);
         final $actual = type.decode($decoder, 0);
         expect($actual, equals(input));
@@ -66,7 +66,7 @@
 
     SuccessCase.run('simpletable-x-and-y',
       TestSimpleTable(
-        table: new SimpleTable(x: 42, y: 67),
+        table: SimpleTable(x: 42, y: 67),
       ),
       kTestSimpleTable_Type,
       Uint8List.fromList([
@@ -89,7 +89,7 @@
 
     SuccessCase.run('simpletable-just-y',
       TestSimpleTable(
-        table: new SimpleTable(y: 67),
+        table: SimpleTable(y: 67),
       ),
       kTestSimpleTable_Type,
       Uint8List.fromList([
@@ -111,7 +111,7 @@
 
     SuccessCase.run('table-with-string-and-vector-1',
       TestTableWithStringAndVector(
-        table: new TableWithStringAndVector(
+        table: TableWithStringAndVector(
           foo: 'hello',
           bar: 27,
         ),
@@ -132,7 +132,7 @@
     );
 
     SuccessCase.run('empty-table',
-      TestSimpleTable(table: new SimpleTable()),
+      TestSimpleTable(table: SimpleTable()),
       kTestSimpleTable_Type,
       Uint8List.fromList([
         0, 0, 0, 0, 0, 0, 0, 0, // max ordinal
@@ -225,7 +225,7 @@
 
     SuccessCase.run('xunion-in-table-xunion-absent',
       TestXUnionInTable(
-        value: new XUnionInTable(
+        value: XUnionInTable(
           before: 'before',
           after: 'after',
         )
@@ -265,7 +265,7 @@
 
     SuccessCase.run('xunion-in-table-xunion-present',
       TestXUnionInTable(
-        value: new XUnionInTable(
+        value: XUnionInTable(
           before: 'before',
           xu: SampleXUnion.withU(0xdeadbeef),
           after: 'after',
diff --git a/bin/fidl_bindings_test/test/test/state_test.dart b/bin/fidl_bindings_test/test/test/state_test.dart
index 9062d8c..49be67e 100644
--- a/bin/fidl_bindings_test/test/test/state_test.dart
+++ b/bin/fidl_bindings_test/test/test/state_test.dart
@@ -10,12 +10,12 @@
 void main() async {
   group('proxy state', () {
     test('initial', () {
-      final proxy = new TestServerProxy();
+      final proxy = TestServerProxy();
       expect(proxy.ctrl.state, equals(InterfaceState.unbound));
     });
 
     test('request', () {
-      final proxy = new TestServerProxy();
+      final proxy = TestServerProxy();
       expect(proxy.ctrl.whenBound, completes);
       final request = proxy.ctrl.request();
       expect(proxy.ctrl.state, equals(InterfaceState.bound));
@@ -23,8 +23,8 @@
     });
 
     test('bind', () {
-      final pair = new InterfacePair<TestServer>();
-      final proxy = new TestServerProxy();
+      final pair = InterfacePair<TestServer>();
+      final proxy = TestServerProxy();
       expect(proxy.ctrl.whenBound, completes);
       proxy.ctrl.bind(pair.handle);
       expect(proxy.ctrl.state, equals(InterfaceState.bound));
@@ -33,12 +33,12 @@
 
     test('after bind', () {
       // Set up a bound proxy...
-      var pair = new InterfacePair<TestServer>();
-      final proxy = new TestServerProxy();
+      var pair = InterfacePair<TestServer>();
+      final proxy = TestServerProxy();
       proxy.ctrl.bind(pair.handle);
 
       // The bound proxy cannot be bound to a handle.
-      pair = new InterfacePair<TestServer>();
+      pair = InterfacePair<TestServer>();
       expect(() => proxy.ctrl.bind(pair.handle), throwsA(anything));
       // The bound proxy cannot vend an interface request.
       expect(proxy.ctrl.request, throwsA(anything));
@@ -47,8 +47,8 @@
     test('unbind', () {
       // Set up a bound proxy...
 
-      final pair = new InterfacePair<TestServer>();
-      final proxy = new TestServerProxy();
+      final pair = InterfacePair<TestServer>();
+      final proxy = TestServerProxy();
       proxy.ctrl.bind(pair.handle);
 
       expect(proxy.ctrl.whenClosed, completes);
@@ -60,8 +60,8 @@
 
     test('close', () {
       // Set up a bound proxy...
-      final pair = new InterfacePair<TestServer>();
-      final proxy = new TestServerProxy();
+      final pair = InterfacePair<TestServer>();
+      final proxy = TestServerProxy();
       proxy.ctrl.bind(pair.handle);
 
       expect(proxy.ctrl.whenClosed, completes);
@@ -73,15 +73,15 @@
 
     test('after close', () {
       // Set up a closed proxy...
-      var pair = new InterfacePair<TestServer>();
-      final proxy = new TestServerProxy();
+      var pair = InterfacePair<TestServer>();
+      final proxy = TestServerProxy();
       proxy.ctrl.bind(pair.handle);
       proxy.ctrl.close();
 
       // The closed proxy will never reach bound state.
       expect(proxy.ctrl.whenBound, throwsA(anything));
       // The closed proxy cannot be bound to a handle.
-      pair = new InterfacePair<TestServer>();
+      pair = InterfacePair<TestServer>();
       expect(() => proxy.ctrl.bind(pair.handle), throwsA(anything));
       // The closed proxy cannot vend an interface request.
       expect(proxy.ctrl.request, throwsA(anything));
diff --git a/bin/fidl_bindings_test/test/test/twoway_test.dart b/bin/fidl_bindings_test/test/test/twoway_test.dart
index caf6f8f..4853787 100644
--- a/bin/fidl_bindings_test/test/test/twoway_test.dart
+++ b/bin/fidl_bindings_test/test/test/twoway_test.dart
@@ -12,7 +12,7 @@
   TestServerInstance server;
   group('two way', () {
     setUpAll(() async {
-      server = new TestServerInstance();
+      server = TestServerInstance();
       await server.start();
     });
 
@@ -32,10 +32,10 @@
 
     test('three args', () async {
       final primes =
-          new Uint8List.fromList([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]);
+          Uint8List.fromList([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]);
 
       final threeReply = await server.proxy.twoWayThreeArgs(
-          23, 42, new NoHandleStruct(foo: 'hello', bar: 1729, baz: primes));
+          23, 42, NoHandleStruct(foo: 'hello', bar: 1729, baz: primes));
 
       expect(threeReply.x, equals(23));
       expect(threeReply.y, equals(42));
diff --git a/bin/fidlgen_dart/backend/ir/ir.go b/bin/fidlgen_dart/backend/ir/ir.go
index 1655c88..1f9e295 100644
--- a/bin/fidlgen_dart/backend/ir/ir.go
+++ b/bin/fidlgen_dart/backend/ir/ir.go
@@ -364,12 +364,12 @@
 		lines = append(lines, fmt.Sprintf("      %s,\n", p.typeExpr))
 	}
 
-	return fmt.Sprintf("const <$fidl.MemberType>[\n%s    ]", strings.Join(lines, ""))
+	return fmt.Sprintf("<$fidl.MemberType>[\n%s    ]", strings.Join(lines, ""))
 }
 
 func formatStructMemberList(members []StructMember) string {
 	if len(members) == 0 {
-		return "const <$fidl.MemberType>[]"
+		return "<$fidl.MemberType>[]"
 	}
 
 	lines := []string{}
@@ -378,12 +378,12 @@
 		lines = append(lines, fmt.Sprintf("    %s,\n", v.typeExpr))
 	}
 
-	return fmt.Sprintf("const <$fidl.MemberType>[\n%s  ]", strings.Join(lines, ""))
+	return fmt.Sprintf("<$fidl.MemberType>[\n%s  ]", strings.Join(lines, ""))
 }
 
 func formatTableMemberList(members []TableMember) string {
 	if len(members) == 0 {
-		return "const <int, $fidl.FidlType>{}"
+		return "<int, $fidl.FidlType>{}"
 	}
 
 	lines := []string{}
@@ -392,12 +392,12 @@
 		lines = append(lines, fmt.Sprintf("    %d: %s,\n", v.Ordinal, v.Type.typeExpr))
 	}
 
-	return fmt.Sprintf("const <int, $fidl.FidlType>{\n%s  }", strings.Join(lines, ""))
+	return fmt.Sprintf("<int, $fidl.FidlType>{\n%s  }", strings.Join(lines, ""))
 }
 
 func formatUnionMemberList(members []UnionMember) string {
 	if len(members) == 0 {
-		return "const <$fidl.MemberType>[]"
+		return "<$fidl.MemberType>[]"
 	}
 
 	lines := []string{}
@@ -406,12 +406,12 @@
 		lines = append(lines, fmt.Sprintf("    %s,\n", v.typeExpr))
 	}
 
-	return fmt.Sprintf("const <$fidl.MemberType>[\n%s  ]", strings.Join(lines, ""))
+	return fmt.Sprintf("<$fidl.MemberType>[\n%s  ]", strings.Join(lines, ""))
 }
 
 func formatXUnionMemberList(members []XUnionMember) string {
 	if len(members) == 0 {
-		return "const <int, $fidl.FidlType>{}"
+		return "<int, $fidl.FidlType>{}"
 	}
 
 	var lines []string
@@ -419,7 +419,7 @@
 		lines = append(lines, fmt.Sprintf("    %d: %s,\n", v.Ordinal, v.Type.typeExpr))
 	}
 
-	return fmt.Sprintf("const <int, $fidl.FidlType>{\n%s  }", strings.Join(lines, ""))
+	return fmt.Sprintf("<int, $fidl.FidlType>{\n%s  }", strings.Join(lines, ""))
 }
 
 func formatLibraryName(library types.LibraryIdentifier) string {
@@ -431,7 +431,7 @@
 }
 
 func typeExprForMethod(request []Parameter, response []Parameter, name string) string {
-	return fmt.Sprintf(`const $fidl.MethodType(
+	return fmt.Sprintf(`$fidl.MethodType(
     request: %s,
 	response: %s,
 	name: r"%s",
@@ -443,7 +443,7 @@
 	if !ok {
 		log.Fatal("Unknown primitive subtype: ", val)
 	}
-	return fmt.Sprintf("const $fidl.%s()", t)
+	return fmt.Sprintf("$fidl.%s()", t)
 }
 
 func libraryPrefix(library types.LibraryIdentifier) string {
@@ -594,7 +594,7 @@
 		}
 		elementStr := fmt.Sprintf("element: %s", t.typeExpr)
 		elementCountStr := fmt.Sprintf("elementCount: %s", formatInt(val.ElementCount))
-		r.typeExpr = fmt.Sprintf("const $fidl.ArrayType<%s>(%s, %s)", r.Decl, elementStr, elementCountStr)
+		r.typeExpr = fmt.Sprintf("$fidl.ArrayType<%s>(%s, %s)", r.Decl, elementStr, elementCountStr)
 	case types.VectorType:
 		t := c.compileType(*val.ElementType)
 		if len(t.typedDataDecl) > 0 {
@@ -609,13 +609,13 @@
 		elementStr := fmt.Sprintf("element: %s", t.typeExpr)
 		maybeElementCountStr := fmt.Sprintf("maybeElementCount: %s", formatInt(val.ElementCount))
 		nullableStr := fmt.Sprintf("nullable: %s", formatBool(val.Nullable))
-		r.typeExpr = fmt.Sprintf("const $fidl.VectorType<%s>(%s, %s, %s)",
+		r.typeExpr = fmt.Sprintf("$fidl.VectorType<%s>(%s, %s, %s)",
 			r.Decl, elementStr, maybeElementCountStr, nullableStr)
 	case types.StringType:
 		r.Decl = "String"
 		r.SyncDecl = r.Decl
 		r.AsyncDecl = r.Decl
-		r.typeExpr = fmt.Sprintf("const $fidl.StringType(maybeElementCount: %s, nullable: %s)",
+		r.typeExpr = fmt.Sprintf("$fidl.StringType(maybeElementCount: %s, nullable: %s)",
 			formatInt(val.ElementCount), formatBool(val.Nullable))
 	case types.HandleType:
 		switch val.HandleSubtype {
@@ -632,7 +632,7 @@
 		}
 		r.SyncDecl = r.Decl
 		r.AsyncDecl = r.Decl
-		r.typeExpr = fmt.Sprintf("const $fidl.%sType(nullable: %s)",
+		r.typeExpr = fmt.Sprintf("$fidl.%sType(nullable: %s)",
 			r.Decl, formatBool(val.Nullable))
 	case types.RequestType:
 		compound := types.ParseCompoundIdentifier(val.RequestSubtype)
@@ -644,7 +644,7 @@
 			r.SyncDecl = fmt.Sprintf("$fidl.InterfaceRequest<$sync.%s>", t)
 		}
 		r.AsyncDecl = r.Decl
-		r.typeExpr = fmt.Sprintf("const $fidl.InterfaceRequestType<%s>(nullable: %s)",
+		r.typeExpr = fmt.Sprintf("$fidl.InterfaceRequestType<%s>(nullable: %s)",
 			t, formatBool(val.Nullable))
 	case types.PrimitiveType:
 		r.Decl = c.compilePrimitiveSubtype(val.PrimitiveSubtype)
@@ -682,7 +682,7 @@
 			r.AsyncDecl = r.SyncDecl
 			if val.Nullable {
 				if r.declType != types.XUnionDeclType {
-					r.typeExpr = fmt.Sprintf("const $fidl.PointerType<%s>(element: %s)",
+					r.typeExpr = fmt.Sprintf("$fidl.PointerType<%s>(element: %s)",
 						t, c.typeSymbolForCompoundIdentifier(types.ParseCompoundIdentifier(val.Identifier)))
 				} else {
 					r.typeExpr = c.optTypeSymbolForCompoundIdentifier(types.ParseCompoundIdentifier(val.Identifier))
@@ -699,7 +699,7 @@
 				r.SyncDecl = fmt.Sprintf("$fidl.InterfaceHandle<$sync.%s>", t)
 			}
 			r.AsyncDecl = r.Decl
-			r.typeExpr = fmt.Sprintf("const $fidl.InterfaceHandleType<%s>(nullable: %s)",
+			r.typeExpr = fmt.Sprintf("$fidl.InterfaceHandleType<%s>(nullable: %s)",
 				t, formatBool(val.Nullable))
 		default:
 			log.Fatal("Unknown declaration type: ", r.declType)
@@ -736,7 +736,7 @@
 		n,
 		[]EnumMember{},
 		c.typeSymbolForCompoundIdentifier(ci),
-		fmt.Sprintf("const $fidl.EnumType<%s>(type: %s, ctor: %s._ctor)", n, typeExprForPrimitiveSubtype(val.Type), n),
+		fmt.Sprintf("$fidl.EnumType<%s>(type: %s, ctor: %s._ctor)", n, typeExprForPrimitiveSubtype(val.Type), n),
 		docString(val),
 	}
 	for _, v := range val.Members {
@@ -767,7 +767,7 @@
 		Name:     name,
 		Offset:   offset,
 		Convert:  convert,
-		typeExpr: fmt.Sprintf("const $fidl.MemberType<%s>(%s, %s)", t.Decl, typeStr, offsetStr),
+		typeExpr: fmt.Sprintf("$fidl.MemberType<%s>(%s, %s)", t.Decl, typeStr, offsetStr),
 	}
 }
 
@@ -936,7 +936,7 @@
 		c.compileLowerCamelIdentifier(val.Name),
 		defaultValue,
 		val.Offset,
-		fmt.Sprintf("const $fidl.MemberType<%s>(%s, %s)", t.Decl, typeStr, offsetStr),
+		fmt.Sprintf("$fidl.MemberType<%s>(%s, %s)", t.Decl, typeStr, offsetStr),
 		docString(val),
 	}
 }
@@ -970,7 +970,7 @@
 
 	r.HasNullableField = hasNullableField
 
-	r.TypeExpr = fmt.Sprintf(`const $fidl.StructType<%s>(
+	r.TypeExpr = fmt.Sprintf(`$fidl.StructType<%s>(
   encodedSize: %v,
   members: %s,
   ctor: %s._ctor,
@@ -1009,7 +1009,7 @@
 		}
 	}
 
-	r.TypeExpr = fmt.Sprintf(`const $fidl.TableType<%s>(
+	r.TypeExpr = fmt.Sprintf(`$fidl.TableType<%s>(
   encodedSize: %v,
   members: %s,
   ctor: %s._ctor,
@@ -1026,7 +1026,7 @@
 		c.compileLowerCamelIdentifier(val.Name),
 		c.compileUpperCamelIdentifier(val.Name),
 		val.Offset,
-		fmt.Sprintf("const $fidl.MemberType<%s>(%s, %s)", t.Decl, typeStr, offsetStr),
+		fmt.Sprintf("$fidl.MemberType<%s>(%s, %s)", t.Decl, typeStr, offsetStr),
 		docString(val),
 	}
 }
@@ -1046,7 +1046,7 @@
 		r.Members = append(r.Members, c.compileUnionMember(v))
 	}
 
-	r.TypeExpr = fmt.Sprintf(`const $fidl.UnionType<%s>(
+	r.TypeExpr = fmt.Sprintf(`$fidl.UnionType<%s>(
   encodedSize: %v,
   members: %s,
   ctor: %s._ctor,
@@ -1077,12 +1077,12 @@
 		Members:       members,
 		Documented:    docString(val),
 	}
-	r.TypeExpr = fmt.Sprintf(`const $fidl.XUnionType<%s>(
+	r.TypeExpr = fmt.Sprintf(`$fidl.XUnionType<%s>(
   encodedSize: %v,
   members: %s,
   ctor: %s._ctor,
 )`, r.Name, val.Size, formatXUnionMemberList(r.Members), r.Name)
-	r.OptTypeExpr = fmt.Sprintf(`const $fidl.XUnionType<%s>(
+	r.OptTypeExpr = fmt.Sprintf(`$fidl.XUnionType<%s>(
 encodedSize: %v,
 members: %s,
 ctor: %s._ctor,
diff --git a/bin/fidlgen_dart/backend/templates/enum.tmpl.go b/bin/fidlgen_dart/backend/templates/enum.tmpl.go
index dfe7c50..68cdc12 100644
--- a/bin/fidlgen_dart/backend/templates/enum.tmpl.go
+++ b/bin/fidlgen_dart/backend/templates/enum.tmpl.go
@@ -26,7 +26,7 @@
   {{- range .Doc }}
   ///{{ . -}}
   {{- end }}
-  static const {{ $.Name }} {{ .Name }} = const {{ $.Name }}._({{ .Value }});
+  static const {{ $.Name }} {{ .Name }} = {{ $.Name }}._({{ .Value }});
 {{- end }}
 
   const {{ .Name }}._(this.value);
@@ -34,13 +34,13 @@
   @override
   final int value;
 
-  static const Map<String, {{ .Name }}> valuesMap = const {
+  static const Map<String, {{ .Name }}> valuesMap = {
   {{- range .Members }}
     r'{{ .Name }}': {{ .Name }},
   {{- end }}
   };
 
-  static const List<{{ .Name }}> values = const [
+  static const List<{{ .Name }}> values = [
     {{- range .Members }}
     {{ .Name }},
     {{- end }}
@@ -60,7 +60,7 @@
     }
   }
 
-  static {{ .Name }} _ctor(int v) => new {{ .Name }}(v);
+  static {{ .Name }} _ctor(int v) => {{ .Name }}(v);
 }
 
 const $fidl.EnumType<{{ .Name }}> {{ .TypeSymbol }} = {{ .TypeExpr }};
diff --git a/bin/fidlgen_dart/backend/templates/interface.tmpl.go b/bin/fidlgen_dart/backend/templates/interface.tmpl.go
index 082a44b..4ad038f 100644
--- a/bin/fidlgen_dart/backend/templates/interface.tmpl.go
+++ b/bin/fidlgen_dart/backend/templates/interface.tmpl.go
@@ -52,12 +52,12 @@
 class {{ .ProxyName }} extends $fidl.Proxy<{{ .Name }}>
     implements {{ .Name }} {
 
-  {{ .ProxyName }}() : super(new $fidl.ProxyController<{{ .Name }}>($serviceName: {{ .ServiceName }}, $interfaceName: r'{{ .Name }}')) {
+  {{ .ProxyName }}() : super($fidl.ProxyController<{{ .Name }}>($serviceName: {{ .ServiceName }}, $interfaceName: r'{{ .Name }}')) {
     ctrl.onResponse = _handleResponse;
   }
 
   void _handleEvent($fidl.Message $message) {
-    final $fidl.Decoder $decoder = new $fidl.Decoder($message);
+    final $fidl.Decoder $decoder = $fidl.Decoder($message);
     switch ($message.ordinal) {
 {{- range .Methods }}
 {{- if not .HasRequest }}
@@ -108,7 +108,7 @@
       $message.closeHandles();
       return;
     }
-    final $fidl.Decoder $decoder = new $fidl.Decoder($message);
+    final $fidl.Decoder $decoder = $fidl.Decoder($message);
     switch ($message.ordinal) {
 {{- range .Methods }}
   {{- if .HasRequest }}
@@ -152,7 +152,7 @@
       return;
     }
 
-    final $fidl.Encoder $encoder = new $fidl.Encoder();
+    final $fidl.Encoder $encoder = $fidl.Encoder();
     $encoder.encodeMessageHeader({{ .OrdinalName }}, 0);
     {{- if .Request }}
     $encoder.alloc({{ .RequestSize }} - $fidl.kMessageHeaderSize);
@@ -202,7 +202,7 @@
   {{- if not .HasRequest }}
     {{- if .HasResponse }}
   void {{ template "ResponseMethodSignature" . }} {
-    final $fidl.Encoder $encoder = new $fidl.Encoder();
+    final $fidl.Encoder $encoder = $fidl.Encoder();
     $encoder.encodeMessageHeader({{ .OrdinalName }}, 0);
       {{- if .Response.WireParameters }}
     $encoder.alloc({{ .ResponseSize }} - $fidl.kMessageHeaderSize);
@@ -226,7 +226,7 @@
     events._binding = this;
   }
 
-  final {{ .EventsName }} events = new {{ .EventsName }}();
+  final {{ .EventsName }} events = {{ .EventsName }}();
 {{- end }}
 
 {{ range .Methods }}
@@ -234,7 +234,7 @@
     {{- if .HasResponse }}
   Function _{{ .Name }}Responder($fidl.MessageSink $respond, int $txid) {
     return ({{ template "Params" .Response.WireParameters }}) {
-      final $fidl.Encoder $encoder = new $fidl.Encoder();
+      final $fidl.Encoder $encoder = $fidl.Encoder();
       $encoder.encodeMessageHeader({{ .OrdinalName }}, $txid);
       {{- if .Response.WireParameters }}
       $encoder.alloc({{ .ResponseSize }} - $fidl.kMessageHeaderSize);
@@ -252,7 +252,7 @@
 
   @override
   void handleMessage($fidl.Message $message, $fidl.MessageSink $respond) {
-    final $fidl.Decoder $decoder = new $fidl.Decoder($message);
+    final $fidl.Decoder $decoder = $fidl.Decoder($message);
     switch ($message.ordinal) {
 {{- range .Methods }}
   {{- if .HasRequest }}
@@ -282,7 +282,7 @@
   {{- end }}
 {{- end }}
       default:
-        throw new $fidl.FidlError('Unexpected message name for {{ .BindingName }}');
+        throw $fidl.FidlError('Unexpected message name for {{ .BindingName }}');
     }
   }
 }
@@ -343,7 +343,7 @@
     $types[0].decode($decoder, 0)
   {{- else }}
     {{- if .AsyncResponseClass -}}
-      new {{ .AsyncResponseClass }}(
+      {{ .AsyncResponseClass }}(
         {{- range $index, $response := .Response.WireParameters }}
           $types[{{ $index }}].decode($decoder, 0),
         {{- end -}}
@@ -411,7 +411,7 @@
 abstract class {{ .Name }} extends $fidl.Service {
   static const String $serviceName = {{ .ServiceName }};
   @override
-  $fidl.ServiceData get $serviceData => const {{ .ServiceData }}();
+  $fidl.ServiceData get $serviceData => {{ .ServiceData }}();
 
 {{- range .Methods }}
   {{- if .HasRequest }}
@@ -458,7 +458,7 @@
 {{- end }}
 class {{ .ProxyName }} extends $fidl.AsyncProxy<{{ .Name }}>
     implements {{ .Name }} {
-  {{ .ProxyName }}() : super(new $fidl.AsyncProxyController<{{ .Name }}>($serviceName: {{ .ServiceName }}, $interfaceName: r'{{ .Name }}')) {
+  {{ .ProxyName }}() : super($fidl.AsyncProxyController<{{ .Name }}>($serviceName: {{ .ServiceName }}, $interfaceName: r'{{ .Name }}')) {
     ctrl.onResponse = _handleResponse;
 
     {{- if .HasEvents }}
@@ -479,7 +479,7 @@
   $fidl.ServiceData get $serviceData => {{ .ServiceData }}();
 
   void _handleEvent($fidl.Message $message) {
-    final $fidl.Decoder $decoder = new $fidl.Decoder($message);
+    final $fidl.Decoder $decoder = $fidl.Decoder($message);
     switch ($message.ordinal) {
 {{- range .Methods }}
 {{- if not .HasRequest }}
@@ -495,7 +495,7 @@
           );
         // ignore: avoid_catches_without_on_clauses
         } catch(_e) {
-          ctrl.proxyError(new $fidl.FidlError('Exception handling event $_name: $_e'));
+          ctrl.proxyError($fidl.FidlError('Exception handling event $_name: $_e'));
           ctrl.close();
           rethrow;
         } finally {
@@ -506,7 +506,7 @@
 {{- end }}
 {{- end }}
       default:
-        ctrl.proxyError(new $fidl.FidlError('Unexpected message ordinal: ${$message.ordinal}'));
+        ctrl.proxyError($fidl.FidlError('Unexpected message ordinal: ${$message.ordinal}'));
         ctrl.close();
         break;
     }
@@ -523,7 +523,7 @@
       $message.closeHandles();
       return;
     }
-    final $fidl.Decoder $decoder = new $fidl.Decoder($message);
+    final $fidl.Decoder $decoder = $fidl.Decoder($message);
     switch ($message.ordinal) {
 {{- range .Methods }}
   {{- if .HasRequest }}
@@ -560,7 +560,7 @@
           {{ end }}
         // ignore: avoid_catches_without_on_clauses
         } catch(_e) {
-          ctrl.proxyError(new $fidl.FidlError('Exception handling method response $_name: $_e'));
+          ctrl.proxyError($fidl.FidlError('Exception handling method response $_name: $_e'));
           ctrl.close();
           rethrow;
         } finally {
@@ -571,7 +571,7 @@
   {{- end }}
 {{- end }}
       default:
-        ctrl.proxyError(new $fidl.FidlError('Unexpected message ordinal: ${$message.ordinal}'));
+        ctrl.proxyError($fidl.FidlError('Unexpected message ordinal: ${$message.ordinal}'));
         ctrl.close();
         break;
     }
@@ -585,10 +585,10 @@
     @override
     {{ template "AsyncReturn" . }} {{ .Name }}({{ template "AsyncParams" .Request }}) async {
       if (!ctrl.isBound) {
-        return new Future.error(new $fidl.FidlStateException('Proxy<${ctrl.$interfaceName}> is closed.'), StackTrace.current);
+        return Future.error($fidl.FidlStateException('Proxy<${ctrl.$interfaceName}> is closed.'), StackTrace.current);
       }
 
-      final $fidl.Encoder $encoder = new $fidl.Encoder();
+      final $fidl.Encoder $encoder = $fidl.Encoder();
       $encoder.encodeMessageHeader({{ .OrdinalName }}, 0);
       {{- if .Request }}
         $encoder.alloc({{ .RequestSize }} - $fidl.kMessageHeaderSize);
@@ -599,17 +599,17 @@
       {{- end }}
 
       {{- if .HasResponse }}
-        final $completer = new Completer<{{ .AsyncResponseType }}>();
+        final $completer = Completer<{{ .AsyncResponseType }}>();
         ctrl.sendMessageWithResponse($encoder.message, $completer);
         return $completer.future;
       {{- else }}
-        return new Future.sync(() {
+        return Future.sync(() {
           ctrl.sendMessage($encoder.message);
         });
       {{- end }}
     }
   {{ else }}
-    final _{{ .Name }}EventStreamController = new StreamController<{{ .AsyncResponseType }}>.broadcast();
+    final _{{ .Name }}EventStreamController = StreamController<{{ .AsyncResponseType }}>.broadcast();
     {{- range .Doc }}
     ///{{ . -}}
     {{- end }}
@@ -634,7 +634,7 @@
         {{- if not .HasRequest }}
           if (impl.{{ .Name }} != null) {
             $subscriptions.add(impl.{{ .Name }}.listen(($response) {
-              final $fidl.Encoder $encoder = new $fidl.Encoder();
+              final $fidl.Encoder $encoder = $fidl.Encoder();
               $encoder.encodeMessageHeader({{ .OrdinalName }}, 0);
               $encoder.alloc({{ .ResponseSize }} - $fidl.kMessageHeaderSize);
               final List<$fidl.MemberType> $types = {{ .TypeSymbol }}.response;
@@ -653,7 +653,7 @@
 
   @override
   void handleMessage($fidl.Message $message, $fidl.MessageSink $respond) {
-    final $fidl.Decoder $decoder = new $fidl.Decoder($message);
+    final $fidl.Decoder $decoder = $fidl.Decoder($message);
     switch ($message.ordinal) {
     {{- range .Methods }}
       {{- if .HasRequest }}
@@ -696,7 +696,7 @@
                 })
                 {{ end }}
                 .then(($response) {
-                  final $fidl.Encoder $encoder = new $fidl.Encoder();
+                  final $fidl.Encoder $encoder = $fidl.Encoder();
                   $encoder.encodeMessageHeader({{ .OrdinalName }}, $message.txid);
                   {{- if .Response.WireParameters }}
                     $encoder.alloc({{ .ResponseSize }} - $fidl.kMessageHeaderSize);
@@ -721,7 +721,7 @@
       {{- end }}
     {{- end }}
       default:
-        throw new $fidl.FidlError('Unexpected message name for {{ .BindingName }}');
+        throw $fidl.FidlError('Unexpected message name for {{ .BindingName }}');
     }
   }
 }
diff --git a/bin/fidlgen_dart/backend/templates/struct.tmpl.go b/bin/fidlgen_dart/backend/templates/struct.tmpl.go
index 69eb657..3a33757 100644
--- a/bin/fidlgen_dart/backend/templates/struct.tmpl.go
+++ b/bin/fidlgen_dart/backend/templates/struct.tmpl.go
@@ -78,7 +78,7 @@
     )';
   }
 
-  static {{ .Name }} _ctor(List<Object> argv) => new {{ .Name }}._(argv);
+  static {{ .Name }} _ctor(List<Object> argv) => {{ .Name }}._(argv);
 }
 
 // See FIDL-308:
diff --git a/bin/fidlgen_dart/backend/templates/table.tmpl.go b/bin/fidlgen_dart/backend/templates/table.tmpl.go
index 1a01f37..6785bb2 100644
--- a/bin/fidlgen_dart/backend/templates/table.tmpl.go
+++ b/bin/fidlgen_dart/backend/templates/table.tmpl.go
@@ -41,7 +41,7 @@
     };
   }
 
-  static {{ .Name }} _ctor(Map<int, dynamic> argv) => new {{ .Name }}._(argv);
+  static {{ .Name }} _ctor(Map<int, dynamic> argv) => {{ .Name }}._(argv);
 }
 
 // See FIDL-308:
diff --git a/bin/fidlgen_dart/backend/templates/union.tmpl.go b/bin/fidlgen_dart/backend/templates/union.tmpl.go
index 9f00b2a..4fe3146 100644
--- a/bin/fidlgen_dart/backend/templates/union.tmpl.go
+++ b/bin/fidlgen_dart/backend/templates/union.tmpl.go
@@ -59,7 +59,7 @@
   Object get $data => _data;
 
   static {{ .Name }} _ctor(int index, Object data) {
-    return new {{ .Name }}._({{ .TagName }}.values[index], data);
+    return {{ .Name }}._({{ .TagName }}.values[index], data);
   }
 }
 
diff --git a/bin/fidlgen_dart/backend/templates/xunion.tmpl.go b/bin/fidlgen_dart/backend/templates/xunion.tmpl.go
index 162f56d..c9855ab 100644
--- a/bin/fidlgen_dart/backend/templates/xunion.tmpl.go
+++ b/bin/fidlgen_dart/backend/templates/xunion.tmpl.go
@@ -13,7 +13,7 @@
 {{- end }}
 }
 
-const Map<int, {{ .TagName }}> _{{ .TagName }}_map = const {
+const Map<int, {{ .TagName }}> _{{ .TagName }}_map = {
 {{- range .Members }}
   {{ .Ordinal }}: {{ $.TagName }}.{{ .Name }},
 {{- end }}
@@ -65,7 +65,7 @@
   Object get $data => _data;
 
   static {{ .Name }} _ctor(int ordinal, Object data) {
-    return new {{ .Name }}._(ordinal, data);
+    return {{ .Name }}._(ordinal, data);
   }
 }
 
diff --git a/bin/flutter_screencap_test/lib/main.dart b/bin/flutter_screencap_test/lib/main.dart
index 5e67627..f14541f 100644
--- a/bin/flutter_screencap_test/lib/main.dart
+++ b/bin/flutter_screencap_test/lib/main.dart
@@ -5,8 +5,8 @@
 import 'package:flutter/material.dart';
 import 'package:lib.app.dart/logging.dart';
 
-const Color _lightColor = const Color(0xFF4dac26);
-const Color _darkColor = const Color(0xFFd01c8b);
+const Color _lightColor = Color(0xFF4dac26);
+const Color _darkColor = Color(0xFFd01c8b);
 const int _gridSize = 6;
 
 /// Display a checker board pattern in red and green to verify that the
@@ -15,23 +15,23 @@
   @override
   Widget build(BuildContext context) {
     Size size = MediaQuery.of(context).size;
-    Size oneSize = new Size(size.width / _gridSize, size.height / _gridSize);
+    Size oneSize = Size(size.width / _gridSize, size.height / _gridSize);
     List<Widget> rows = <Widget>[];
     for (int i = 0; i < _gridSize; i++) {
       List<Widget> boxes = <Widget>[];
       for (int j = 0; j < _gridSize; j++) {
-        boxes.add(new Container(
+        boxes.add(Container(
           width: oneSize.width,
           height: oneSize.height,
           color: (i % 2) == (j % 2) ? _darkColor : _lightColor,
         ));
       }
-      rows.add(new Row(
+      rows.add(Row(
         children: boxes,
         mainAxisSize: MainAxisSize.max,
       ));
     }
-    return new Column(
+    return Column(
       mainAxisSize: MainAxisSize.max,
       children: rows,
     );
@@ -44,7 +44,7 @@
     logToStdoutForTest: true,
   );
   log.info('starting flutter_screencap_test_app');
-  runApp(new MaterialApp(
-    home: new CheckerBoard(),
+  runApp(MaterialApp(
+    home: CheckerBoard(),
   ));
 }
diff --git a/bin/simple_browser/lib/src/widgets/navigation_bar.dart b/bin/simple_browser/lib/src/widgets/navigation_bar.dart
index 78daa70..cbbe87a 100644
--- a/bin/simple_browser/lib/src/widgets/navigation_bar.dart
+++ b/bin/simple_browser/lib/src/widgets/navigation_bar.dart
@@ -24,7 +24,7 @@
                 initialData: false,
                 builder: (context, snapshot) => RaisedButton(
                       padding: EdgeInsets.all(4),
-                      child: const Text('BCK'),
+                      child: Text('BCK'),
                       color: Colors.grey[350],
                       disabledColor: Colors.grey[700],
                       onPressed: snapshot.data
@@ -40,7 +40,7 @@
                 initialData: false,
                 builder: (context, snapshot) => RaisedButton(
                       padding: EdgeInsets.all(4),
-                      child: const Text('FWD'),
+                      child: Text('FWD'),
                       color: Colors.grey[350],
                       disabledColor: Colors.grey[700],
                       onPressed: snapshot.data
diff --git a/bin/system_dashboard/lib/src/dashboard.dart b/bin/system_dashboard/lib/src/dashboard.dart
index e31a76d..75bce31 100644
--- a/bin/system_dashboard/lib/src/dashboard.dart
+++ b/bin/system_dashboard/lib/src/dashboard.dart
@@ -47,7 +47,7 @@
 
   Widget _utilization(SystemInfoModel model) {
     return Padding(
-        padding: const EdgeInsets.all(1.0),
+        padding: EdgeInsets.all(1.0),
         child: Column(
           mainAxisAlignment: MainAxisAlignment.start,
           crossAxisAlignment: CrossAxisAlignment.start,
@@ -64,7 +64,7 @@
                     child: LinearProgressIndicator(
                       value: model.cpuUtilization / 100,
                       backgroundColor: Colors.greenAccent,
-                      valueColor: new AlwaysStoppedAnimation<Color>(Colors.red),
+                      valueColor: AlwaysStoppedAnimation<Color>(Colors.red),
                     ),
                   ),
                 ),
@@ -76,7 +76,7 @@
                     child: LinearProgressIndicator(
                       value: model.memoryUtilization / 100,
                       backgroundColor: Colors.greenAccent,
-                      valueColor: new AlwaysStoppedAnimation<Color>(Colors.red),
+                      valueColor: AlwaysStoppedAnimation<Color>(Colors.red),
                     ),
                   ),
                 ),
@@ -104,7 +104,7 @@
 
   Widget _fanSpeedAndTemperature(SystemInfoModel model) {
     return Padding(
-        padding: const EdgeInsets.all(1.0),
+        padding: EdgeInsets.all(1.0),
         child: Column(
           mainAxisAlignment: MainAxisAlignment.start,
           crossAxisAlignment: CrossAxisAlignment.start,
@@ -117,7 +117,7 @@
                     color: Colors.lightBlue,
                     shape: CircleBorder(),
                     child: Padding(
-                      padding: const EdgeInsets.all(10.0),
+                      padding: EdgeInsets.all(10.0),
                       child: Icon(Icons.settings_applications,
                           color: Colors.white, size: 30.0),
                     )),
@@ -125,7 +125,7 @@
                     color: Colors.green[400],
                     shape: CircleBorder(),
                     child: Padding(
-                      padding: const EdgeInsets.all(10.0),
+                      padding: EdgeInsets.all(10.0),
                       child: Icon(Icons.ac_unit, color: Colors.white, size: 30.0),
                     )),
               ],
@@ -152,7 +152,7 @@
   
   Widget _bigCluster(SystemInfoModel model) {
     return Padding(
-        padding: const EdgeInsets.all(5.0),
+        padding: EdgeInsets.all(5.0),
         child: Column(
           mainAxisAlignment: MainAxisAlignment.start,
           crossAxisAlignment: CrossAxisAlignment.start,
@@ -168,7 +168,7 @@
                     color: Colors.indigo[500],
                     shape: CircleBorder(),
                     child: Padding(
-                      padding: const EdgeInsets.all(16.0),
+                      padding: EdgeInsets.all(16.0),
                       child: Icon(Icons.broken_image,
                           color: Colors.white, size: 30.0),
                     )),
@@ -176,7 +176,7 @@
                     color: Colors.amber,
                     shape: CircleBorder(),
                     child: Padding(
-                      padding: const EdgeInsets.all(16.0),
+                      padding: EdgeInsets.all(16.0),
                       child:
                       Icon(Icons.flash_on, color: Colors.white, size: 30.0),
                     )),
@@ -204,7 +204,7 @@
 
   Widget _littleCluster(SystemInfoModel model) {
     return Padding(
-        padding: const EdgeInsets.all(5.0),
+        padding: EdgeInsets.all(5.0),
         child: Column(
           mainAxisAlignment: MainAxisAlignment.start,
           crossAxisAlignment: CrossAxisAlignment.start,
@@ -220,7 +220,7 @@
                     color: Colors.indigo[500],
                     shape: CircleBorder(),
                     child: Padding(
-                      padding: const EdgeInsets.all(16.0),
+                      padding: EdgeInsets.all(16.0),
                       child: Icon(Icons.broken_image,
                           color: Colors.white, size: 30.0),
                     )),
@@ -228,7 +228,7 @@
                     color: Colors.amber,
                     shape: CircleBorder(),
                     child: Padding(
-                      padding: const EdgeInsets.all(16.0),
+                      padding: EdgeInsets.all(16.0),
                       child:
                       Icon(Icons.flash_on, color: Colors.white, size: 30.0),
                     )),
diff --git a/bin/system_dashboard/lib/src/system_info_model.dart b/bin/system_dashboard/lib/src/system_info_model.dart
index 6c8f595..bc724f2 100644
--- a/bin/system_dashboard/lib/src/system_info_model.dart
+++ b/bin/system_dashboard/lib/src/system_info_model.dart
@@ -23,7 +23,7 @@
   List<scpi.DvfsOpp> _bigClusterOpps;
   List<scpi.DvfsOpp> _smallClusterOpps;
 
-  static const Duration _systemInformationUpdatePeriod = const Duration(seconds: 4);
+  static const Duration _systemInformationUpdatePeriod = Duration(seconds: 4);
 
   final scpi.SystemControllerProxy _systemControllerProxy = scpi.SystemControllerProxy();
 
diff --git a/bin/ui/benchmarks/image_grid_flutter/lib/image_grid.dart b/bin/ui/benchmarks/image_grid_flutter/lib/image_grid.dart
index 7617855..c2bdbce 100644
--- a/bin/ui/benchmarks/image_grid_flutter/lib/image_grid.dart
+++ b/bin/ui/benchmarks/image_grid_flutter/lib/image_grid.dart
@@ -9,10 +9,10 @@
 import 'package:flutter/rendering.dart';
 import 'package:meta/meta.dart';
 
-const EdgeInsets _kPadding = const EdgeInsets.only(top: 32.0, bottom: 12.0);
+const EdgeInsets _kPadding = EdgeInsets.only(top: 32.0, bottom: 12.0);
 
 const ListEquality<RawImage> _kImageListEquality =
-    const ListEquality<RawImage>();
+    ListEquality<RawImage>();
 
 // Shows a grid of horizontally scrolling images. Their scroll behavior is
 // driven automatically using a ScrollController (see ImageGridModel).
@@ -34,34 +34,34 @@
 
   @override
   Widget build(BuildContext context) {
-    return new DefaultTextStyle(
-      style: const TextStyle(
+    return DefaultTextStyle(
+      style: TextStyle(
         color: Colors.black,
         fontSize: 8.0,
         height: 1.2,
       ),
-      child: new Container(
+      child: Container(
         padding: _kPadding,
-        child: new Column(
+        child: Column(
           mainAxisSize: MainAxisSize.max,
           children: <Widget>[
-            new Text('Image Grid Test (Flutter)'),
-            new Container(
+            Text('Image Grid Test (Flutter)'),
+            Container(
               height: 8.0,
             ),
-            new Expanded(
-              child: new CustomScrollView(
+            Expanded(
+              child: CustomScrollView(
                 scrollDirection: Axis.horizontal,
                 controller: scrollController,
                 slivers: <Widget>[
-                  new SliverPadding(
-                    padding: const EdgeInsets.only(left: 32.0),
-                    sliver: new SliverGrid(
-                      gridDelegate: new _ImageGridDelegate(
+                  SliverPadding(
+                    padding: EdgeInsets.only(left: 32.0),
+                    sliver: SliverGrid(
+                      gridDelegate: _ImageGridDelegate(
                         images: images,
                         rowCount: 3,
                       ),
-                      delegate: new SliverChildBuilderDelegate(
+                      delegate: SliverChildBuilderDelegate(
                           (BuildContext context, int index) =>
                               _buildItem(images[index]),
                           childCount: images.length),
@@ -77,18 +77,18 @@
   }
 
   Widget _buildItem(RawImage image) {
-    return new Container(
-      padding: const EdgeInsets.only(
+    return Container(
+      padding: EdgeInsets.only(
         right: 16.0,
         bottom: 16.0,
       ),
-      child: new PhysicalModel(
+      child: PhysicalModel(
         color: Colors.grey[200],
-        borderRadius: new BorderRadius.circular(4.0),
+        borderRadius: BorderRadius.circular(4.0),
         elevation: 2.0,
         child: drawImages
             ? image
-            : new Container(
+            : Container(
                 width: 500.0,
                 height: 500.0,
               ),
@@ -112,7 +112,7 @@
   SliverGridLayout getLayout(SliverConstraints constraints) {
     if (_newConstraints(constraints)) {
       _lastConstraints = constraints;
-      _lastLayout = new _ImageGridLayout(
+      _lastLayout = _ImageGridLayout(
         sliverGridGeometryList: _getSliverGeometryList(
           constraints.crossAxisExtent,
         ),
@@ -173,7 +173,7 @@
       double crossAxisOffset = rowHeight * rowIndex;
       double mainAxisExtent = _getScaledImageWidth(image, rowHeight);
       double crossAxisExtent = rowHeight;
-      SliverGridGeometry gridGeometry = new SliverGridGeometry(
+      SliverGridGeometry gridGeometry = SliverGridGeometry(
         scrollOffset: scrollOffset,
         crossAxisOffset: crossAxisOffset,
         mainAxisExtent: mainAxisExtent,
diff --git a/bin/ui/benchmarks/image_grid_flutter/lib/image_grid_model.dart b/bin/ui/benchmarks/image_grid_flutter/lib/image_grid_model.dart
index 1d4d1d9..ef77978 100644
--- a/bin/ui/benchmarks/image_grid_flutter/lib/image_grid_model.dart
+++ b/bin/ui/benchmarks/image_grid_flutter/lib/image_grid_model.dart
@@ -13,7 +13,7 @@
 import 'package:lib.widgets/widgets.dart';
 
 const RK4SpringDescription _kSimulationDesc =
-    const RK4SpringDescription(tension: 10.0, friction: 50.0);
+    RK4SpringDescription(tension: 10.0, friction: 50.0);
 const double _kMinScrollOffset = 0.0;
 const double _kMaxScrollOffset = 4000.0;
 const int _kNumImages = 100;
@@ -21,7 +21,7 @@
 /// [Model] that manages the state of the Image Grid Module
 class ImageGridModel extends Model {
   final _TracedSpringModel _scrollModel =
-      new _TracedSpringModel(springDescription: _kSimulationDesc);
+      _TracedSpringModel(springDescription: _kSimulationDesc);
 
   ImageGridModel() {
     scheduleMicrotask(() {
@@ -30,7 +30,7 @@
         _scrollModel.jump(0.0);
 
         // Set up auto-scroller behavior.
-        _scrollController = new ScrollController();
+        _scrollController = ScrollController();
         _scrollModel
           ..addListener(() {
             if (!_scrollController.hasClients) {
@@ -53,21 +53,21 @@
   Future<List<RawImage>> generateImages() async {
     List<RawImage> images = [];
     for (int i = 0; i < _kNumImages; i++) {
-      var recorder = new ui.PictureRecorder();
-      var canvas = new Canvas(recorder);
-      var color = const Color(0xFF673AB7); // Deep Purple 500
+      var recorder = ui.PictureRecorder();
+      var canvas = Canvas(recorder);
+      var color = Color(0xFF673AB7); // Deep Purple 500
       canvas.drawColor(color, BlendMode.srcOver);
 
-      final paint = new Paint()
-        ..color = const Color(0xFFF50057) // Pink A400
+      final paint = Paint()
+        ..color = Color(0xFFF50057) // Pink A400
         ..style = PaintingStyle.fill;
 
-      canvas.drawCircle(new Offset(250.0, 250.0), 200.0, paint);
+      canvas.drawCircle(Offset(250.0, 250.0), 200.0, paint);
 
       var image = await recorder.endRecording().toImage(500, 500);
 
       images.add(
-          new RawImage(image: image, width: 500.0, height: 500.0, scale: 1.0));
+          RawImage(image: image, width: 500.0, height: 500.0, scale: 1.0));
     }
     return images;
   }
@@ -83,7 +83,7 @@
 
 class _TracedSpringModel extends SpringModel {
   final FrameRateTracer _frameRateTracer =
-      new FrameRateTracer(name: 'auto scroll');
+      FrameRateTracer(name: 'auto scroll');
   _TracedSpringModel({RK4SpringDescription springDescription})
       : super(springDescription: springDescription);
 
diff --git a/bin/ui/benchmarks/image_grid_flutter/lib/main.dart b/bin/ui/benchmarks/image_grid_flutter/lib/main.dart
index 924eeab..d1b2bdb 100644
--- a/bin/ui/benchmarks/image_grid_flutter/lib/main.dart
+++ b/bin/ui/benchmarks/image_grid_flutter/lib/main.dart
@@ -12,29 +12,29 @@
 void main() {
   setupLogger(name: 'Image Grid ');
 
-  ImageGridModel imageGridModel = new ImageGridModel();
+  ImageGridModel imageGridModel = ImageGridModel();
 
   runApp(
-    new MaterialApp(
-      home: new ScopedModel<ImageGridModel>(
+    MaterialApp(
+      home: ScopedModel<ImageGridModel>(
         model: imageGridModel,
-        child: new ScopedModelDescendant<ImageGridModel>(
+        child: ScopedModelDescendant<ImageGridModel>(
           builder: (BuildContext context, Widget child, ImageGridModel model) {
-            return new ScopedModelDescendant<ImageGridModel>(
+            return ScopedModelDescendant<ImageGridModel>(
               builder: (
                 BuildContext context,
                 Widget child,
                 ImageGridModel model,
               ) {
-                return new Scaffold(
+                return Scaffold(
                   backgroundColor: Colors.white,
                   body: model.images != null
-                      ? new ImageGrid(
+                      ? ImageGrid(
                           images: model.images,
                           drawImages: false,
                           scrollController: model.scrollController,
                         )
-                      : new Container(),
+                      : Container(),
                 );
               },
             );
diff --git a/bin/userpicker_base_shell/lib/authentication_overlay.dart b/bin/userpicker_base_shell/lib/authentication_overlay.dart
index df554e9..ae4c170 100644
--- a/bin/userpicker_base_shell/lib/authentication_overlay.dart
+++ b/bin/userpicker_base_shell/lib/authentication_overlay.dart
@@ -25,31 +25,31 @@
 
   @override
   Widget build(BuildContext context) =>
-      new ScopedModelDescendant<AuthenticationOverlayModel>(
+      ScopedModelDescendant<AuthenticationOverlayModel>(
         builder: (
           BuildContext context,
           Widget child,
           AuthenticationOverlayModel model,
         ) =>
-            new AnimatedBuilder(
+            AnimatedBuilder(
               animation: model.animation,
-              builder: (BuildContext context, Widget child) => new Offstage(
+              builder: (BuildContext context, Widget child) => Offstage(
                     offstage: model.animation.isDismissed,
-                    child: new Opacity(
+                    child: Opacity(
                       opacity: model.animation.value,
                       child: child,
                     ),
                   ),
-              child: new Stack(
+              child: Stack(
                 fit: StackFit.passthrough,
                 children: <Widget>[
-                  new GestureDetector(
+                  GestureDetector(
                     onTap: _onCancel,
                   ),
-                  new FractionallySizedBox(
+                  FractionallySizedBox(
                     widthFactor: 0.75,
                     heightFactor: 0.75,
-                    child: new ChildView(
+                    child: ChildView(
                       connection: model.childViewConnection,
                     ),
                   ),
diff --git a/bin/userpicker_base_shell/lib/authentication_overlay_model.dart b/bin/userpicker_base_shell/lib/authentication_overlay_model.dart
index fe633c1..8ad3329 100644
--- a/bin/userpicker_base_shell/lib/authentication_overlay_model.dart
+++ b/bin/userpicker_base_shell/lib/authentication_overlay_model.dart
@@ -18,12 +18,12 @@
 
   /// Constructor.
   AuthenticationOverlayModel() {
-    _transitionAnimation = new AnimationController(
+    _transitionAnimation = AnimationController(
       value: 0.0,
-      duration: const Duration(seconds: 1),
+      duration: Duration(seconds: 1),
       vsync: this,
     );
-    _curvedTransitionAnimation = new CurvedAnimation(
+    _curvedTransitionAnimation = CurvedAnimation(
       parent: _transitionAnimation,
       curve: Curves.fastOutSlowIn,
       reverseCurve: Curves.fastOutSlowIn,
@@ -73,5 +73,5 @@
   }
 
   @override
-  Ticker createTicker(TickerCallback onTick) => new Ticker(onTick);
+  Ticker createTicker(TickerCallback onTick) => Ticker(onTick);
 }
diff --git a/bin/userpicker_base_shell/lib/authentication_ui_context_impl.dart b/bin/userpicker_base_shell/lib/authentication_ui_context_impl.dart
index 9543fc5..15961d4 100644
--- a/bin/userpicker_base_shell/lib/authentication_ui_context_impl.dart
+++ b/bin/userpicker_base_shell/lib/authentication_ui_context_impl.dart
@@ -29,7 +29,7 @@
 
   @override
   Future<void> startOverlay(InterfaceHandle<ViewOwner> viewOwner) =>
-      startOverlay2(new EventPair(viewOwner?.passChannel()?.passHandle()));
+      startOverlay2(EventPair(viewOwner?.passChannel()?.passHandle()));
 
   @override
   // ignore: override_on_non_overriding_method
diff --git a/bin/userpicker_base_shell/lib/circular_button.dart b/bin/userpicker_base_shell/lib/circular_button.dart
index 6beafab..9ff5eae 100644
--- a/bin/userpicker_base_shell/lib/circular_button.dart
+++ b/bin/userpicker_base_shell/lib/circular_button.dart
@@ -18,15 +18,15 @@
       : assert(icon != null);
 
   @override
-  Widget build(BuildContext context) => new Material(
+  Widget build(BuildContext context) => Material(
         type: MaterialType.circle,
         elevation: 2.0,
         color: Colors.grey[200],
-        child: new InkWell(
+        child: InkWell(
           onTap: () => onTap?.call(),
-          child: new Container(
-            padding: const EdgeInsets.all(12.0),
-            child: new Icon(icon),
+          child: Container(
+            padding: EdgeInsets.all(12.0),
+            child: Icon(icon),
           ),
         ),
       );
diff --git a/bin/userpicker_base_shell/lib/clock.dart b/bin/userpicker_base_shell/lib/clock.dart
index ed7e932..98c04d7 100644
--- a/bin/userpicker_base_shell/lib/clock.dart
+++ b/bin/userpicker_base_shell/lib/clock.dart
@@ -10,19 +10,19 @@
 
 /// System Clock in the Base Shell
 class Clock extends StatelessWidget {
-  final TimeStringer _time = new TimeStringer();
+  final TimeStringer _time = TimeStringer();
 
   @override
   Widget build(BuildContext context) {
-    return new LayoutBuilder(
+    return LayoutBuilder(
       builder: (BuildContext context, BoxConstraints constraints) {
-        return new AnimatedBuilder(
+        return AnimatedBuilder(
           animation: _time,
           builder: (BuildContext context, Widget child) {
-            return new Container(
-              child: new Text(
+            return Container(
+              child: Text(
                 _time.timeOnly,
-                style: new TextStyle(
+                style: TextStyle(
                   color: Colors.white,
                   fontSize: min(
                     constraints.maxWidth / 6.0,
diff --git a/bin/userpicker_base_shell/lib/main.dart b/bin/userpicker_base_shell/lib/main.dart
index a9fd421..d39ed70 100644
--- a/bin/userpicker_base_shell/lib/main.dart
+++ b/bin/userpicker_base_shell/lib/main.dart
@@ -31,12 +31,12 @@
 
 void main() {
   setupLogger(name: 'userpicker_base_shell');
-  StartupContext startupContext = new StartupContext.fromStartupInfo();
+  StartupContext startupContext = StartupContext.fromStartupInfo();
 
   // Connect to Cobalt
-  cobalt.LoggerProxy logger = new cobalt.LoggerProxy();
+  cobalt.LoggerProxy logger = cobalt.LoggerProxy();
 
-  cobalt.LoggerFactoryProxy loggerFactory = new cobalt.LoggerFactoryProxy();
+  cobalt.LoggerFactoryProxy loggerFactory = cobalt.LoggerFactoryProxy();
   StartupContext.fromStartupInfo().incoming.connectToService(loggerFactory);
 
   SizedVmo configVmo = SizedVmo.fromFile(_kCobaltConfigBinProtoPath);
@@ -52,18 +52,18 @@
   });
   loggerFactory.ctrl.close();
 
-  NetstackProxy netstackProxy = new NetstackProxy();
+  NetstackProxy netstackProxy = NetstackProxy();
   StartupContext.fromStartupInfo().incoming.connectToService(netstackProxy);
 
-  NetstackModel netstackModel = new NetstackModel(netstack: netstackProxy)
+  NetstackModel netstackModel = NetstackModel(netstack: netstackProxy)
     ..start();
 
-  _OverlayModel wifiInfoOverlayModel = new _OverlayModel();
+  _OverlayModel wifiInfoOverlayModel = _OverlayModel();
 
   final AuthenticationOverlayModel authModel = AuthenticationOverlayModel();
 
   UserPickerBaseShellModel userPickerBaseShellModel =
-      new UserPickerBaseShellModel(
+      UserPickerBaseShellModel(
     onBaseShellStopped: () {
       netstackProxy.ctrl.close();
       netstackModel.dispose();
@@ -77,13 +77,13 @@
     logger: logger,
   );
 
-  Widget mainWidget = new Stack(
+  Widget mainWidget = Stack(
     fit: StackFit.passthrough,
     children: <Widget>[
-      new UserPickerBaseShellScreen(
+      UserPickerBaseShellScreen(
         launcher: startupContext.launcher,
       ),
-      new ScopedModel<AuthenticationOverlayModel>(
+      ScopedModel<AuthenticationOverlayModel>(
         model: authModel,
         child: AuthenticationOverlay(),
       ),
@@ -93,21 +93,21 @@
   Widget app = mainWidget;
 
   List<OverlayEntry> overlays = <OverlayEntry>[
-    new OverlayEntry(
-      builder: (BuildContext context) => new MediaQuery(
-            data: const MediaQueryData(),
-            child: new FocusScope(
-              node: new FocusScopeNode(),
+    OverlayEntry(
+      builder: (BuildContext context) => MediaQuery(
+            data: MediaQueryData(),
+            child: FocusScope(
+              node: FocusScopeNode(),
               autofocus: true,
               child: app,
             ),
           ),
     ),
-    new OverlayEntry(
-      builder: (BuildContext context) => new ScopedModel<_OverlayModel>(
+    OverlayEntry(
+      builder: (BuildContext context) => ScopedModel<_OverlayModel>(
             model: wifiInfoOverlayModel,
-            child: new _WifiInfo(
-              wifiWidget: new ApplicationWidget(
+            child: _WifiInfo(
+              wifiWidget: ApplicationWidget(
                 url:
                     'fuchsia-pkg://fuchsia.com/wifi_settings#meta/wifi_settings.cmx',
                 launcher: startupContext.launcher,
@@ -117,19 +117,19 @@
     ),
   ];
 
-  _baseShellWidget = new BaseShellWidget<UserPickerBaseShellModel>(
+  _baseShellWidget = BaseShellWidget<UserPickerBaseShellModel>(
     startupContext: startupContext,
     baseShellModel: userPickerBaseShellModel,
-    authenticationUiContext: new AuthenticationUiContextImpl(
+    authenticationUiContext: AuthenticationUiContextImpl(
         onStartOverlay: authModel.onStartOverlay,
         onStopOverlay: authModel.onStopOverlay),
-    child: new LayoutBuilder(
+    child: LayoutBuilder(
       builder: (BuildContext context, BoxConstraints constraints) =>
           (constraints.biggest == Size.zero)
               ? const Offstage()
-              : new ScopedModel<NetstackModel>(
+              : ScopedModel<NetstackModel>(
                   model: netstackModel,
-                  child: new Overlay(initialEntries: overlays),
+                  child: Overlay(initialEntries: overlays),
                 ),
     ),
   );
@@ -146,32 +146,32 @@
 
   @override
   Widget build(BuildContext context) =>
-      new ScopedModelDescendant<_OverlayModel>(
+      ScopedModelDescendant<_OverlayModel>(
         builder: (
           BuildContext context,
           Widget child,
           _OverlayModel model,
         ) =>
-            new Offstage(
+            Offstage(
               offstage: !model.showing,
-              child: new Stack(
+              child: Stack(
                 children: <Widget>[
-                  new Listener(
+                  Listener(
                     behavior: HitTestBehavior.opaque,
                     onPointerDown: (PointerDownEvent event) {
                       model.showing = false;
                     },
                   ),
-                  new Center(
-                    child: new FractionallySizedBox(
+                  Center(
+                    child: FractionallySizedBox(
                       widthFactor: 0.75,
                       heightFactor: 0.75,
-                      child: new Container(
-                        margin: const EdgeInsets.all(8.0),
-                        child: new PhysicalModel(
+                      child: Container(
+                        margin: EdgeInsets.all(8.0),
+                        child: PhysicalModel(
                           color: Colors.grey[900],
                           elevation: _kIndicatorElevation,
-                          borderRadius: new BorderRadius.circular(8.0),
+                          borderRadius: BorderRadius.circular(8.0),
                           child: wifiWidget,
                         ),
                       ),
diff --git a/bin/userpicker_base_shell/lib/time_stringer.dart b/bin/userpicker_base_shell/lib/time_stringer.dart
index b8020b3..b35a06d 100644
--- a/bin/userpicker_base_shell/lib/time_stringer.dart
+++ b/bin/userpicker_base_shell/lib/time_stringer.dart
@@ -7,11 +7,11 @@
 import 'package:flutter/widgets.dart';
 import 'package:intl/intl.dart';
 
-final DateFormat _kTimeOnlyDateFormat = new DateFormat('h:mm', 'en_US');
-final DateFormat _kDateOnlyDateFormat = new DateFormat('EEEE MMM d', 'en_US');
-final DateFormat _kShortStringDateFormat = new DateFormat('h:mm', 'en_US');
-final DateFormat _kLongStringDateFormat = new DateFormat('EEEE h:mm', 'en_US');
-final DateFormat _kMeridiemOnlyFormat = new DateFormat('a', 'en_US');
+final DateFormat _kTimeOnlyDateFormat = DateFormat('h:mm', 'en_US');
+final DateFormat _kDateOnlyDateFormat = DateFormat('EEEE MMM d', 'en_US');
+final DateFormat _kShortStringDateFormat = DateFormat('h:mm', 'en_US');
+final DateFormat _kLongStringDateFormat = DateFormat('EEEE h:mm', 'en_US');
+final DateFormat _kMeridiemOnlyFormat = DateFormat('a', 'en_US');
 
 /// Creates time strings and notifies when they change.
 class TimeStringer extends Listenable {
@@ -43,28 +43,28 @@
   /// Returns the time only (eg. '10:34').
   String get timeOnly => _kTimeOnlyDateFormat
       .format(
-        new DateTime.now(),
+        DateTime.now(),
       )
       .toUpperCase();
 
   /// Returns the date only (eg. 'MONDAY AUG 3').
   String get dateOnly => _kDateOnlyDateFormat
       .format(
-        new DateTime.now(),
+        DateTime.now(),
       )
       .toUpperCase();
 
   /// Returns a short version of the time (eg. '10:34').
   String get shortString =>
-      _kShortStringDateFormat.format(new DateTime.now()).toLowerCase();
+      _kShortStringDateFormat.format(DateTime.now()).toLowerCase();
 
   /// Returns a long version of the time including the day (eg. 'Monday 10:34').
   String get longString =>
-      _kLongStringDateFormat.format(new DateTime.now()).toLowerCase();
+      _kLongStringDateFormat.format(DateTime.now()).toLowerCase();
 
   /// Returns the meridiem (eg. 'AM')
   String get meridiem =>
-      _kMeridiemOnlyFormat.format(new DateTime.now()).toUpperCase();
+      _kMeridiemOnlyFormat.format(DateTime.now()).toUpperCase();
 
   /// Returns the offset, in minutes.
   int get offsetMinutes => _offsetMinutes;
@@ -79,7 +79,7 @@
   void _scheduleTimer() {
     _timer?.cancel();
     _timer =
-        new Timer(new Duration(seconds: 61 - new DateTime.now().second), () {
+        Timer(Duration(seconds: 61 - DateTime.now().second), () {
       _notifyListeners();
       _scheduleTimer();
     });
diff --git a/bin/userpicker_base_shell/lib/user_list.dart b/bin/userpicker_base_shell/lib/user_list.dart
index a04b479..919e021 100644
--- a/bin/userpicker_base_shell/lib/user_list.dart
+++ b/bin/userpicker_base_shell/lib/user_list.dart
@@ -16,7 +16,7 @@
 const double _kButtonFontSizeLarge = 16.0;
 const double _kButtonFontSizeSmall = 14.0;
 
-const TextStyle _kTextStyle = const TextStyle(
+const TextStyle _kTextStyle = TextStyle(
   color: Colors.white,
   fontSize: 10.0,
   letterSpacing: 1.0,
@@ -24,9 +24,9 @@
 );
 
 final BorderRadius _kButtonBorderRadiusPhone =
-    new BorderRadius.circular(_kUserAvatarSizeSmall / 2.0);
+    BorderRadius.circular(_kUserAvatarSizeSmall / 2.0);
 final BorderRadius _kButtonBorderRadiusLarge =
-    new BorderRadius.circular(_kUserAvatarSizeLarge / 2.0);
+    BorderRadius.circular(_kUserAvatarSizeLarge / 2.0);
 
 /// Shows the list of users and allows the user to add new users
 class UserList extends StatelessWidget {
@@ -42,12 +42,12 @@
     bool isSmall,
   }) {
     double size = isSmall ? _kUserAvatarSizeSmall : _kUserAvatarSizeLarge;
-    return new GestureDetector(
+    return GestureDetector(
       onTap: () => onTap?.call(),
-      child: new Container(
+      child: Container(
         height: size,
         width: size,
-        child: new Alphatar.fromNameAndUrl(
+        child: Alphatar.fromNameAndUrl(
           name: account.displayName,
           avatarUrl: _getImageUrl(account),
           size: size,
@@ -66,8 +66,8 @@
       onTap: () => onTap?.call(),
       width: size,
       isSmall: isSmall,
-      child: new Center(
-        child: new Icon(
+      child: Center(
+        child: Icon(
           icon,
           color: Colors.white,
           size: size / 2.0,
@@ -83,17 +83,17 @@
     double width,
     bool isDisabled = false,
   }) {
-    return new GestureDetector(
+    return GestureDetector(
       onTap: isDisabled ? null : () => onTap?.call(),
-      child: new Container(
+      child: Container(
         height: isSmall ? _kUserAvatarSizeSmall : _kUserAvatarSizeLarge,
         width: width ?? (isSmall ? _kButtonWidthSmall : _kButtonWidthLarge),
         alignment: FractionalOffset.center,
-        margin: const EdgeInsets.only(left: 16.0),
-        decoration: new BoxDecoration(
+        margin: EdgeInsets.only(left: 16.0),
+        decoration: BoxDecoration(
           borderRadius:
               isSmall ? _kButtonBorderRadiusPhone : _kButtonBorderRadiusLarge,
-          border: new Border.all(
+          border: Border.all(
             color: isDisabled ? Colors.grey : Colors.white,
             width: 1.0,
           ),
@@ -110,12 +110,12 @@
     double fontSize = isSmall ? _kButtonFontSizeSmall : _kButtonFontSizeLarge;
 
     if (loginDisabled) {
-      return new Row(
+      return Row(
         children: <Widget>[
           _buildUserActionButton(
-            child: new Text(
+            child: Text(
               'RESET',
-              style: new TextStyle(
+              style: TextStyle(
                 fontSize: fontSize,
                 color: Colors.white,
               ),
@@ -124,9 +124,9 @@
             isSmall: isSmall,
           ),
           _buildUserActionButton(
-            child: new Text(
+            child: Text(
               'WIFI',
-              style: new TextStyle(
+              style: TextStyle(
                 fontSize: fontSize,
                 color: Colors.white,
               ),
@@ -135,9 +135,9 @@
             isSmall: isSmall,
           ),
           _buildUserActionButton(
-            child: new Text(
+            child: Text(
               'LOGIN DISABLED => No SessionShell configured',
-              style: new TextStyle(
+              style: TextStyle(
                 fontSize: fontSize,
                 color: Colors.white,
               ),
@@ -149,7 +149,7 @@
         ],
       );
     }
-    return new Row(
+    return Row(
       children: <Widget>[
         _buildIconButton(
           onTap: () => model.hideUserActions(),
@@ -157,9 +157,9 @@
           icon: Icons.close,
         ),
         _buildUserActionButton(
-          child: new Text(
+          child: Text(
             'RESET',
-            style: new TextStyle(
+            style: TextStyle(
               fontSize: fontSize,
               color: Colors.white,
             ),
@@ -168,9 +168,9 @@
           isSmall: isSmall,
         ),
         _buildUserActionButton(
-          child: new Text(
+          child: Text(
             'WIFI',
-            style: new TextStyle(
+            style: TextStyle(
               fontSize: fontSize,
               color: Colors.white,
             ),
@@ -179,9 +179,9 @@
           isSmall: isSmall,
         ),
         _buildUserActionButton(
-          child: new Text(
+          child: Text(
             'LOGIN',
-            style: new TextStyle(
+            style: TextStyle(
               fontSize: fontSize,
               color: Colors.white,
             ),
@@ -194,9 +194,9 @@
           isSmall: isSmall,
         ),
         _buildUserActionButton(
-          child: new Text(
+          child: Text(
             'GUEST',
-            style: new TextStyle(
+            style: TextStyle(
               fontSize: fontSize,
               color: Colors.white,
             ),
@@ -218,7 +218,7 @@
     }
     Uri uri = Uri.parse(account.imageUrl);
     if (uri.queryParameters['sz'] != null) {
-      Map<String, dynamic> queryParameters = new Map<String, dynamic>.from(
+      Map<String, dynamic> queryParameters = Map<String, dynamic>.from(
         uri.queryParameters,
       );
       queryParameters['sz'] = '160';
@@ -244,11 +244,11 @@
       return userCard;
     }
 
-    Widget userImage = new LongPressDraggable<Account>(
+    Widget userImage = LongPressDraggable<Account>(
       child: userCard,
       feedback: userCard,
       data: account,
-      childWhenDragging: new Opacity(opacity: 0.0, child: userCard),
+      childWhenDragging: Opacity(opacity: 0.0, child: userCard),
       feedbackOffset: Offset.zero,
       dragAnchor: DragAnchor.child,
       maxSimultaneousDrags: 1,
@@ -257,14 +257,14 @@
     );
 
     if (model.showingUserActions) {
-      return new Padding(
-        padding: const EdgeInsets.only(left: 16.0),
-        child: new Column(
+      return Padding(
+        padding: EdgeInsets.only(left: 16.0),
+        child: Column(
           mainAxisAlignment: MainAxisAlignment.end,
           children: <Widget>[
-            new Padding(
-              padding: const EdgeInsets.only(bottom: 8.0),
-              child: new Text(
+            Padding(
+              padding: EdgeInsets.only(bottom: 8.0),
+              child: Text(
                 account.displayName,
                 textAlign: TextAlign.center,
                 maxLines: 1,
@@ -276,15 +276,15 @@
         ),
       );
     } else {
-      return new Padding(
-        padding: const EdgeInsets.only(left: 16.0),
+      return Padding(
+        padding: EdgeInsets.only(left: 16.0),
         child: userImage,
       );
     }
   }
 
   Widget _buildUserList(UserPickerBaseShellModel model) {
-    return new LayoutBuilder(
+    return LayoutBuilder(
       builder: (BuildContext context, BoxConstraints constraints) {
         List<Widget> children = <Widget>[];
 
@@ -293,7 +293,7 @@
 
         if (model.showingUserActions) {
           children.add(
-            new Align(
+            Align(
               alignment: FractionalOffset.bottomCenter,
               child: _buildExpandedUserActions(
                 model: model,
@@ -303,7 +303,7 @@
           );
         } else {
           children.add(
-            new Align(
+            Align(
               alignment: FractionalOffset.bottomCenter,
               child: _buildIconButton(
                 onTap: model.showUserActions,
@@ -316,7 +316,7 @@
 
         children.addAll(
           model.accounts.map(
-            (Account account) => new Align(
+            (Account account) => Align(
                   alignment: FractionalOffset.bottomCenter,
                   child: _buildUserEntry(
                     account: account,
@@ -332,21 +332,21 @@
           ),
         );
 
-        return new Container(
+        return Container(
           height: (isSmall ? _kUserAvatarSizeSmall : _kUserAvatarSizeLarge) +
               24.0 +
               (model.showingUserActions ? 24.0 : 0.0),
-          child: new AnimatedOpacity(
-            duration: const Duration(milliseconds: 250),
+          child: AnimatedOpacity(
+            duration: Duration(milliseconds: 250),
             opacity: model.showingRemoveUserTarget ? 0.0 : 1.0,
-            child: new ListView(
-              padding: const EdgeInsets.only(
+            child: ListView(
+              padding: EdgeInsets.only(
                 bottom: 24.0,
                 right: 24.0,
               ),
               scrollDirection: Axis.horizontal,
               reverse: true,
-              physics: const BouncingScrollPhysics(),
+              physics: BouncingScrollPhysics(),
               shrinkWrap: true,
               children: children,
             ),
@@ -358,26 +358,26 @@
 
   @override
   Widget build(BuildContext context) =>
-      new ScopedModelDescendant<UserPickerBaseShellModel>(builder: (
+      ScopedModelDescendant<UserPickerBaseShellModel>(builder: (
         BuildContext context,
         Widget child,
         UserPickerBaseShellModel model,
       ) {
         if (model.showingLoadingSpinner) {
-          return new Stack(
+          return Stack(
             fit: StackFit.passthrough,
             children: <Widget>[
-              new Center(
-                child: new Container(
+              Center(
+                child: Container(
                   width: 64.0,
                   height: 64.0,
-                  child: const FuchsiaSpinner(),
+                  child: FuchsiaSpinner(),
                 ),
               ),
             ],
           );
         } else {
-          return new Stack(
+          return Stack(
             fit: StackFit.passthrough,
             children: <Widget>[
               _buildUserList(model),
diff --git a/bin/userpicker_base_shell/lib/user_picker_base_shell_model.dart b/bin/userpicker_base_shell/lib/user_picker_base_shell_model.dart
index ceef118..b233781 100644
--- a/bin/userpicker_base_shell/lib/user_picker_base_shell_model.dart
+++ b/bin/userpicker_base_shell/lib/user_picker_base_shell_model.dart
@@ -21,7 +21,7 @@
 /// Function signature for GetPresentationMode callback
 typedef GetPresentationModeCallback = void Function(PresentationMode mode);
 
-const Duration _kShowLoadingSpinnerDelay = const Duration(milliseconds: 500);
+const Duration _kShowLoadingSpinnerDelay = Duration(milliseconds: 500);
 
 /// Model that provides common state
 class UserPickerBaseShellModel extends CommonBaseShellModel
@@ -76,7 +76,7 @@
 
   /// Call when reset is tapped.
   void resetTapped() {
-    File dm = new File('/dev/misc/dmctl');
+    File dm = File('/dev/misc/dmctl');
     print('dmctl exists? ${dm.existsSync()}');
     if (dm.existsSync()) {
       dm.writeAsStringSync('reboot', flush: true);
@@ -163,7 +163,7 @@
   void _updateShowLoadingSpinner() {
     if (accounts == null || _addingUser || _loadingChildView) {
       if (_showingLoadingSpinner == null) {
-        _showLoadingSpinnerTimer = new Timer(
+        _showLoadingSpinnerTimer = Timer(
           _kShowLoadingSpinnerDelay,
           () {
             _showingLoadingSpinner = true;
diff --git a/bin/userpicker_base_shell/lib/user_picker_base_shell_screen.dart b/bin/userpicker_base_shell/lib/user_picker_base_shell_screen.dart
index 159f8fa..c99d57d 100644
--- a/bin/userpicker_base_shell/lib/user_picker_base_shell_screen.dart
+++ b/bin/userpicker_base_shell/lib/user_picker_base_shell_screen.dart
@@ -22,7 +22,7 @@
   }) : super(key: key);
   @override
   Widget build(BuildContext context) {
-    return new ScopedModelDescendant<UserPickerBaseShellModel>(
+    return ScopedModelDescendant<UserPickerBaseShellModel>(
       builder: (
         BuildContext context,
         Widget child,
@@ -32,28 +32,28 @@
 
         if (model.childViewConnection == null || model.loadingChildView) {
           stackChildren.addAll(<Widget>[
-            new UserPickerScreen(),
-            new Align(
+            UserPickerScreen(),
+            Align(
               alignment: FractionalOffset.center,
-              child: new Offstage(
+              child: Offstage(
                 offstage: !model.showingClock,
-                child: new Clock(),
+                child: Clock(),
               ),
             ),
           ]);
         }
 
         if (model.childViewConnection != null) {
-          stackChildren.add(new Offstage(
-            child: new Container(
+          stackChildren.add(Offstage(
+            child: Container(
               color: Colors.black,
-              child: new ChildView(connection: model.childViewConnection),
+              child: ChildView(connection: model.childViewConnection),
             ),
             offstage: model.loadingChildView,
           ));
         }
 
-        return new Stack(fit: StackFit.expand, children: stackChildren);
+        return Stack(fit: StackFit.expand, children: stackChildren);
       },
     );
   }
diff --git a/bin/userpicker_base_shell/lib/user_picker_screen.dart b/bin/userpicker_base_shell/lib/user_picker_screen.dart
index 0a73bc0..144c05f 100644
--- a/bin/userpicker_base_shell/lib/user_picker_screen.dart
+++ b/bin/userpicker_base_shell/lib/user_picker_screen.dart
@@ -17,33 +17,33 @@
 class UserPickerScreen extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return new ScopedModelDescendant<UserPickerBaseShellModel>(
+    return ScopedModelDescendant<UserPickerBaseShellModel>(
       builder: (
         BuildContext context,
         Widget child,
         UserPickerBaseShellModel model,
       ) {
-        return new Material(
+        return Material(
           color: Colors.grey[900],
-          child: new Stack(
+          child: Stack(
             fit: StackFit.passthrough,
             children: <Widget>[
               /// Add user picker for selecting users and adding new users
-              new Align(
+              Align(
                 alignment: FractionalOffset.bottomRight,
-                child: new RepaintBoundary(
-                  child: new UserList(
+                child: RepaintBoundary(
+                  child: UserList(
                     loginDisabled: false,
                   ),
                 ),
               ),
 
               // Add user removal target
-              new Align(
+              Align(
                 alignment: FractionalOffset.center,
-                child: new RepaintBoundary(
-                  child: new Container(
-                    child: new DragTarget<Account>(
+                child: RepaintBoundary(
+                  child: Container(
+                    child: DragTarget<Account>(
                       onWillAccept: (Account data) => true,
                       onAccept: model.removeUser,
                       builder: (
@@ -51,7 +51,7 @@
                         List<Account> candidateData,
                         __,
                       ) =>
-                          new _UserRemovalTarget(
+                          _UserRemovalTarget(
                             show: model.showingRemoveUserTarget,
                             grow: candidateData.isNotEmpty,
                           ),
@@ -79,7 +79,7 @@
   const _UserRemovalTarget({this.show, this.grow});
 
   @override
-  _UserRemovalTargetState createState() => new _UserRemovalTargetState();
+  _UserRemovalTargetState createState() => _UserRemovalTargetState();
 }
 
 class _UserRemovalTargetState extends State<_UserRemovalTarget>
@@ -93,24 +93,24 @@
   @override
   void initState() {
     super.initState();
-    _masterAnimationController = new AnimationController(
+    _masterAnimationController = AnimationController(
       vsync: this,
-      duration: const Duration(milliseconds: 500),
+      duration: Duration(milliseconds: 500),
     );
-    _initialScaleController = new AnimationController(
+    _initialScaleController = AnimationController(
       vsync: this,
-      duration: const Duration(milliseconds: 250),
+      duration: Duration(milliseconds: 250),
     );
-    _initialScaleCurvedAnimation = new CurvedAnimation(
+    _initialScaleCurvedAnimation = CurvedAnimation(
       parent: _initialScaleController,
       curve: Curves.fastOutSlowIn,
       reverseCurve: Curves.fastOutSlowIn,
     );
-    _scaleController = new AnimationController(
+    _scaleController = AnimationController(
       vsync: this,
-      duration: const Duration(milliseconds: 250),
+      duration: Duration(milliseconds: 250),
     );
-    _scaleCurvedAnimation = new CurvedAnimation(
+    _scaleCurvedAnimation = CurvedAnimation(
       parent: _scaleController,
       curve: Curves.fastOutSlowIn,
       reverseCurve: Curves.fastOutSlowIn,
@@ -154,32 +154,32 @@
   }
 
   @override
-  Widget build(BuildContext context) => new Container(
-        child: new AnimatedBuilder(
+  Widget build(BuildContext context) => Container(
+        child: AnimatedBuilder(
           animation: _masterAnimationController,
-          builder: (BuildContext context, Widget child) => new Transform(
+          builder: (BuildContext context, Widget child) => Transform(
                 alignment: FractionalOffset.center,
-                transform: new Matrix4.identity().scaled(
+                transform: Matrix4.identity().scaled(
                   lerpDouble(1.0, 0.7, _scaleCurvedAnimation.value) *
                       _initialScaleCurvedAnimation.value,
                   lerpDouble(1.0, 0.7, _scaleCurvedAnimation.value) *
                       _initialScaleCurvedAnimation.value,
                 ),
-                child: new Container(
+                child: Container(
                   width: _kRemovalTargetSize,
                   height: _kRemovalTargetSize,
-                  decoration: new BoxDecoration(
+                  decoration: BoxDecoration(
                     borderRadius:
-                        new BorderRadius.circular(_kRemovalTargetSize / 2.0),
-                    border: new Border.all(color: Colors.white.withAlpha(200)),
+                        BorderRadius.circular(_kRemovalTargetSize / 2.0),
+                    border: Border.all(color: Colors.white.withAlpha(200)),
                     color: Colors.white.withAlpha(
                         lerpDouble(0, 100.0, _scaleCurvedAnimation.value)
                             .toInt()),
                   ),
                   child: Center(
-                    child: const Text(
+                    child: Text(
                       'REMOVE',
-                      style: const TextStyle(
+                      style: TextStyle(
                         color: Colors.white,
                         fontSize: 16.0,
                       ),
diff --git a/bin/wifi_settings/lib/main.dart b/bin/wifi_settings/lib/main.dart
index 471f048..8628204 100644
--- a/bin/wifi_settings/lib/main.dart
+++ b/bin/wifi_settings/lib/main.dart
@@ -13,11 +13,11 @@
 void main() {
   setupLogger(name: 'wifi_settings');
 
-  Widget app = new MaterialApp(
-    home: new Container(
-      child: new ScopedModel<WifiSettingsModel>(
-        model: new WifiSettingsModel(),
-        child: const WlanManager(),
+  Widget app = MaterialApp(
+    home: Container(
+      child: ScopedModel<WifiSettingsModel>(
+        model: WifiSettingsModel(),
+        child: WlanManager(),
       ),
     ),
   );
diff --git a/bin/wifi_settings/lib/src/fuchsia/wifi_settings_model.dart b/bin/wifi_settings/lib/src/fuchsia/wifi_settings_model.dart
index 15a2c59..97afdd7 100644
--- a/bin/wifi_settings/lib/src/fuchsia/wifi_settings_model.dart
+++ b/bin/wifi_settings/lib/src/fuchsia/wifi_settings_model.dart
@@ -21,10 +21,10 @@
 /// All subclasses must connect the [wlan.WlanProxy] in their constructor
 class WifiSettingsModel extends Model {
   /// How often to poll the wlan for wifi information.
-  final Duration _updatePeriod = const Duration(seconds: 3);
+  final Duration _updatePeriod = Duration(seconds: 3);
 
   /// How often to poll the wlan for available wifi networks.
-  final Duration _scanPeriod = const Duration(seconds: 40);
+  final Duration _scanPeriod = Duration(seconds: 40);
 
   final wlan.WlanProxy _wlanProxy = wlan.WlanProxy();
 
diff --git a/bin/xi/xi_embeddable/lib/main.dart b/bin/xi/xi_embeddable/lib/main.dart
index a72b338..f6df1e3 100644
--- a/bin/xi/xi_embeddable/lib/main.dart
+++ b/bin/xi/xi_embeddable/lib/main.dart
@@ -45,7 +45,7 @@
   }).catchError(
       (err, trace) => log.severe('failed to get link or agent', err, trace));
 
-  runApp(new EmbeddedEditor(
+  runApp(EmbeddedEditor(
     client: client,
     debugBackground: kDrawDebugBackground,
   ));
diff --git a/bin/xi/xi_mod/lib/main.dart b/bin/xi/xi_mod/lib/main.dart
index 67162ba..b3cd60f 100644
--- a/bin/xi/xi_mod/lib/main.dart
+++ b/bin/xi/xi_mod/lib/main.dart
@@ -22,10 +22,10 @@
   //TODO: migrate to using intents
   Module().registerIntentHandler(NoopIntentHandler());
 
-  XiFuchsiaClient xi = new XiFuchsiaClient(null);
-  XiCoreProxy coreProxy = new CoreProxy(xi);
+  XiFuchsiaClient xi = XiFuchsiaClient(null);
+  XiCoreProxy coreProxy = CoreProxy(xi);
 
-  runApp(new EditorTabs(
+  runApp(EditorTabs(
     coreProxy: coreProxy,
     debugBackground: kDrawDebugBackground,
   ));
diff --git a/bin/xi/xi_session_agent/lib/main.dart b/bin/xi/xi_session_agent/lib/main.dart
index b8652c8..615e9d8 100644
--- a/bin/xi/xi_session_agent/lib/main.dart
+++ b/bin/xi/xi_session_agent/lib/main.dart
@@ -132,7 +132,7 @@
 
 class ViewForwarder extends XiClient implements XiRpcHandler {
   final Socket _socket;
-  final SocketReader _reader = new SocketReader();
+  final SocketReader _reader = SocketReader();
   final String viewId;
   final XiClient core;
 
@@ -153,13 +153,13 @@
   @override
   void send(String data) {
     final List<int> ints = utf8.encode('$data\n');
-    final Uint8List bytes = new Uint8List.fromList(ints);
+    final Uint8List bytes = Uint8List.fromList(ints);
     final ByteData buffer = bytes.buffer.asByteData();
 
     final WriteResult result = _reader.socket.write(buffer);
 
     if (result.status != ZX.OK) {
-      StateError error = new StateError('ERROR WRITING: $result');
+      StateError error = StateError('ERROR WRITING: $result');
       streamController
         ..addError(error)
         ..close();
@@ -171,7 +171,7 @@
     final ReadResult result = _reader.socket.read(1000);
 
     if (result.status != ZX.OK) {
-      StateError error = new StateError('Socket read error: ${result.status}');
+      StateError error = StateError('Socket read error: ${result.status}');
       streamController
         ..addError(error)
         ..close();
diff --git a/bin/xi/xi_session_demo/lib/main.dart b/bin/xi/xi_session_demo/lib/main.dart
index 4368c74..aad7fd5 100644
--- a/bin/xi/xi_session_demo/lib/main.dart
+++ b/bin/xi/xi_session_demo/lib/main.dart
@@ -22,7 +22,7 @@
 
   DemoModel model = DemoModel();
 
-  runApp(new ScopedModel<DemoModel>(
+  runApp(ScopedModel<DemoModel>(
     model: model,
     child: MessagesDemo(),
   ));
diff --git a/bin/xi/xi_session_demo/lib/src/demo_model.dart b/bin/xi/xi_session_demo/lib/src/demo_model.dart
index d66cf80..e28ea69 100644
--- a/bin/xi/xi_session_demo/lib/src/demo_model.dart
+++ b/bin/xi/xi_session_demo/lib/src/demo_model.dart
@@ -22,7 +22,7 @@
     'Hello!',
     'This is pretending to be a messaging app.',
     'Press "+" to open a compose view',
-    'Then press "send" to add a new message.',
+    'Then press "send" to add a message.',
   ];
 
   final _sessionManagerProxy = XiSessionManagerProxy();
diff --git a/bin/xi/xi_session_demo/lib/src/demo_widget.dart b/bin/xi/xi_session_demo/lib/src/demo_widget.dart
index 7f00767..6f56f54 100644
--- a/bin/xi/xi_session_demo/lib/src/demo_widget.dart
+++ b/bin/xi/xi_session_demo/lib/src/demo_widget.dart
@@ -50,8 +50,8 @@
             floatingActionButton: FloatingActionButton(
                 child: Text('Send'), onPressed: () => model.sendButtonAction()),
             body: model.editorConn != null
-                ? new ChildView(connection: model.editorConn)
-                : new Placeholder(),
+                ? ChildView(connection: model.editorConn)
+                : Placeholder(),
           ),
         ),
       ),
diff --git a/examples/eddystone_agent/main.dart b/examples/eddystone_agent/main.dart
index d976cf9..1c32cd6 100644
--- a/examples/eddystone_agent/main.dart
+++ b/examples/eddystone_agent/main.dart
@@ -15,16 +15,16 @@
 import 'package:lib.module_resolver.dart/intent_builder.dart';
 import 'package:lib.proposal.dart/proposal.dart';
 
-final ProposalPublisherProxy _proposalPublisher = new ProposalPublisherProxy();
-final StartupContext _context = new StartupContext.fromStartupInfo();
+final ProposalPublisherProxy _proposalPublisher = ProposalPublisherProxy();
+final StartupContext _context = StartupContext.fromStartupInfo();
 
 final ble.CentralDelegateBinding _delegateBinding =
-    new ble.CentralDelegateBinding();
-final ble.CentralProxy _central = new ble.CentralProxy();
+    ble.CentralDelegateBinding();
+final ble.CentralProxy _central = ble.CentralProxy();
 
 const String kEddystoneUuid = '0000feaa-0000-1000-8000-00805f9b34fb';
 
-final Set<String> proposed = new Set<String>();
+final Set<String> proposed = Set<String>();
 
 Future<Null> proposeUrl(String url) async {
   // TODO(jamuraa): resolve this URL for a title or more info?
@@ -38,8 +38,8 @@
     details: 'Eddystone nearby webpage detected',
     color: 0xFF0000FF,
     actions: <Action>[
-      new Action.withCreateStory(
-        new CreateStory(intent: new IntentBuilder.handler(url).intent),
+      Action.withCreateStory(
+        CreateStory(intent: IntentBuilder.handler(url).intent),
       )
     ],
   ));
@@ -55,13 +55,13 @@
   if (encoded.length < 2) {
     return null;
   }
-  const Map<int, String> prefixes = const {
+  const Map<int, String> prefixes = {
     0: 'http://www.',
     1: 'https://www.',
     2: 'http://',
     3: 'https://',
   };
-  const Map<int, String> expansions = const {
+  const Map<int, String> expansions = {
     0: '.com/',
     1: '.org/',
     2: '.edu/',
@@ -82,12 +82,12 @@
     log.warning('Eddystone-URL has invalid scheme: ${encoded.first}');
     return null;
   }
-  StringBuffer buffer = new StringBuffer(decoded);
+  StringBuffer buffer = StringBuffer(decoded);
   for (final int c in encoded.skip(1)) {
     if ((c < 0x20) || (c > 0x7F)) {
       buffer.write(expansions[c]);
     } else {
-      buffer.write(new String.fromCharCode(c));
+      buffer.write(String.fromCharCode(c));
     }
   }
   return buffer.toString();
@@ -98,13 +98,13 @@
 
   void start(ble.Central central) {
     ble.ScanFilter filter =
-        const ble.ScanFilter(serviceUuids: const [kEddystoneUuid]);
+        const ble.ScanFilter(serviceUuids: [kEddystoneUuid]);
     log.info('BLE starting scan for Eddystone beacons');
     central.startScan(filter, (bt.Status status) {
       if (status.error != null) {
         log.warning(
             'BLE scan start failed: ${status.error.description}, retry in $_delayMinutes mins');
-        new Timer(new Duration(minutes: _delayMinutes), () => start(_central));
+        Timer(Duration(minutes: _delayMinutes), () => start(_central));
         _delayMinutes *= 2;
         if (_delayMinutes > 60) {
           _delayMinutes = 60;
@@ -165,7 +165,7 @@
   connectToService(_context.environmentServices, _proposalPublisher.ctrl);
   connectToService(_context.environmentServices, _central.ctrl);
 
-  var scanner = new EddystoneScanner();
+  var scanner = EddystoneScanner();
   _central.setDelegate(_delegateBinding.wrap(scanner));
 
   scanner.start(_central);
diff --git a/examples/fidl/echo_client_dart/lib/main.dart b/examples/fidl/echo_client_dart/lib/main.dart
index 06d10a0..996d979 100644
--- a/examples/fidl/echo_client_dart/lib/main.dart
+++ b/examples/fidl/echo_client_dart/lib/main.dart
@@ -15,14 +15,14 @@
     server = args[1];
   }
 
-  _context = new StartupContext.fromStartupInfo();
+  _context = StartupContext.fromStartupInfo();
 
-  final Services services = new Services();
+  final Services services = Services();
   final LaunchInfo launchInfo =
-      new LaunchInfo(url: server, directoryRequest: services.request());
+      LaunchInfo(url: server, directoryRequest: services.request());
   _context.launcher.createComponent(launchInfo, null);
 
-  _echo = new EchoProxy();
+  _echo = EchoProxy();
   _echo.ctrl.bind(services.connectToServiceByName<Echo>(Echo.$serviceName));
 
   _echo.echoString('hello', (String response) {
diff --git a/examples/fidl/echo_server_dart/lib/main.dart b/examples/fidl/echo_server_dart/lib/main.dart
index dac1637..f920fee 100644
--- a/examples/fidl/echo_server_dart/lib/main.dart
+++ b/examples/fidl/echo_server_dart/lib/main.dart
@@ -9,7 +9,7 @@
 bool quiet = false;
 
 class _EchoImpl extends Echo {
-  final EchoBinding _binding = new EchoBinding();
+  final EchoBinding _binding = EchoBinding();
 
   void bind(InterfaceRequest<Echo> request) {
     _binding.bind(this, request);
@@ -29,8 +29,8 @@
 
 void main(List<String> args) {
   quiet = args.contains('-q');
-  _context = new StartupContext.fromStartupInfo();
-  _echo = new _EchoImpl();
+  _context = StartupContext.fromStartupInfo();
+  _echo = _EchoImpl();
   _context.outgoingServices
       .addServiceForName<Echo>(_echo.bind, Echo.$serviceName);
 }
diff --git a/examples/fidl/fidl_bindings_performance/lib/main.dart b/examples/fidl/fidl_bindings_performance/lib/main.dart
index cee89e4..ac6bbb9 100644
--- a/examples/fidl/fidl_bindings_performance/lib/main.dart
+++ b/examples/fidl/fidl_bindings_performance/lib/main.dart
@@ -24,17 +24,17 @@
 const String kMessage = 'hello';
 
 Future<int> runTest(String server, void ready(Echo echo, void complete())) {
-  final EchoProxy echo = new EchoProxy();
-  final ComponentControllerProxy controller = new ComponentControllerProxy();
-  final Services services = new Services();
-  final LaunchInfo launchInfo = new LaunchInfo(
+  final EchoProxy echo = EchoProxy();
+  final ComponentControllerProxy controller = ComponentControllerProxy();
+  final Services services = Services();
+  final LaunchInfo launchInfo = LaunchInfo(
       url: server,
       arguments: <String>['-q'],
       directoryRequest: services.request());
   _context.launcher.createComponent(launchInfo, controller.ctrl.request());
   echo.ctrl.bind(services.connectToServiceByName<Echo>(Echo.$serviceName));
 
-  final Completer<int> completer = new Completer<int>();
+  final Completer<int> completer = Completer<int>();
 
   // Notice if the echo server or its controller goes away.
   echo.ctrl.onConnectionError = () {
@@ -50,7 +50,7 @@
 
   // Wait until the echo server is up and replying to messages.
   echo.echoString(kMessage, (String response) {
-    final Stopwatch stopwatch = new Stopwatch()..start();
+    final Stopwatch stopwatch = Stopwatch()..start();
     void done() {
       stopwatch.stop();
       void complete() {
@@ -119,7 +119,7 @@
 }
 
 void main(List<String> argv) async {
-  final parser = new ArgParser()
+  final parser = ArgParser()
     ..addMultiOption('server', abbr: 's', defaultsTo: kDefaultServers)
     ..addMultiOption('num-calls',
         abbr: 'n', defaultsTo: kDefaultCalls.map((i) => i.toString()))
@@ -133,7 +133,7 @@
   final PerfTest perfTest =
       args['parallel'] ? testParallelPerf : testSerialPerf;
 
-  _context = new StartupContext.fromStartupInfo();
+  _context = StartupContext.fromStartupInfo();
 
   // Map of server to map of count to total microseconds.
   final Map<String, Map<int, int>> results = {};
@@ -157,7 +157,7 @@
 
   print('server,${numCalls.join(',')}');
   for (final String server in results.keys) {
-    StringBuffer line = new StringBuffer(server);
+    StringBuffer line = StringBuffer(server);
     for (final int count in numCalls) {
       final int microseconds = results[server][count] ?? 0;
       line.write(',${(microseconds / count)}');
diff --git a/examples/ledger/todo_list/lib/main.dart b/examples/ledger/todo_list/lib/main.dart
index 2eb039f..5e0f640 100644
--- a/examples/ledger/todo_list/lib/main.dart
+++ b/examples/ledger/todo_list/lib/main.dart
@@ -17,7 +17,7 @@
 void main() {
   setupLogger(name: 'Todo List');
 
-  final model = new TodoListModel()..connect(_getComponentContext());
+  final model = TodoListModel()..connect(_getComponentContext());
 
   // We don't support intents in this module so explicitly ignore them.
   Module().registerIntentHandler(NoopIntentHandler());
@@ -26,7 +26,7 @@
 
   runApp(
     MaterialApp(
-      home: new ScopedModel<TodoListModel>(
+      home: ScopedModel<TodoListModel>(
         model: model,
         child: TodoListModuleScreen(
           onNewItem: model.addItem,
diff --git a/examples/ledger/todo_list/lib/src/models/todo_list_model.dart b/examples/ledger/todo_list/lib/src/models/todo_list_model.dart
index eee3b2a..a5f0ce1 100644
--- a/examples/ledger/todo_list/lib/src/models/todo_list_model.dart
+++ b/examples/ledger/todo_list/lib/src/models/todo_list_model.dart
@@ -47,7 +47,7 @@
     final snapshot = ledger.PageSnapshotProxy();
     await _page.getSnapshotNew(
       snapshot.ctrl.request(),
-      new Uint8List(0),
+      Uint8List(0),
       _pageWatcherBinding.wrap(_PageWatcher(this)),
     );
     _readItems(snapshot);
@@ -82,7 +82,7 @@
   }
 
   Uint8List _makeKey() {
-    Uint8List key = new Uint8List(16);
+    Uint8List key = Uint8List(16);
     for (int i = 0; i < 16; i++) {
       key[i] = _random.nextInt(256);
     }
diff --git a/examples/ledger/todo_list/lib/src/widgets/new_item_input.dart b/examples/ledger/todo_list/lib/src/widgets/new_item_input.dart
index bb5c803..af19406 100644
--- a/examples/ledger/todo_list/lib/src/widgets/new_item_input.dart
+++ b/examples/ledger/todo_list/lib/src/widgets/new_item_input.dart
@@ -16,31 +16,31 @@
   const NewItemInput({Key key, this.onNewItem}) : super(key: key);
 
   @override
-  _NewItemInputState createState() => new _NewItemInputState(onNewItem);
+  _NewItemInputState createState() => _NewItemInputState(onNewItem);
 }
 
 class _NewItemInputState extends State<NewItemInput> {
   _NewItemInputState(this.onNewItem);
 
-  final TextEditingController _controller = new TextEditingController();
+  final TextEditingController _controller = TextEditingController();
   final NewItemCallback onNewItem;
 
   @override
   Widget build(BuildContext context) {
-    return new Row(children: <Widget>[
-      new Expanded(
-          child: new TextField(
+    return Row(children: <Widget>[
+      Expanded(
+          child: TextField(
               controller: _controller,
               onSubmitted: (String value) {
                 onNewItem(_controller.text);
                 _controller.text = '';
               },
-              decoration: const InputDecoration(
+              decoration: InputDecoration(
                   hintText: 'What would you like to achieve today?'))),
-      new SizedBox(
+      SizedBox(
           width: 72.0,
-          child: new IconButton(
-              icon: const Icon(Icons.add),
+          child: IconButton(
+              icon: Icon(Icons.add),
               onPressed: () {
                 onNewItem(_controller.text);
                 _controller.text = '';
diff --git a/examples/ledger/todo_list/lib/src/widgets/todo_list_module_screen.dart b/examples/ledger/todo_list/lib/src/widgets/todo_list_module_screen.dart
index 3552e95..e685a1d 100644
--- a/examples/ledger/todo_list/lib/src/widgets/todo_list_module_screen.dart
+++ b/examples/ledger/todo_list/lib/src/widgets/todo_list_module_screen.dart
@@ -20,19 +20,19 @@
     final ThemeData themeData = Theme.of(context);
 
     List<Widget> rowChildren = <Widget>[
-      new Expanded(child: new Text(content)),
-      new SizedBox(
+      Expanded(child: Text(content)),
+      SizedBox(
         width: 72.0,
-        child: new IconButton(
-          icon: const Icon(Icons.done),
+        child: IconButton(
+          icon: Icon(Icons.done),
           color: themeData.primaryColor,
           onPressed: onDone,
         ),
       ),
     ];
-    return new Padding(
-      padding: const EdgeInsets.symmetric(vertical: 16.0),
-      child: new Row(
+    return Padding(
+      padding: EdgeInsets.symmetric(vertical: 16.0),
+      child: Row(
           mainAxisAlignment: MainAxisAlignment.spaceBetween,
           children: rowChildren),
     );
@@ -58,15 +58,15 @@
 
   @override
   Widget build(BuildContext context) {
-    return new Scaffold(
-      body: new ScopedModelDescendant<TodoListModel>(builder: (
+    return Scaffold(
+      body: ScopedModelDescendant<TodoListModel>(builder: (
         BuildContext context,
         Widget child,
         TodoListModel model,
       ) {
         List<Widget> listItems = <Widget>[];
         model.items.forEach((List<int> key, String value) {
-          listItems.add(new _TodoItem(
+          listItems.add(_TodoItem(
             content: value,
             onDone: () {
               onItemDone(key);
@@ -75,18 +75,18 @@
         });
 
         List<Widget> slivers = <Widget>[
-          new SliverAppBar(
+          SliverAppBar(
             expandedHeight: _appBarHeight,
             pinned: true,
-            flexibleSpace: const FlexibleSpaceBar(
-              title: const Text('Todo List'),
+            flexibleSpace: FlexibleSpaceBar(
+              title: Text('Todo List'),
             ),
           ),
-          new SliverToBoxAdapter(child: new NewItemInput(onNewItem: onNewItem)),
-          new SliverList(delegate: new SliverChildListDelegate(listItems))
+          SliverToBoxAdapter(child: NewItemInput(onNewItem: onNewItem)),
+          SliverList(delegate: SliverChildListDelegate(listItems))
         ];
 
-        return new Material(child: new CustomScrollView(slivers: slivers));
+        return Material(child: CustomScrollView(slivers: slivers));
       }),
     );
   }
diff --git a/examples/ledger/todo_list_sledge/lib/widgets/todo_item_widget.dart b/examples/ledger/todo_list_sledge/lib/widgets/todo_item_widget.dart
index d268b98..4f8ebd4 100644
--- a/examples/ledger/todo_list_sledge/lib/widgets/todo_item_widget.dart
+++ b/examples/ledger/todo_list_sledge/lib/widgets/todo_item_widget.dart
@@ -24,17 +24,17 @@
 
   @override
   Widget build(BuildContext context) {
-    TextField title = new TextField(
-        decoration: new InputDecoration(
+    TextField title = TextField(
+        decoration: InputDecoration(
       hintText: _todoItem._title,
     ));
 
-    RaisedButton deleteButton = new RaisedButton(
-        child: const Text('Delete'),
+    RaisedButton deleteButton = RaisedButton(
+        child: Text('Delete'),
         onPressed: _handleDeleteButtonBeingPressed);
 
-    List<Widget> children = <Widget>[new Flexible(child: title), deleteButton];
+    List<Widget> children = <Widget>[Flexible(child: title), deleteButton];
 
-    return new Row(children: children);
+    return Row(children: children);
   }
 }
diff --git a/examples/ledger/todo_list_sledge/lib/widgets/todo_list_widget.dart b/examples/ledger/todo_list_sledge/lib/widgets/todo_list_widget.dart
index 7f6ba02..5d4b734 100644
--- a/examples/ledger/todo_list_sledge/lib/widgets/todo_list_widget.dart
+++ b/examples/ledger/todo_list_sledge/lib/widgets/todo_list_widget.dart
@@ -12,14 +12,14 @@
   Widget build(BuildContext context) {
     // TODO: Retrieve the list of items from Sledge.
     final List<TodoItem> todoItems = <TodoItem>[]
-      ..add(new TodoItem('foo'))
-      ..add(new TodoItem('bar'))
-      ..add(new TodoItem('baz'));
+      ..add(TodoItem('foo'))
+      ..add(TodoItem('bar'))
+      ..add(TodoItem('baz'));
 
-    return new ListView(
+    return ListView(
         shrinkWrap: true,
         children: todoItems
-            .map((TodoItem todoItem) => new TodoItemWidget(todoItem))
+            .map((TodoItem todoItem) => TodoItemWidget(todoItem))
             .toList());
   }
 }
diff --git a/examples/ledger/todo_list_sledge/lib/widgets/todo_widget.dart b/examples/ledger/todo_list_sledge/lib/widgets/todo_widget.dart
index 6c2e6f1..cba0a0f 100644
--- a/examples/ledger/todo_list_sledge/lib/widgets/todo_widget.dart
+++ b/examples/ledger/todo_list_sledge/lib/widgets/todo_widget.dart
@@ -10,8 +10,8 @@
 class TodoWidget extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return new Scaffold(
-        appBar: new AppBar(title: const Text('Sledge example')),
-        body: new TodoListWidget());
+    return Scaffold(
+        appBar: AppBar(title: Text('Sledge example')),
+        body: TodoListWidget());
   }
 }
diff --git a/examples/mediaplayer/mediaplayer_flutter/lib/config.dart b/examples/mediaplayer/mediaplayer_flutter/lib/config.dart
index 7715711..0b34451 100644
--- a/examples/mediaplayer/mediaplayer_flutter/lib/config.dart
+++ b/examples/mediaplayer/mediaplayer_flutter/lib/config.dart
@@ -10,10 +10,10 @@
 
 /// Reads the configuration from [fileName].
 Future<List<Asset>> readConfig(String fileName) async {
-  File file = new File(fileName);
+  File file = File(fileName);
 
   if (!file.existsSync()) {
-    throw new ArgumentError.value(fileName, 'fileName', 'File does not exist');
+    throw ArgumentError.value(fileName, 'fileName', 'File does not exist');
   }
 
   return _convertAssetList(json.decode(await file.readAsString()));
@@ -58,7 +58,7 @@
         try {
           uri = Uri.parse(_convertString(value));
         } on FormatException {
-          throw new FormatException('Config file is malformed: bad URI $value');
+          throw FormatException('Config file is malformed: bad URI $value');
         }
         break;
       case 'type':
@@ -73,7 +73,7 @@
             type = AssetType.playlist;
             break;
           default:
-            throw new FormatException(
+            throw FormatException(
                 'Config file is malformed: $value is not a valid type');
         }
         break;
@@ -118,7 +118,7 @@
     case AssetType.movie:
       _checkNotNull(type, uri, 'a URI');
       _checkNull(type, children, 'children');
-      return new Asset.movie(
+      return Asset.movie(
         uri: uri,
         title: title,
         artist: artist,
@@ -129,7 +129,7 @@
     case AssetType.song:
       _checkNotNull(type, uri, 'a URI');
       _checkNull(type, children, 'children');
-      return new Asset.song(
+      return Asset.song(
         uri: uri,
         title: title,
         artist: artist,
@@ -151,27 +151,27 @@
         throw const FormatException(
             'Config file is malformed: playlist children must be songs or movies');
       }
-      return new Asset.playlist(
+      return Asset.playlist(
         title: title,
         children: children,
         loop: loop,
       );
 
     default:
-      throw new FormatException('Unknown asset type: $type');
+      throw FormatException('Unknown asset type: $type');
   }
 }
 
 void _checkNotNull(AssetType type, Object value, String name) {
   if (value == null) {
-    throw new FormatException(
+    throw FormatException(
         'Config file is malformed: a $type must have $name');
   }
 }
 
 void _checkNull(AssetType type, Object value, String name) {
   if (value != null) {
-    throw new FormatException(
+    throw FormatException(
         'Config file is malformed: a $type must not have $name');
   }
 }
diff --git a/examples/mediaplayer/mediaplayer_flutter/lib/main.dart b/examples/mediaplayer/mediaplayer_flutter/lib/main.dart
index a307bde..7b67c6c 100644
--- a/examples/mediaplayer/mediaplayer_flutter/lib/main.dart
+++ b/examples/mediaplayer/mediaplayer_flutter/lib/main.dart
@@ -19,11 +19,11 @@
 import 'asset.dart';
 import 'config.dart';
 
-final StartupContext _context = new StartupContext.fromStartupInfo();
+final StartupContext _context = StartupContext.fromStartupInfo();
 final MediaPlayerController _controller =
-    new MediaPlayerController(_context.environmentServices);
+    MediaPlayerController(_context.environmentServices);
 
-ModuleImpl _module = new ModuleImpl();
+ModuleImpl _module = ModuleImpl();
 
 void _log(String msg) {
   print('[mediaplayer_flutter Module] $msg');
@@ -32,7 +32,7 @@
 /// An implementation of the [Lifecycle] interface, which controls the lifetime
 /// of the module.
 class ModuleImpl implements Lifecycle {
-  final LifecycleBinding _lifecycleBinding = new LifecycleBinding();
+  final LifecycleBinding _lifecycleBinding = LifecycleBinding();
 
   /// Binds an [InterfaceRequest] for a [Lifecycle] interface to this object.
   void bindLifecycle(InterfaceRequest<Lifecycle> request) {
@@ -48,7 +48,7 @@
   }
 }
 
-const List<String> _configFileNames = const <String>[
+const List<String> _configFileNames = <String>[
   '/data/mediaplayer_flutter.config',
   '/pkg/data/mediaplayer_flutter.config',
 ];
@@ -140,7 +140,7 @@
   const _PlaybackScreen({Key key}) : super(key: key);
 
   @override
-  _PlaybackScreenState createState() => new _PlaybackScreenState();
+  _PlaybackScreenState createState() => _PlaybackScreenState();
 }
 
 class _PlaybackScreenState extends State<_PlaybackScreen> {
@@ -171,11 +171,11 @@
       return;
     }
 
-    to.add(new Container(
-      margin: const EdgeInsets.only(left: 10.0),
-      child: new Text(
+    to.add(Container(
+      margin: EdgeInsets.only(left: 10.0),
+      child: Text(
         label,
-        style: new TextStyle(color: color, fontSize: fontSize),
+        style: TextStyle(color: color, fontSize: fontSize),
       ),
     ));
   }
@@ -225,7 +225,7 @@
   @override
   Widget build(BuildContext context) {
     List<Widget> columnChildren = <Widget>[
-      new MediaPlayer(_controller),
+      MediaPlayer(_controller),
     ];
 
     Map<String, String> metadata = _controller.metadata;
@@ -251,30 +251,30 @@
 
     _addProblem(columnChildren);
 
-    return new Material(
+    return Material(
       color: Colors.black,
-      child: new Stack(
+      child: Stack(
         children: <Widget>[
-          new Positioned(
+          Positioned(
             left: 0.0,
             right: 0.0,
             top: 0.0,
-            child: new Column(
+            child: Column(
               crossAxisAlignment: CrossAxisAlignment.stretch,
               children: columnChildren,
             ),
           ),
-          new Positioned(
+          Positioned(
             right: 0.0,
             top: 0.0,
-            child: new Offstage(
+            child: Offstage(
               offstage: !_controller.shouldShowControlOverlay,
-              child: new PhysicalModel(
+              child: PhysicalModel(
                 elevation: 2.0,
                 color: Colors.transparent,
-                borderRadius: new BorderRadius.circular(60.0),
-                child: new IconButton(
-                  icon: new Icon(
+                borderRadius: BorderRadius.circular(60.0),
+                child: IconButton(
+                  icon: Icon(
                       _assets.length == 1 ? Icons.close : Icons.arrow_back),
                   iconSize: 60.0,
                   onPressed: () {
@@ -302,7 +302,7 @@
   const _ChooserScreen({Key key}) : super(key: key);
 
   @override
-  _ChooserScreenState createState() => new _ChooserScreenState();
+  _ChooserScreenState createState() => _ChooserScreenState();
 }
 
 class _ChooserScreenState extends State<_ChooserScreen> {
@@ -321,34 +321,34 @@
         break;
     }
 
-    return new RaisedButton(
+    return RaisedButton(
       onPressed: () {
         _play(asset);
         Navigator.of(context).pushNamed('/play');
       },
       color: Colors.black,
-      child: new Row(
+      child: Row(
         children: <Widget>[
-          new Icon(
+          Icon(
             iconData,
             size: 60.0,
             color: Colors.grey[200],
           ),
-          new Column(
+          Column(
             mainAxisAlignment: MainAxisAlignment.center,
             crossAxisAlignment: CrossAxisAlignment.start,
             children: <Widget>[
-              new Text(
+              Text(
                 asset.title ?? '(no title)',
-                style: new TextStyle(color: Colors.grey[200], fontSize: 18.0),
+                style: TextStyle(color: Colors.grey[200], fontSize: 18.0),
               ),
-              new Text(
+              Text(
                 asset.artist ?? '',
-                style: new TextStyle(color: Colors.grey[600], fontSize: 13.0),
+                style: TextStyle(color: Colors.grey[600], fontSize: 13.0),
               ),
-              new Text(
+              Text(
                 asset.album ?? '',
-                style: new TextStyle(color: Colors.grey[800], fontSize: 13.0),
+                style: TextStyle(color: Colors.grey[800], fontSize: 13.0),
               ),
             ],
           ),
@@ -359,22 +359,22 @@
 
   @override
   Widget build(BuildContext context) {
-    return new Material(
+    return Material(
       color: Colors.black,
-      child: new Stack(
+      child: Stack(
         children: <Widget>[
-          new ListView(
+          ListView(
             itemExtent: 75.0,
             children: _assets.map(_buildChooseButton).toList(),
           ),
-          new Positioned(
+          Positioned(
             right: 0.0,
             top: 0.0,
-            child: new PhysicalModel(
+            child: PhysicalModel(
               elevation: 2.0,
               color: Colors.transparent,
-              child: new IconButton(
-                icon: const Icon(Icons.close),
+              child: IconButton(
+                icon: Icon(Icons.close),
                 iconSize: 60.0,
                 onPressed: () {
                   io.exit(0);
@@ -411,14 +411,14 @@
     _play(_assets[0]);
   }
 
-  runApp(new MaterialApp(
+  runApp(MaterialApp(
     title: 'Media Player',
     home:
-        _assets.length == 1 ? const _PlaybackScreen() : const _ChooserScreen(),
+        _assets.length == 1 ? const _PlaybackScreen() : _ChooserScreen(),
     routes: <String, WidgetBuilder>{
       '/play': (BuildContext context) => const _PlaybackScreen()
     },
-    theme: new ThemeData(primarySwatch: Colors.blue),
+    theme: ThemeData(primarySwatch: Colors.blue),
     debugShowCheckedModeBanner: false,
   ));
 }
diff --git a/examples/mine_digger/main.dart b/examples/mine_digger/main.dart
index 491befa..4db81ff 100644
--- a/examples/mine_digger/main.dart
+++ b/examples/mine_digger/main.dart
@@ -16,27 +16,27 @@
 // CoveredMineNode and ExposedMineNode, none of them holding state.
 
 // Colors for each mine count (0-8):
-const List<Color> textColors = const <Color>[
-  const Color(0xFF555555),
-  const Color(0xFF0094FF), // blue
-  const Color(0xFF13A023), // green
-  const Color(0xFFDA1414), // red
-  const Color(0xFF1E2347), // black
-  const Color(0xFF7F0037), // dark red
-  const Color(0xFF000000),
-  const Color(0xFF000000),
-  const Color(0xFF000000),
+const List<Color> textColors = <Color>[
+  Color(0xFF555555),
+  Color(0xFF0094FF), // blue
+  Color(0xFF13A023), // green
+  Color(0xFFDA1414), // red
+  Color(0xFF1E2347), // black
+  Color(0xFF7F0037), // dark red
+  Color(0xFF000000),
+  Color(0xFF000000),
+  Color(0xFF000000),
 ];
 
 final List<TextStyle> textStyles = textColors.map((Color color) {
-  return new TextStyle(color: color, fontWeight: FontWeight.bold);
+  return TextStyle(color: color, fontWeight: FontWeight.bold);
 }).toList();
 
 enum CellState { covered, exploded, cleared, flagged, shown }
 
 class MineDigger extends StatefulWidget {
   @override
-  MineDiggerState createState() => new MineDiggerState();
+  MineDiggerState createState() => MineDiggerState();
 }
 
 class MineDiggerState extends State<MineDigger> {
@@ -48,7 +48,7 @@
   bool hasWon;
   int detectedCount;
   Timer timer;
-  Stopwatch gameTime = new Stopwatch();
+  Stopwatch gameTime = Stopwatch();
 
   // |cells| keeps track of the positions of the mines.
   List<List<bool>> cells;
@@ -75,21 +75,21 @@
 
     timer?.cancel();
 
-    timer = new Timer.periodic(const Duration(seconds: 1), (Timer timer) {
+    timer = Timer.periodic(const Duration(seconds: 1), (Timer timer) {
         setState((){
           // time blah blah
           });
       });
 
     // Initialize matrices.
-    cells = new List<List<bool>>.generate(rows, (int row) {
-      return new List<bool>.filled(cols, false);
+    cells = List<List<bool>>.generate(rows, (int row) {
+      return List<bool>.filled(cols, false);
     });
-    uiState = new List<List<CellState>>.generate(rows, (int row) {
-      return new List<CellState>.filled(cols, CellState.covered);
+    uiState = List<List<CellState>>.generate(rows, (int row) {
+      return List<CellState>.filled(cols, CellState.covered);
     });
     // Place the mines.
-    Random random = new Random();
+    Random random = Random();
     int minesRemaining = totalMineCount;
     while (minesRemaining > 0) {
       int pos = random.nextInt(rows * cols);
@@ -125,7 +125,7 @@
             state = cells[iy][ix] ? CellState.shown : state;
         }
         if (state == CellState.covered || state == CellState.flagged) {
-          row.add(new GestureDetector(
+          row.add(GestureDetector(
             onTap: () {
               if (state == CellState.covered)
                 probe(ix, iy);
@@ -134,9 +134,9 @@
               // TODO(cpu): Add audio or haptic feedback.
               flag(ix, iy);
             },
-            child: new Listener(
+            child: Listener(
               onPointerDown: _pointerDownHandlerFor(ix, iy),
-              child: new CoveredMineNode(
+              child: CoveredMineNode(
                 flagged: state == CellState.flagged,
                 posX: ix,
                 posY: iy
@@ -149,17 +149,17 @@
             hasCoveredCell = true;
           }
         } else {
-          row.add(new ExposedMineNode(
+          row.add(ExposedMineNode(
             state: state,
             count: count
           ));
         }
       }
       flexRows.add(
-        new Row(
+        Row(
           children: row,
           mainAxisAlignment: MainAxisAlignment.center,
-          key: new ValueKey<int>(iy)
+          key: ValueKey<int>(iy)
         )
       );
     }
@@ -172,11 +172,11 @@
       }
     }
 
-    return new Container(
-      padding: const EdgeInsets.all(10.0),
-      margin: const EdgeInsets.all(10.0),
-      color: const Color(0xFF6B6B6B),
-      child: new Column(children: flexRows)
+    return Container(
+      padding: EdgeInsets.all(10.0),
+      margin: EdgeInsets.all(10.0),
+      color: Color(0xFF6B6B6B),
+      child: Column(children: flexRows)
     );
   }
 
@@ -187,20 +187,20 @@
         'Kaboom! Try harder [press here]';
 
     int elapsed = gameTime.elapsedMilliseconds ~/ 1000;
-    return new AppBar(
+    return AppBar(
       // FIXME: Strange to have the app bar be tapable.
-      title: new Listener(
+      title: Listener(
         onPointerDown: handleAppBarPointerDown,
-        child: new Text(appBarCaption,
+        child: Text(appBarCaption,
           style: Theme.of(context).primaryTextTheme.title)
       ),
       centerTitle: true,
       actions: <Widget>[
-        new Container(
-          child: new Text('$elapsed seconds'),
+        Container(
+          child: Text('$elapsed seconds'),
           color: Colors.teal,
-          margin: const EdgeInsets.all(14.0),
-          padding: const EdgeInsets.all(2.0))
+          margin: EdgeInsets.all(14.0),
+          padding: EdgeInsets.all(2.0))
         ]
     );
   }
@@ -210,12 +210,12 @@
     // We build the board before we build the app bar because we compute the win state
     // during build step.
     Widget board = buildBoard();
-    return new MaterialApp(
+    return MaterialApp(
       title: 'Mine Digger',
-      home: new Scaffold(
+      home: Scaffold(
         appBar: buildAppBar(context),
-        body: new Container(
-          child: new Center(child: board),
+        body: Container(
+          child: Center(child: board),
           color: Colors.grey[50],
         ),
       ),
@@ -305,19 +305,19 @@
 }
 
 Widget buildCell(Widget child) {
-  return new Container(
-    padding: const EdgeInsets.all(1.0),
+  return Container(
+    padding: EdgeInsets.all(1.0),
     height: 27.0, width: 27.0,
-    color: const Color(0xFFC0C0C0),
-    margin: const EdgeInsets.all(2.0),
+    color: Color(0xFFC0C0C0),
+    margin: EdgeInsets.all(2.0),
     child: child
   );
 }
 
 Widget buildInnerCell(Widget child) {
-  return new Container(
-    padding: const EdgeInsets.all(1.0),
-    margin: const EdgeInsets.all(3.0),
+  return Container(
+    padding: EdgeInsets.all(1.0),
+    margin: EdgeInsets.all(3.0),
     height: 17.0, width: 17.0,
     child: child
   );
@@ -335,8 +335,8 @@
   Widget build(BuildContext context) {
     Widget text;
     if (flagged) {
-      text = buildInnerCell(new RichText(
-        text: new TextSpan(
+      text = buildInnerCell(RichText(
+        text: TextSpan(
           text: 'm',    // TODO(cpu) this should be \u2691
           style: textStyles[5],
         ),
@@ -344,10 +344,10 @@
       ));
     }
 
-    Container inner = new Container(
-      margin: const EdgeInsets.all(2.0),
+    Container inner = Container(
+      margin: EdgeInsets.all(2.0),
       height: 17.0, width: 17.0,
-      color: const Color(0xFFD9D9D9),
+      color: Color(0xFFD9D9D9),
       child: text,
     );
 
@@ -368,8 +368,8 @@
     if (state == CellState.cleared) {
       // Uncovered cell with nearby mine count.
       if (count != 0) {
-        text = new RichText(
-          text: new TextSpan(
+        text = RichText(
+          text: TextSpan(
             text: '$count',
             style: textStyles[count],
           ),
@@ -379,8 +379,8 @@
     } else {
       // Exploded mine or shown mine for 'game over'.
       int color = state == CellState.exploded ? 3 : 0;
-      text = new RichText(
-        text: new TextSpan(
+      text = RichText(
+        text: TextSpan(
           text: '*',   // TODO(cpu) this should be \u2600
           style: textStyles[color],
         ),
@@ -392,5 +392,5 @@
 }
 
 void main() {
-  runApp(new MineDigger());
+  runApp(MineDigger());
 }
diff --git a/examples/test/driver_example_mod/lib/src/handlers/root_intent_handler.dart b/examples/test/driver_example_mod/lib/src/handlers/root_intent_handler.dart
index 694578c..d57abb2 100644
--- a/examples/test/driver_example_mod/lib/src/handlers/root_intent_handler.dart
+++ b/examples/test/driver_example_mod/lib/src/handlers/root_intent_handler.dart
@@ -12,40 +12,40 @@
 class RootIntentHandler extends IntentHandler {
   @override
   void handleIntent(Intent intent) async {
-    DriverExampleModel model = new DriverExampleModel();
+    DriverExampleModel model = DriverExampleModel();
     runApp(
-      new ScopedModel<DriverExampleModel>(
+      ScopedModel<DriverExampleModel>(
         model: model,
-        child: new MaterialApp(
-          home: new Scaffold(
-            body: new ScopedModelDescendant<DriverExampleModel>(
+        child: MaterialApp(
+          home: Scaffold(
+            body: ScopedModelDescendant<DriverExampleModel>(
               builder: (BuildContext context, Widget child,
                   DriverExampleModel model) {
                 return Column(
                   children: <Widget>[
-                    new Center(
-                      child: new Directionality(
+                    Center(
+                      child: Directionality(
                         textDirection: TextDirection.ltr,
-                        child: new Text(
+                        child: Text(
                             'This counter has a value of: ${model.count}'),
                       ),
                     ),
-                    new Row(
+                    Row(
                       children: <Widget>[
-                        new FlatButton(
-                          child: const Text('+1'),
+                        FlatButton(
+                          child: Text('+1'),
                           onPressed: () => model.increment(),
                         ),
-                        new FlatButton(
-                          child: const Text('-1'),
+                        FlatButton(
+                          child: Text('-1'),
                           onPressed: () => model.decrement(),
                         ),
-                        new FlatButton(
-                          child: const Text('+5'),
+                        FlatButton(
+                          child: Text('+5'),
                           onPressed: () => model.increment(by: 5),
                         ),
-                        new FlatButton(
-                          child: const Text('-5'),
+                        FlatButton(
+                          child: Text('-5'),
                           onPressed: () => model.decrement(by: 5),
                         ),
                       ],
diff --git a/examples/test/flutter_widget_test/test/flutter_widget_test.dart b/examples/test/flutter_widget_test/test/flutter_widget_test.dart
index d4c089f..46465e6 100644
--- a/examples/test/flutter_widget_test/test/flutter_widget_test.dart
+++ b/examples/test/flutter_widget_test/test/flutter_widget_test.dart
@@ -4,17 +4,17 @@
 void main() {
   testWidgets('my first widget test', (WidgetTester tester) async {
     // You can use keys to locate the widget you need to test
-    var sliderKey = new UniqueKey();
+    var sliderKey = UniqueKey();
     var value = 0.0;
 
     // Tells the tester to build a UI based on the widget tree passed to it
     await tester.pumpWidget(
-      new StatefulBuilder(
+      StatefulBuilder(
         builder: (BuildContext context, StateSetter setState) {
-          return new MaterialApp(
-            home: new Material(
-              child: new Center(
-                child: new Slider(
+          return MaterialApp(
+            home: Material(
+              child: Center(
+                child: Slider(
                   key: sliderKey,
                   value: value,
                   onChanged: (double newValue) {
diff --git a/examples/ui/localized_mod/lib/localization/messages_all.dart b/examples/ui/localized_mod/lib/localization/messages_all.dart
index e35721f..a91b228 100644
--- a/examples/ui/localized_mod/lib/localization/messages_all.dart
+++ b/examples/ui/localized_mod/lib/localization/messages_all.dart
@@ -37,16 +37,16 @@
     onFailure: (_) => null);
   if (availableLocale == null) {
     // ignore: unnecessary_new
-    return new Future.value(false);
+    return Future.value(false);
   }
   var lib = _deferredLibraries[availableLocale];
   // ignore: unnecessary_new
-  await (lib == null ? new Future.value(false) : lib());
+  await (lib == null ? Future.value(false) : lib());
   // ignore: unnecessary_new
-  initializeInternalMessageLookup(() => new CompositeMessageLookup());
+  initializeInternalMessageLookup(() => CompositeMessageLookup());
   messageLookup.addLocale(availableLocale, _findGeneratedMessagesFor);
   // ignore: unnecessary_new
-  return new Future.value(true);
+  return Future.value(true);
 }
 
 bool _messagesExistFor(String locale) {
diff --git a/examples/ui/localized_mod/lib/localization/messages_he.dart b/examples/ui/localized_mod/lib/localization/messages_he.dart
index df01141..0246077 100644
--- a/examples/ui/localized_mod/lib/localization/messages_he.dart
+++ b/examples/ui/localized_mod/lib/localization/messages_he.dart
@@ -7,7 +7,7 @@
 import 'package:intl/message_lookup_by_library.dart';
 
 // ignore: unnecessary_new
-final messages = new MessageLookup();
+final messages = MessageLookup();
 
 // ignore: unused_element
 final _keepAnalysisHappy = Intl.defaultLocale;
diff --git a/examples/ui/localized_mod/lib/localization/messages_messages.dart b/examples/ui/localized_mod/lib/localization/messages_messages.dart
index 5516dc3..c2d2c2c 100644
--- a/examples/ui/localized_mod/lib/localization/messages_messages.dart
+++ b/examples/ui/localized_mod/lib/localization/messages_messages.dart
@@ -7,7 +7,7 @@
 import 'package:intl/message_lookup_by_library.dart';
 
 // ignore: unnecessary_new
-final messages = new MessageLookup();
+final messages = MessageLookup();
 
 // ignore: unused_element
 final _keepAnalysisHappy = Intl.defaultLocale;
diff --git a/examples/ui/localized_mod/lib/localized_mod_strings.dart b/examples/ui/localized_mod/lib/localized_mod_strings.dart
index b197e13..29bf541 100644
--- a/examples/ui/localized_mod/lib/localized_mod_strings.dart
+++ b/examples/ui/localized_mod/lib/localized_mod_strings.dart
@@ -25,7 +25,7 @@
         name: 'bodyText',
         args: [itemCount],
         desc: 'How many messages are in the list.',
-        examples: const {'itemCount': 42},
+        examples: {'itemCount': 42},
       );
 
   static String get footer => Intl.message(
diff --git a/examples/ui/simple_flutter/lib/leaf.dart b/examples/ui/simple_flutter/lib/leaf.dart
index 1586a41..869969c 100644
--- a/examples/ui/simple_flutter/lib/leaf.dart
+++ b/examples/ui/simple_flutter/lib/leaf.dart
@@ -1,16 +1,16 @@
 import 'package:flutter/material.dart';
 
-void main() => runApp(new MyApp());
+void main() => runApp(MyApp());
 
 class MyApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return new MaterialApp(
+    return MaterialApp(
       title: 'Flutter Demo',
-      theme: new ThemeData(
+      theme: ThemeData(
         primarySwatch: Colors.blue,
       ),
-      home: new MyHomePage(title: 'Leaf Flutter'),
+      home: MyHomePage(title: 'Leaf Flutter'),
     );
   }
 }
@@ -21,22 +21,22 @@
   final String title;
 
   @override
-  _MyHomePageState createState() => new _MyHomePageState();
+  _MyHomePageState createState() => _MyHomePageState();
 }
 
 // Update with Tap to increment counter
 class _MyHomePageState extends State<MyHomePage> {
   @override
   Widget build(BuildContext context) {
-    return new Scaffold(
-        appBar: new AppBar(
-          title: new Text(widget.title),
+    return Scaffold(
+        appBar: AppBar(
+          title: Text(widget.title),
         ),
-        body: new Center(
-            child: new Column(
+        body: Center(
+            child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: <Widget>[
-            new Text('Hi!'),
+            Text('Hi!'),
           ],
         )));
   }
diff --git a/examples/ui/simple_flutter/lib/main.dart b/examples/ui/simple_flutter/lib/main.dart
index 8bb2233..d99b595 100644
--- a/examples/ui/simple_flutter/lib/main.dart
+++ b/examples/ui/simple_flutter/lib/main.dart
@@ -2,17 +2,17 @@
 import 'package:lib.app.dart/app.dart';
 import 'package:lib.widgets/application_deprecated.dart';
 
-void main() => runApp(new MyApp());
+void main() => runApp(MyApp());
 
 class MyApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return new MaterialApp(
+    return MaterialApp(
       title: 'Gesture Demo',
-      theme: new ThemeData(
+      theme: ThemeData(
         primarySwatch: Colors.blue,
       ),
-      home: new MyHomePage(title: 'Gesture Demo - Multiple Process'),
+      home: MyHomePage(title: 'Gesture Demo - Multiple Process'),
     );
   }
 }
@@ -23,7 +23,7 @@
   final String title;
 
   @override
-  _MyHomePageState createState() => new _MyHomePageState();
+  _MyHomePageState createState() => _MyHomePageState();
 }
 
 class _MyHomePageState extends State<MyHomePage> {
@@ -53,47 +53,47 @@
 
   @override
   Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text(widget.title),
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.title),
       ),
-      body: new Center(
-        child: new Row(
+      body: Center(
+        child: Row(
           mainAxisAlignment: MainAxisAlignment.center,
           children: <Widget>[
-            new Column(
+            Column(
                 mainAxisAlignment: MainAxisAlignment.center,
                 children: <Widget>[
-                  new Dismissible(
-                      key: new Key('left$leftCounter'),
+                  Dismissible(
+                      key: Key('left$leftCounter'),
                       onDismissed: _onLeftDismissed,
                       resizeDuration: null,
-                      child: new Card(
-                        child: new Container(
+                      child: Card(
+                        child: Container(
                             width: 300.0,
                             height: 300.0,
                             color: colors[leftCounter % colors.length]),
                       )),
-                  new Text('Left, $leftCounter')
+                  Text('Left, $leftCounter')
                 ]),
-            new Column(
+            Column(
                 mainAxisAlignment: MainAxisAlignment.center,
                 children: <Widget>[
-                  new Dismissible(
-                      key: new Key('right$rightCounter'),
+                  Dismissible(
+                      key: Key('right$rightCounter'),
                       onDismissed: _onRightDismissed,
                       resizeDuration: null,
-                      child: new Card(
-                          child: new Container(
+                      child: Card(
+                          child: Container(
                         width: 300.0,
                         height: 300.0,
-                        child: new ApplicationWidget(
+                        child: ApplicationWidget(
                             url:
                                 'fuchsia-pkg://fuchsia.com/simple_flutter#meta/leaf_flutter.cmx',
                             launcher:
                                 StartupContext.fromStartupInfo().launcher),
                       ))),
-                  new Text('Right, $rightCounter')
+                  Text('Right, $rightCounter')
                 ]),
           ],
         ),
diff --git a/lib/base_shell/lib/base_model.dart b/lib/base_shell/lib/base_model.dart
index 8d68ef7..4f558d3 100644
--- a/lib/base_shell/lib/base_model.dart
+++ b/lib/base_shell/lib/base_model.dart
@@ -32,7 +32,7 @@
 /// Function signature for GetPresentationMode callback
 typedef GetPresentationModeCallback = void Function(PresentationMode mode);
 
-const Duration _kCobaltTimerTimeout = const Duration(seconds: 20);
+const Duration _kCobaltTimerTimeout = Duration(seconds: 20);
 const int _kSessionShellLoginTimeMetricId = 14;
 
 // This class is extends the Presentation protocol and implements and PresentationModeListener.
diff --git a/lib/base_shell/lib/base_shell_widget.dart b/lib/base_shell/lib/base_shell_widget.dart
index 11a4c28..b6026b9 100644
--- a/lib/base_shell/lib/base_shell_widget.dart
+++ b/lib/base_shell/lib/base_shell_widget.dart
@@ -27,11 +27,11 @@
 
   /// The bindings for the [BaseShell] service implemented by [BaseShellImpl].
   final Set<BaseShellBinding> _baseShellBindingSet =
-      new Set<BaseShellBinding>();
+      Set<BaseShellBinding>();
 
   /// The bindings for the [Lifecycle] service implemented by [BaseShellImpl].
   final Set<LifecycleBinding> _lifecycleBindingSet =
-      new Set<LifecycleBinding>();
+      Set<LifecycleBinding>();
 
   /// The [BaseShell] to [advertise].
   final BaseShellImpl _baseShell;
@@ -54,14 +54,14 @@
         );
 
   @override
-  Widget build(BuildContext context) => new MaterialApp(
-        home: new Material(
-          child: new Directionality(
+  Widget build(BuildContext context) => MaterialApp(
+        home: Material(
+          child: Directionality(
             textDirection: TextDirection.ltr,
-            child: new WindowMediaQuery(
+            child: WindowMediaQuery(
               child: _baseShellModel == null
                   ? child
-                  : new ScopedModel<T>(model: _baseShellModel, child: child),
+                  : ScopedModel<T>(model: _baseShellModel, child: child),
             ),
           ),
         ),
@@ -72,12 +72,12 @@
   void advertise() {
     startupContext.outgoing
       ..addPublicService((InterfaceRequest<BaseShell> request) {
-        BaseShellBinding binding = new BaseShellBinding()
+        BaseShellBinding binding = BaseShellBinding()
           ..bind(_baseShell, request);
         _baseShellBindingSet.add(binding);
       }, BaseShell.$serviceName)
       ..addPublicService((InterfaceRequest<Lifecycle> request) {
-        LifecycleBinding binding = new LifecycleBinding()
+        LifecycleBinding binding = LifecycleBinding()
           ..bind(_baseShell, request);
         _lifecycleBindingSet.add(binding);
       }, Lifecycle.$serviceName);
@@ -87,7 +87,7 @@
     BaseShellModel baseShellModel,
     AuthenticationUiContext authenticationUiContext,
   ) {
-    return new BaseShellImpl(
+    return BaseShellImpl(
       authenticationUiContext: authenticationUiContext,
       onReady: baseShellModel?.onReady,
       onStop: () {
diff --git a/lib/base_shell/lib/netstack_model.dart b/lib/base_shell/lib/netstack_model.dart
index 145d3f1..c01127a 100644
--- a/lib/base_shell/lib/netstack_model.dart
+++ b/lib/base_shell/lib/netstack_model.dart
@@ -14,9 +14,9 @@
 
 const String _kLoopbackInterfaceName = 'en1';
 
-const Duration _kRepeatAnimationDuration = const Duration(milliseconds: 400);
+const Duration _kRepeatAnimationDuration = Duration(milliseconds: 400);
 
-const Duration _kRevealAnimationDuration = const Duration(milliseconds: 200);
+const Duration _kRevealAnimationDuration = Duration(milliseconds: 200);
 void _updateAnimations(
   bool oldValue,
   bool newValue,
@@ -55,19 +55,19 @@
 
   /// Constructor.
   InterfaceInfo(this._interface, this._stats, TickerProvider _vsync) {
-    receivingRevealAnimation = new AnimationController(
+    receivingRevealAnimation = AnimationController(
       duration: _kRevealAnimationDuration,
       vsync: _vsync,
     );
-    receivingRepeatAnimation = new AnimationController(
+    receivingRepeatAnimation = AnimationController(
       duration: _kRepeatAnimationDuration,
       vsync: _vsync,
     );
-    sendingRevealAnimation = new AnimationController(
+    sendingRevealAnimation = AnimationController(
       duration: _kRevealAnimationDuration,
       vsync: _vsync,
     );
-    sendingRepeatAnimation = new AnimationController(
+    sendingRepeatAnimation = AnimationController(
       duration: _kRepeatAnimationDuration,
       vsync: _vsync,
     );
@@ -146,7 +146,7 @@
       netstack.getStats(interface.id).then(
         (ns.NetInterfaceStats stats) {
           if (_interfaces[interface.id] == null) {
-            _interfaces[interface.id] = new InterfaceInfo(
+            _interfaces[interface.id] = InterfaceInfo(
               interface,
               stats,
               this,
diff --git a/lib/keyboard/flutter/lib/src/keyboard_container.dart b/lib/keyboard/flutter/lib/src/keyboard_container.dart
index 9bfc5a4..9182a2d 100644
--- a/lib/keyboard/flutter/lib/src/keyboard_container.dart
+++ b/lib/keyboard/flutter/lib/src/keyboard_container.dart
@@ -62,8 +62,8 @@
       child: SizedBox(
         height: _kKeyboardOverlayHeight,
         child: Material(
-          borderRadius: const BorderRadius.vertical(
-              top: const Radius.circular(_kKeyboardCornerRadius)),
+          borderRadius: BorderRadius.vertical(
+              top: Radius.circular(_kKeyboardCornerRadius)),
           elevation: elevation ?? model.keyboardElevation,
           child: ApplicationWidget(
             url: 'fuchsia-pkg://fuchsia.com/latin-ime#meta/latin-ime.cmx',
diff --git a/lib/keyboard_deprecated/flutter/lib/src/keyboard_container.dart b/lib/keyboard_deprecated/flutter/lib/src/keyboard_container.dart
index 893b635..4f9aeac 100644
--- a/lib/keyboard_deprecated/flutter/lib/src/keyboard_container.dart
+++ b/lib/keyboard_deprecated/flutter/lib/src/keyboard_container.dart
@@ -62,8 +62,8 @@
       child: SizedBox(
         height: _kKeyboardOverlayHeight,
         child: Material(
-          borderRadius: const BorderRadius.vertical(
-              top: const Radius.circular(_kKeyboardCornerRadius)),
+          borderRadius: BorderRadius.vertical(
+              top: Radius.circular(_kKeyboardCornerRadius)),
           elevation: elevation ?? model.keyboardElevation,
           child: ApplicationWidget(
             url: 'fuchsia-pkg://fuchsia.com/latin-ime#meta/latin-ime.cmx',
diff --git a/lib/settings/lib/device_info.dart b/lib/settings/lib/device_info.dart
index 835e74f..f79f883 100644
--- a/lib/settings/lib/device_info.dart
+++ b/lib/settings/lib/device_info.dart
@@ -15,7 +15,7 @@
 
   /// Returns the date the source code was last updated.
   static DateTime getSourceDate() {
-    final File updateFile = new File(_lastUpdateFilePath);
+    final File updateFile = File(_lastUpdateFilePath);
 
     if (updateFile.existsSync()) {
       final String lastUpdate = updateFile.readAsStringSync();
diff --git a/lib/settings/lib/timezone_picker.dart b/lib/settings/lib/timezone_picker.dart
index d460ed1..ccb5a65 100644
--- a/lib/settings/lib/timezone_picker.dart
+++ b/lib/settings/lib/timezone_picker.dart
@@ -13,568 +13,568 @@
 
 // Note: these timezones were generated from a script using ICU data.
 // These should ideally be loaded ad hoc or stored somewhere.
-const List<_Timezone> _kTimeZones = const <_Timezone>[
-  const _Timezone(zoneId: 'US/Eastern'),
-  const _Timezone(zoneId: 'US/Pacific'),
-  const _Timezone(zoneId: 'Europe/Paris'),
-  const _Timezone(zoneId: 'Africa/Abidjan'),
-  const _Timezone(zoneId: 'Africa/Accra'),
-  const _Timezone(zoneId: 'Africa/Addis_Ababa'),
-  const _Timezone(zoneId: 'Africa/Algiers'),
-  const _Timezone(zoneId: 'Africa/Asmara'),
-  const _Timezone(zoneId: 'Africa/Asmera'),
-  const _Timezone(zoneId: 'Africa/Bamako'),
-  const _Timezone(zoneId: 'Africa/Bangui'),
-  const _Timezone(zoneId: 'Africa/Banjul'),
-  const _Timezone(zoneId: 'Africa/Bissau'),
-  const _Timezone(zoneId: 'Africa/Blantyre'),
-  const _Timezone(zoneId: 'Africa/Brazzaville'),
-  const _Timezone(zoneId: 'Africa/Bujumbura'),
-  const _Timezone(zoneId: 'Africa/Cairo'),
-  const _Timezone(zoneId: 'Africa/Casablanca'),
-  const _Timezone(zoneId: 'Africa/Ceuta'),
-  const _Timezone(zoneId: 'Africa/Conakry'),
-  const _Timezone(zoneId: 'Africa/Dakar'),
-  const _Timezone(zoneId: 'Africa/Dar_es_Salaam'),
-  const _Timezone(zoneId: 'Africa/Djibouti'),
-  const _Timezone(zoneId: 'Africa/Douala'),
-  const _Timezone(zoneId: 'Africa/El_Aaiun'),
-  const _Timezone(zoneId: 'Africa/Freetown'),
-  const _Timezone(zoneId: 'Africa/Gaborone'),
-  const _Timezone(zoneId: 'Africa/Harare'),
-  const _Timezone(zoneId: 'Africa/Johannesburg'),
-  const _Timezone(zoneId: 'Africa/Kampala'),
-  const _Timezone(zoneId: 'Africa/Khartoum'),
-  const _Timezone(zoneId: 'Africa/Kigali'),
-  const _Timezone(zoneId: 'Africa/Kinshasa'),
-  const _Timezone(zoneId: 'Africa/Lagos'),
-  const _Timezone(zoneId: 'Africa/Libreville'),
-  const _Timezone(zoneId: 'Africa/Lome'),
-  const _Timezone(zoneId: 'Africa/Luanda'),
-  const _Timezone(zoneId: 'Africa/Lubumbashi'),
-  const _Timezone(zoneId: 'Africa/Lusaka'),
-  const _Timezone(zoneId: 'Africa/Malabo'),
-  const _Timezone(zoneId: 'Africa/Maputo'),
-  const _Timezone(zoneId: 'Africa/Maseru'),
-  const _Timezone(zoneId: 'Africa/Mbabane'),
-  const _Timezone(zoneId: 'Africa/Mogadishu'),
-  const _Timezone(zoneId: 'Africa/Monrovia'),
-  const _Timezone(zoneId: 'Africa/Nairobi'),
-  const _Timezone(zoneId: 'Africa/Ndjamena'),
-  const _Timezone(zoneId: 'Africa/Niamey'),
-  const _Timezone(zoneId: 'Africa/Nouakchott'),
-  const _Timezone(zoneId: 'Africa/Ouagadougou'),
-  const _Timezone(zoneId: 'Africa/Porto-Novo'),
-  const _Timezone(zoneId: 'Africa/Sao_Tome'),
-  const _Timezone(zoneId: 'Africa/Timbuktu'),
-  const _Timezone(zoneId: 'Africa/Tripoli'),
-  const _Timezone(zoneId: 'Africa/Tunis'),
-  const _Timezone(zoneId: 'Africa/Windhoek'),
-  const _Timezone(zoneId: 'America/Adak'),
-  const _Timezone(zoneId: 'America/Anchorage'),
-  const _Timezone(zoneId: 'America/Anguilla'),
-  const _Timezone(zoneId: 'America/Antigua'),
-  const _Timezone(zoneId: 'America/Araguaina'),
-  const _Timezone(zoneId: 'America/Argentina/Buenos_Aires'),
-  const _Timezone(zoneId: 'America/Argentina/Catamarca'),
-  const _Timezone(zoneId: 'America/Argentina/ComodRivadavia'),
-  const _Timezone(zoneId: 'America/Argentina/Cordoba'),
-  const _Timezone(zoneId: 'America/Argentina/Jujuy'),
-  const _Timezone(zoneId: 'America/Argentina/La_Rioja'),
-  const _Timezone(zoneId: 'America/Argentina/Mendoza'),
-  const _Timezone(zoneId: 'America/Argentina/Rio_Gallegos'),
-  const _Timezone(zoneId: 'America/Argentina/San_Juan'),
-  const _Timezone(zoneId: 'America/Argentina/Tucuman'),
-  const _Timezone(zoneId: 'America/Argentina/Ushuaia'),
-  const _Timezone(zoneId: 'America/Aruba'),
-  const _Timezone(zoneId: 'America/Asuncion'),
-  const _Timezone(zoneId: 'America/Atikokan'),
-  const _Timezone(zoneId: 'America/Atka'),
-  const _Timezone(zoneId: 'America/Bahia'),
-  const _Timezone(zoneId: 'America/Barbados'),
-  const _Timezone(zoneId: 'America/Belem'),
-  const _Timezone(zoneId: 'America/Belize'),
-  const _Timezone(zoneId: 'America/Blanc-Sablon'),
-  const _Timezone(zoneId: 'America/Boa_Vista'),
-  const _Timezone(zoneId: 'America/Bogota'),
-  const _Timezone(zoneId: 'America/Boise'),
-  const _Timezone(zoneId: 'America/Buenos_Aires'),
-  const _Timezone(zoneId: 'America/Cambridge_Bay'),
-  const _Timezone(zoneId: 'America/Campo_Grande'),
-  const _Timezone(zoneId: 'America/Cancun'),
-  const _Timezone(zoneId: 'America/Caracas'),
-  const _Timezone(zoneId: 'America/Catamarca'),
-  const _Timezone(zoneId: 'America/Cayenne'),
-  const _Timezone(zoneId: 'America/Cayman'),
-  const _Timezone(zoneId: 'America/Chicago'),
-  const _Timezone(zoneId: 'America/Chihuahua'),
-  const _Timezone(zoneId: 'America/Coral_Harbour'),
-  const _Timezone(zoneId: 'America/Cordoba'),
-  const _Timezone(zoneId: 'America/Costa_Rica'),
-  const _Timezone(zoneId: 'America/Cuiaba'),
-  const _Timezone(zoneId: 'America/Curacao'),
-  const _Timezone(zoneId: 'America/Danmarkshavn'),
-  const _Timezone(zoneId: 'America/Dawson'),
-  const _Timezone(zoneId: 'America/Dawson_Creek'),
-  const _Timezone(zoneId: 'America/Denver'),
-  const _Timezone(zoneId: 'America/Detroit'),
-  const _Timezone(zoneId: 'America/Dominica'),
-  const _Timezone(zoneId: 'America/Edmonton'),
-  const _Timezone(zoneId: 'America/Eirunepe'),
-  const _Timezone(zoneId: 'America/El_Salvador'),
-  const _Timezone(zoneId: 'America/Ensenada'),
-  const _Timezone(zoneId: 'America/Fort_Wayne'),
-  const _Timezone(zoneId: 'America/Fortaleza'),
-  const _Timezone(zoneId: 'America/Glace_Bay'),
-  const _Timezone(zoneId: 'America/Godthab'),
-  const _Timezone(zoneId: 'America/Goose_Bay'),
-  const _Timezone(zoneId: 'America/Grand_Turk'),
-  const _Timezone(zoneId: 'America/Grenada'),
-  const _Timezone(zoneId: 'America/Guadeloupe'),
-  const _Timezone(zoneId: 'America/Guatemala'),
-  const _Timezone(zoneId: 'America/Guayaquil'),
-  const _Timezone(zoneId: 'America/Guyana'),
-  const _Timezone(zoneId: 'America/Halifax'),
-  const _Timezone(zoneId: 'America/Havana'),
-  const _Timezone(zoneId: 'America/Hermosillo'),
-  const _Timezone(zoneId: 'America/Indiana/Indianapolis'),
-  const _Timezone(zoneId: 'America/Indiana/Knox'),
-  const _Timezone(zoneId: 'America/Indiana/Marengo'),
-  const _Timezone(zoneId: 'America/Indiana/Petersburg'),
-  const _Timezone(zoneId: 'America/Indiana/Tell_City'),
-  const _Timezone(zoneId: 'America/Indiana/Vevay'),
-  const _Timezone(zoneId: 'America/Indiana/Vincennes'),
-  const _Timezone(zoneId: 'America/Indiana/Winamac'),
-  const _Timezone(zoneId: 'America/Indianapolis'),
-  const _Timezone(zoneId: 'America/Inuvik'),
-  const _Timezone(zoneId: 'America/Iqaluit'),
-  const _Timezone(zoneId: 'America/Jamaica'),
-  const _Timezone(zoneId: 'America/Jujuy'),
-  const _Timezone(zoneId: 'America/Juneau'),
-  const _Timezone(zoneId: 'America/Kentucky/Louisville'),
-  const _Timezone(zoneId: 'America/Kentucky/Monticello'),
-  const _Timezone(zoneId: 'America/Knox_IN'),
-  const _Timezone(zoneId: 'America/La_Paz'),
-  const _Timezone(zoneId: 'America/Lima'),
-  const _Timezone(zoneId: 'America/Los_Angeles'),
-  const _Timezone(zoneId: 'America/Louisville'),
-  const _Timezone(zoneId: 'America/Maceio'),
-  const _Timezone(zoneId: 'America/Managua'),
-  const _Timezone(zoneId: 'America/Manaus'),
-  const _Timezone(zoneId: 'America/Marigot'),
-  const _Timezone(zoneId: 'America/Martinique'),
-  const _Timezone(zoneId: 'America/Mazatlan'),
-  const _Timezone(zoneId: 'America/Mendoza'),
-  const _Timezone(zoneId: 'America/Menominee'),
-  const _Timezone(zoneId: 'America/Merida'),
-  const _Timezone(zoneId: 'America/Mexico_City'),
-  const _Timezone(zoneId: 'America/Miquelon'),
-  const _Timezone(zoneId: 'America/Moncton'),
-  const _Timezone(zoneId: 'America/Monterrey'),
-  const _Timezone(zoneId: 'America/Montevideo'),
-  const _Timezone(zoneId: 'America/Montreal'),
-  const _Timezone(zoneId: 'America/Montserrat'),
-  const _Timezone(zoneId: 'America/Nassau'),
-  const _Timezone(zoneId: 'America/New_York'),
-  const _Timezone(zoneId: 'America/Nipigon'),
-  const _Timezone(zoneId: 'America/Nome'),
-  const _Timezone(zoneId: 'America/Noronha'),
-  const _Timezone(zoneId: 'America/North_Dakota/Center'),
-  const _Timezone(zoneId: 'America/North_Dakota/New_Salem'),
-  const _Timezone(zoneId: 'America/Panama'),
-  const _Timezone(zoneId: 'America/Pangnirtung'),
-  const _Timezone(zoneId: 'America/Paramaribo'),
-  const _Timezone(zoneId: 'America/Phoenix'),
-  const _Timezone(zoneId: 'America/Port-au-Prince'),
-  const _Timezone(zoneId: 'America/Port_of_Spain'),
-  const _Timezone(zoneId: 'America/Porto_Acre'),
-  const _Timezone(zoneId: 'America/Porto_Velho'),
-  const _Timezone(zoneId: 'America/Puerto_Rico'),
-  const _Timezone(zoneId: 'America/Rainy_River'),
-  const _Timezone(zoneId: 'America/Rankin_Inlet'),
-  const _Timezone(zoneId: 'America/Recife'),
-  const _Timezone(zoneId: 'America/Regina'),
-  const _Timezone(zoneId: 'America/Resolute'),
-  const _Timezone(zoneId: 'America/Rio_Branco'),
-  const _Timezone(zoneId: 'America/Rosario'),
-  const _Timezone(zoneId: 'America/Santiago'),
-  const _Timezone(zoneId: 'America/Santo_Domingo'),
-  const _Timezone(zoneId: 'America/Sao_Paulo'),
-  const _Timezone(zoneId: 'America/Scoresbysund'),
-  const _Timezone(zoneId: 'America/Shiprock'),
-  const _Timezone(zoneId: 'America/St_Barthelemy'),
-  const _Timezone(zoneId: 'America/St_Johns'),
-  const _Timezone(zoneId: 'America/St_Kitts'),
-  const _Timezone(zoneId: 'America/St_Lucia'),
-  const _Timezone(zoneId: 'America/St_Thomas'),
-  const _Timezone(zoneId: 'America/St_Vincent'),
-  const _Timezone(zoneId: 'America/Swift_Current'),
-  const _Timezone(zoneId: 'America/Tegucigalpa'),
-  const _Timezone(zoneId: 'America/Thule'),
-  const _Timezone(zoneId: 'America/Thunder_Bay'),
-  const _Timezone(zoneId: 'America/Tijuana'),
-  const _Timezone(zoneId: 'America/Toronto'),
-  const _Timezone(zoneId: 'America/Tortola'),
-  const _Timezone(zoneId: 'America/Vancouver'),
-  const _Timezone(zoneId: 'America/Virgin'),
-  const _Timezone(zoneId: 'America/Whitehorse'),
-  const _Timezone(zoneId: 'America/Winnipeg'),
-  const _Timezone(zoneId: 'America/Yakutat'),
-  const _Timezone(zoneId: 'America/Yellowknife'),
-  const _Timezone(zoneId: 'Antarctica/Casey'),
-  const _Timezone(zoneId: 'Antarctica/Davis'),
-  const _Timezone(zoneId: 'Antarctica/DumontDUrville'),
-  const _Timezone(zoneId: 'Antarctica/Mawson'),
-  const _Timezone(zoneId: 'Antarctica/McMurdo'),
-  const _Timezone(zoneId: 'Antarctica/Palmer'),
-  const _Timezone(zoneId: 'Antarctica/Rothera'),
-  const _Timezone(zoneId: 'Antarctica/South_Pole'),
-  const _Timezone(zoneId: 'Antarctica/Syowa'),
-  const _Timezone(zoneId: 'Antarctica/Vostok'),
-  const _Timezone(zoneId: 'Arctic/Longyearbyen'),
-  const _Timezone(zoneId: 'Asia/Aden'),
-  const _Timezone(zoneId: 'Asia/Almaty'),
-  const _Timezone(zoneId: 'Asia/Amman'),
-  const _Timezone(zoneId: 'Asia/Anadyr'),
-  const _Timezone(zoneId: 'Asia/Aqtau'),
-  const _Timezone(zoneId: 'Asia/Aqtobe'),
-  const _Timezone(zoneId: 'Asia/Ashgabat'),
-  const _Timezone(zoneId: 'Asia/Ashkhabad'),
-  const _Timezone(zoneId: 'Asia/Baghdad'),
-  const _Timezone(zoneId: 'Asia/Bahrain'),
-  const _Timezone(zoneId: 'Asia/Baku'),
-  const _Timezone(zoneId: 'Asia/Bangkok'),
-  const _Timezone(zoneId: 'Asia/Beirut'),
-  const _Timezone(zoneId: 'Asia/Bishkek'),
-  const _Timezone(zoneId: 'Asia/Brunei'),
-  const _Timezone(zoneId: 'Asia/Calcutta'),
-  const _Timezone(zoneId: 'Asia/Choibalsan'),
-  const _Timezone(zoneId: 'Asia/Chongqing'),
-  const _Timezone(zoneId: 'Asia/Chungking'),
-  const _Timezone(zoneId: 'Asia/Colombo'),
-  const _Timezone(zoneId: 'Asia/Dacca'),
-  const _Timezone(zoneId: 'Asia/Damascus'),
-  const _Timezone(zoneId: 'Asia/Dhaka'),
-  const _Timezone(zoneId: 'Asia/Dili'),
-  const _Timezone(zoneId: 'Asia/Dubai'),
-  const _Timezone(zoneId: 'Asia/Dushanbe'),
-  const _Timezone(zoneId: 'Asia/Gaza'),
-  const _Timezone(zoneId: 'Asia/Harbin'),
-  const _Timezone(zoneId: 'Asia/Hong_Kong'),
-  const _Timezone(zoneId: 'Asia/Hovd'),
-  const _Timezone(zoneId: 'Asia/Irkutsk'),
-  const _Timezone(zoneId: 'Asia/Istanbul'),
-  const _Timezone(zoneId: 'Asia/Jakarta'),
-  const _Timezone(zoneId: 'Asia/Jayapura'),
-  const _Timezone(zoneId: 'Asia/Jerusalem'),
-  const _Timezone(zoneId: 'Asia/Kabul'),
-  const _Timezone(zoneId: 'Asia/Kamchatka'),
-  const _Timezone(zoneId: 'Asia/Karachi'),
-  const _Timezone(zoneId: 'Asia/Kashgar'),
-  const _Timezone(zoneId: 'Asia/Katmandu'),
-  const _Timezone(zoneId: 'Asia/Krasnoyarsk'),
-  const _Timezone(zoneId: 'Asia/Kuala_Lumpur'),
-  const _Timezone(zoneId: 'Asia/Kuching'),
-  const _Timezone(zoneId: 'Asia/Kuwait'),
-  const _Timezone(zoneId: 'Asia/Macao'),
-  const _Timezone(zoneId: 'Asia/Macau'),
-  const _Timezone(zoneId: 'Asia/Magadan'),
-  const _Timezone(zoneId: 'Asia/Makassar'),
-  const _Timezone(zoneId: 'Asia/Manila'),
-  const _Timezone(zoneId: 'Asia/Muscat'),
-  const _Timezone(zoneId: 'Asia/Nicosia'),
-  const _Timezone(zoneId: 'Asia/Novosibirsk'),
-  const _Timezone(zoneId: 'Asia/Omsk'),
-  const _Timezone(zoneId: 'Asia/Oral'),
-  const _Timezone(zoneId: 'Asia/Phnom_Penh'),
-  const _Timezone(zoneId: 'Asia/Pontianak'),
-  const _Timezone(zoneId: 'Asia/Pyongyang'),
-  const _Timezone(zoneId: 'Asia/Qatar'),
-  const _Timezone(zoneId: 'Asia/Qyzylorda'),
-  const _Timezone(zoneId: 'Asia/Rangoon'),
-  const _Timezone(zoneId: 'Asia/Riyadh'),
-  const _Timezone(zoneId: 'Asia/Riyadh87'),
-  const _Timezone(zoneId: 'Asia/Riyadh88'),
-  const _Timezone(zoneId: 'Asia/Riyadh89'),
-  const _Timezone(zoneId: 'Asia/Saigon'),
-  const _Timezone(zoneId: 'Asia/Sakhalin'),
-  const _Timezone(zoneId: 'Asia/Samarkand'),
-  const _Timezone(zoneId: 'Asia/Seoul'),
-  const _Timezone(zoneId: 'Asia/Shanghai'),
-  const _Timezone(zoneId: 'Asia/Singapore'),
-  const _Timezone(zoneId: 'Asia/Taipei'),
-  const _Timezone(zoneId: 'Asia/Tashkent'),
-  const _Timezone(zoneId: 'Asia/Tbilisi'),
-  const _Timezone(zoneId: 'Asia/Tehran'),
-  const _Timezone(zoneId: 'Asia/Tel_Aviv'),
-  const _Timezone(zoneId: 'Asia/Thimbu'),
-  const _Timezone(zoneId: 'Asia/Thimphu'),
-  const _Timezone(zoneId: 'Asia/Tokyo'),
-  const _Timezone(zoneId: 'Asia/Ujung_Pandang'),
-  const _Timezone(zoneId: 'Asia/Ulaanbaatar'),
-  const _Timezone(zoneId: 'Asia/Ulan_Bator'),
-  const _Timezone(zoneId: 'Asia/Urumqi'),
-  const _Timezone(zoneId: 'Asia/Vientiane'),
-  const _Timezone(zoneId: 'Asia/Vladivostok'),
-  const _Timezone(zoneId: 'Asia/Yakutsk'),
-  const _Timezone(zoneId: 'Asia/Yekaterinburg'),
-  const _Timezone(zoneId: 'Asia/Yerevan'),
-  const _Timezone(zoneId: 'Atlantic/Azores'),
-  const _Timezone(zoneId: 'Atlantic/Bermuda'),
-  const _Timezone(zoneId: 'Atlantic/Canary'),
-  const _Timezone(zoneId: 'Atlantic/Cape_Verde'),
-  const _Timezone(zoneId: 'Atlantic/Faeroe'),
-  const _Timezone(zoneId: 'Atlantic/Faroe'),
-  const _Timezone(zoneId: 'Atlantic/Jan_Mayen'),
-  const _Timezone(zoneId: 'Atlantic/Madeira'),
-  const _Timezone(zoneId: 'Atlantic/Reykjavik'),
-  const _Timezone(zoneId: 'Atlantic/South_Georgia'),
-  const _Timezone(zoneId: 'Atlantic/St_Helena'),
-  const _Timezone(zoneId: 'Atlantic/Stanley'),
-  const _Timezone(zoneId: 'Australia/ACT'),
-  const _Timezone(zoneId: 'Australia/Adelaide'),
-  const _Timezone(zoneId: 'Australia/Brisbane'),
-  const _Timezone(zoneId: 'Australia/Broken_Hill'),
-  const _Timezone(zoneId: 'Australia/Canberra'),
-  const _Timezone(zoneId: 'Australia/Currie'),
-  const _Timezone(zoneId: 'Australia/Darwin'),
-  const _Timezone(zoneId: 'Australia/Eucla'),
-  const _Timezone(zoneId: 'Australia/Hobart'),
-  const _Timezone(zoneId: 'Australia/LHI'),
-  const _Timezone(zoneId: 'Australia/Lindeman'),
-  const _Timezone(zoneId: 'Australia/Lord_Howe'),
-  const _Timezone(zoneId: 'Australia/Melbourne'),
-  const _Timezone(zoneId: 'Australia/NSW'),
-  const _Timezone(zoneId: 'Australia/North'),
-  const _Timezone(zoneId: 'Australia/Perth'),
-  const _Timezone(zoneId: 'Australia/Queensland'),
-  const _Timezone(zoneId: 'Australia/South'),
-  const _Timezone(zoneId: 'Australia/Sydney'),
-  const _Timezone(zoneId: 'Australia/Tasmania'),
-  const _Timezone(zoneId: 'Australia/Victoria'),
-  const _Timezone(zoneId: 'Australia/West'),
-  const _Timezone(zoneId: 'Australia/Yancowinna'),
-  const _Timezone(zoneId: 'Brazil/Acre'),
-  const _Timezone(zoneId: 'Brazil/DeNoronha'),
-  const _Timezone(zoneId: 'Brazil/East'),
-  const _Timezone(zoneId: 'Brazil/West'),
-  const _Timezone(zoneId: 'CET'),
-  const _Timezone(zoneId: 'CST6CDT'),
-  const _Timezone(zoneId: 'Canada/Atlantic'),
-  const _Timezone(zoneId: 'Canada/Central'),
-  const _Timezone(zoneId: 'Canada/East-Saskatchewan'),
-  const _Timezone(zoneId: 'Canada/Eastern'),
-  const _Timezone(zoneId: 'Canada/Mountain'),
-  const _Timezone(zoneId: 'Canada/Newfoundland'),
-  const _Timezone(zoneId: 'Canada/Pacific'),
-  const _Timezone(zoneId: 'Canada/Saskatchewan'),
-  const _Timezone(zoneId: 'Canada/Yukon'),
-  const _Timezone(zoneId: 'Chile/Continental'),
-  const _Timezone(zoneId: 'Chile/EasterIsland'),
-  const _Timezone(zoneId: 'Cuba'),
-  const _Timezone(zoneId: 'EET'),
-  const _Timezone(zoneId: 'EST'),
-  const _Timezone(zoneId: 'EST5EDT'),
-  const _Timezone(zoneId: 'Egypt'),
-  const _Timezone(zoneId: 'Eire'),
-  const _Timezone(zoneId: 'Etc/GMT'),
-  const _Timezone(zoneId: 'Etc/GMT+0'),
-  const _Timezone(zoneId: 'Etc/GMT+1'),
-  const _Timezone(zoneId: 'Etc/GMT+10'),
-  const _Timezone(zoneId: 'Etc/GMT+11'),
-  const _Timezone(zoneId: 'Etc/GMT+12'),
-  const _Timezone(zoneId: 'Etc/GMT+2'),
-  const _Timezone(zoneId: 'Etc/GMT+3'),
-  const _Timezone(zoneId: 'Etc/GMT+4'),
-  const _Timezone(zoneId: 'Etc/GMT+5'),
-  const _Timezone(zoneId: 'Etc/GMT+6'),
-  const _Timezone(zoneId: 'Etc/GMT+7'),
-  const _Timezone(zoneId: 'Etc/GMT+8'),
-  const _Timezone(zoneId: 'Etc/GMT+9'),
-  const _Timezone(zoneId: 'Etc/GMT-0'),
-  const _Timezone(zoneId: 'Etc/GMT-1'),
-  const _Timezone(zoneId: 'Etc/GMT-10'),
-  const _Timezone(zoneId: 'Etc/GMT-11'),
-  const _Timezone(zoneId: 'Etc/GMT-12'),
-  const _Timezone(zoneId: 'Etc/GMT-13'),
-  const _Timezone(zoneId: 'Etc/GMT-14'),
-  const _Timezone(zoneId: 'Etc/GMT-2'),
-  const _Timezone(zoneId: 'Etc/GMT-3'),
-  const _Timezone(zoneId: 'Etc/GMT-4'),
-  const _Timezone(zoneId: 'Etc/GMT-5'),
-  const _Timezone(zoneId: 'Etc/GMT-6'),
-  const _Timezone(zoneId: 'Etc/GMT-7'),
-  const _Timezone(zoneId: 'Etc/GMT-8'),
-  const _Timezone(zoneId: 'Etc/GMT-9'),
-  const _Timezone(zoneId: 'Etc/GMT0'),
-  const _Timezone(zoneId: 'Etc/Greenwich'),
-  const _Timezone(zoneId: 'Etc/UCT'),
-  const _Timezone(zoneId: 'Etc/UTC'),
-  const _Timezone(zoneId: 'Etc/Universal'),
-  const _Timezone(zoneId: 'Etc/Zulu'),
-  const _Timezone(zoneId: 'Europe/Amsterdam'),
-  const _Timezone(zoneId: 'Europe/Andorra'),
-  const _Timezone(zoneId: 'Europe/Athens'),
-  const _Timezone(zoneId: 'Europe/Belfast'),
-  const _Timezone(zoneId: 'Europe/Belgrade'),
-  const _Timezone(zoneId: 'Europe/Berlin'),
-  const _Timezone(zoneId: 'Europe/Bratislava'),
-  const _Timezone(zoneId: 'Europe/Brussels'),
-  const _Timezone(zoneId: 'Europe/Bucharest'),
-  const _Timezone(zoneId: 'Europe/Budapest'),
-  const _Timezone(zoneId: 'Europe/Chisinau'),
-  const _Timezone(zoneId: 'Europe/Copenhagen'),
-  const _Timezone(zoneId: 'Europe/Dublin'),
-  const _Timezone(zoneId: 'Europe/Gibraltar'),
-  const _Timezone(zoneId: 'Europe/Guernsey'),
-  const _Timezone(zoneId: 'Europe/Helsinki'),
-  const _Timezone(zoneId: 'Europe/Isle_of_Man'),
-  const _Timezone(zoneId: 'Europe/Istanbul'),
-  const _Timezone(zoneId: 'Europe/Jersey'),
-  const _Timezone(zoneId: 'Europe/Kaliningrad'),
-  const _Timezone(zoneId: 'Europe/Kiev'),
-  const _Timezone(zoneId: 'Europe/Lisbon'),
-  const _Timezone(zoneId: 'Europe/Ljubljana'),
-  const _Timezone(zoneId: 'Europe/London'),
-  const _Timezone(zoneId: 'Europe/Luxembourg'),
-  const _Timezone(zoneId: 'Europe/Madrid'),
-  const _Timezone(zoneId: 'Europe/Malta'),
-  const _Timezone(zoneId: 'Europe/Mariehamn'),
-  const _Timezone(zoneId: 'Europe/Minsk'),
-  const _Timezone(zoneId: 'Europe/Monaco'),
-  const _Timezone(zoneId: 'Europe/Moscow'),
-  const _Timezone(zoneId: 'Europe/Nicosia'),
-  const _Timezone(zoneId: 'Europe/Oslo'),
-  const _Timezone(zoneId: 'Europe/Podgorica'),
-  const _Timezone(zoneId: 'Europe/Prague'),
-  const _Timezone(zoneId: 'Europe/Riga'),
-  const _Timezone(zoneId: 'Europe/Rome'),
-  const _Timezone(zoneId: 'Europe/Samara'),
-  const _Timezone(zoneId: 'Europe/San_Marino'),
-  const _Timezone(zoneId: 'Europe/Sarajevo'),
-  const _Timezone(zoneId: 'Europe/Simferopol'),
-  const _Timezone(zoneId: 'Europe/Skopje'),
-  const _Timezone(zoneId: 'Europe/Sofia'),
-  const _Timezone(zoneId: 'Europe/Stockholm'),
-  const _Timezone(zoneId: 'Europe/Tallinn'),
-  const _Timezone(zoneId: 'Europe/Tirane'),
-  const _Timezone(zoneId: 'Europe/Tiraspol'),
-  const _Timezone(zoneId: 'Europe/Uzhgorod'),
-  const _Timezone(zoneId: 'Europe/Vaduz'),
-  const _Timezone(zoneId: 'Europe/Vatican'),
-  const _Timezone(zoneId: 'Europe/Vienna'),
-  const _Timezone(zoneId: 'Europe/Vilnius'),
-  const _Timezone(zoneId: 'Europe/Volgograd'),
-  const _Timezone(zoneId: 'Europe/Warsaw'),
-  const _Timezone(zoneId: 'Europe/Zagreb'),
-  const _Timezone(zoneId: 'Europe/Zaporozhye'),
-  const _Timezone(zoneId: 'Europe/Zurich'),
-  const _Timezone(zoneId: 'Factory'),
-  const _Timezone(zoneId: 'GB'),
-  const _Timezone(zoneId: 'GB-Eire'),
-  const _Timezone(zoneId: 'GMT'),
-  const _Timezone(zoneId: 'GMT+0'),
-  const _Timezone(zoneId: 'GMT-0'),
-  const _Timezone(zoneId: 'GMT0'),
-  const _Timezone(zoneId: 'Greenwich'),
-  const _Timezone(zoneId: 'HST'),
-  const _Timezone(zoneId: 'Hongkong'),
-  const _Timezone(zoneId: 'Iceland'),
-  const _Timezone(zoneId: 'Indian/Antananarivo'),
-  const _Timezone(zoneId: 'Indian/Chagos'),
-  const _Timezone(zoneId: 'Indian/Christmas'),
-  const _Timezone(zoneId: 'Indian/Cocos'),
-  const _Timezone(zoneId: 'Indian/Comoro'),
-  const _Timezone(zoneId: 'Indian/Kerguelen'),
-  const _Timezone(zoneId: 'Indian/Mahe'),
-  const _Timezone(zoneId: 'Indian/Maldives'),
-  const _Timezone(zoneId: 'Indian/Mauritius'),
-  const _Timezone(zoneId: 'Indian/Mayotte'),
-  const _Timezone(zoneId: 'Indian/Reunion'),
-  const _Timezone(zoneId: 'Iran'),
-  const _Timezone(zoneId: 'Israel'),
-  const _Timezone(zoneId: 'Jamaica'),
-  const _Timezone(zoneId: 'Japan'),
-  const _Timezone(zoneId: 'Kwajalein'),
-  const _Timezone(zoneId: 'Libya'),
-  const _Timezone(zoneId: 'MET'),
-  const _Timezone(zoneId: 'MST'),
-  const _Timezone(zoneId: 'MST7MDT'),
-  const _Timezone(zoneId: 'Mexico/BajaNorte'),
-  const _Timezone(zoneId: 'Mexico/BajaSur'),
-  const _Timezone(zoneId: 'Mexico/General'),
-  const _Timezone(zoneId: 'Mideast/Riyadh87'),
-  const _Timezone(zoneId: 'Mideast/Riyadh88'),
-  const _Timezone(zoneId: 'Mideast/Riyadh89'),
-  const _Timezone(zoneId: 'NZ'),
-  const _Timezone(zoneId: 'NZ-CHAT'),
-  const _Timezone(zoneId: 'Navajo'),
-  const _Timezone(zoneId: 'PRC'),
-  const _Timezone(zoneId: 'PST8PDT'),
-  const _Timezone(zoneId: 'Pacific/Apia'),
-  const _Timezone(zoneId: 'Pacific/Auckland'),
-  const _Timezone(zoneId: 'Pacific/Chatham'),
-  const _Timezone(zoneId: 'Pacific/Easter'),
-  const _Timezone(zoneId: 'Pacific/Efate'),
-  const _Timezone(zoneId: 'Pacific/Enderbury'),
-  const _Timezone(zoneId: 'Pacific/Fakaofo'),
-  const _Timezone(zoneId: 'Pacific/Fiji'),
-  const _Timezone(zoneId: 'Pacific/Funafuti'),
-  const _Timezone(zoneId: 'Pacific/Galapagos'),
-  const _Timezone(zoneId: 'Pacific/Gambier'),
-  const _Timezone(zoneId: 'Pacific/Guadalcanal'),
-  const _Timezone(zoneId: 'Pacific/Guam'),
-  const _Timezone(zoneId: 'Pacific/Honolulu'),
-  const _Timezone(zoneId: 'Pacific/Johnston'),
-  const _Timezone(zoneId: 'Pacific/Kiritimati'),
-  const _Timezone(zoneId: 'Pacific/Kosrae'),
-  const _Timezone(zoneId: 'Pacific/Kwajalein'),
-  const _Timezone(zoneId: 'Pacific/Majuro'),
-  const _Timezone(zoneId: 'Pacific/Marquesas'),
-  const _Timezone(zoneId: 'Pacific/Midway'),
-  const _Timezone(zoneId: 'Pacific/Nauru'),
-  const _Timezone(zoneId: 'Pacific/Niue'),
-  const _Timezone(zoneId: 'Pacific/Norfolk'),
-  const _Timezone(zoneId: 'Pacific/Noumea'),
-  const _Timezone(zoneId: 'Pacific/Pago_Pago'),
-  const _Timezone(zoneId: 'Pacific/Palau'),
-  const _Timezone(zoneId: 'Pacific/Pitcairn'),
-  const _Timezone(zoneId: 'Pacific/Ponape'),
-  const _Timezone(zoneId: 'Pacific/Port_Moresby'),
-  const _Timezone(zoneId: 'Pacific/Rarotonga'),
-  const _Timezone(zoneId: 'Pacific/Saipan'),
-  const _Timezone(zoneId: 'Pacific/Samoa'),
-  const _Timezone(zoneId: 'Pacific/Tahiti'),
-  const _Timezone(zoneId: 'Pacific/Tarawa'),
-  const _Timezone(zoneId: 'Pacific/Tongatapu'),
-  const _Timezone(zoneId: 'Pacific/Truk'),
-  const _Timezone(zoneId: 'Pacific/Wake'),
-  const _Timezone(zoneId: 'Pacific/Wallis'),
-  const _Timezone(zoneId: 'Pacific/Yap'),
-  const _Timezone(zoneId: 'Poland'),
-  const _Timezone(zoneId: 'Portugal'),
-  const _Timezone(zoneId: 'ROC'),
-  const _Timezone(zoneId: 'ROK'),
-  const _Timezone(zoneId: 'Singapore'),
-  const _Timezone(zoneId: 'Turkey'),
-  const _Timezone(zoneId: 'UCT'),
-  const _Timezone(zoneId: 'US/Alaska'),
-  const _Timezone(zoneId: 'US/Aleutian'),
-  const _Timezone(zoneId: 'US/Arizona'),
-  const _Timezone(zoneId: 'US/Central'),
-  const _Timezone(zoneId: 'US/East-Indiana'),
-  const _Timezone(zoneId: 'US/Hawaii'),
-  const _Timezone(zoneId: 'US/Indiana-Starke'),
-  const _Timezone(zoneId: 'US/Michigan'),
-  const _Timezone(zoneId: 'US/Mountain'),
-  const _Timezone(zoneId: 'US/Pacific'),
-  const _Timezone(zoneId: 'US/Pacific-New'),
-  const _Timezone(zoneId: 'US/Samoa'),
-  const _Timezone(zoneId: 'UTC'),
-  const _Timezone(zoneId: 'Universal'),
-  const _Timezone(zoneId: 'W-SU'),
-  const _Timezone(zoneId: 'WET'),
-  const _Timezone(zoneId: 'Zulu'),
+const List<_Timezone> _kTimeZones = <_Timezone>[
+  _Timezone(zoneId: 'US/Eastern'),
+  _Timezone(zoneId: 'US/Pacific'),
+  _Timezone(zoneId: 'Europe/Paris'),
+  _Timezone(zoneId: 'Africa/Abidjan'),
+  _Timezone(zoneId: 'Africa/Accra'),
+  _Timezone(zoneId: 'Africa/Addis_Ababa'),
+  _Timezone(zoneId: 'Africa/Algiers'),
+  _Timezone(zoneId: 'Africa/Asmara'),
+  _Timezone(zoneId: 'Africa/Asmera'),
+  _Timezone(zoneId: 'Africa/Bamako'),
+  _Timezone(zoneId: 'Africa/Bangui'),
+  _Timezone(zoneId: 'Africa/Banjul'),
+  _Timezone(zoneId: 'Africa/Bissau'),
+  _Timezone(zoneId: 'Africa/Blantyre'),
+  _Timezone(zoneId: 'Africa/Brazzaville'),
+  _Timezone(zoneId: 'Africa/Bujumbura'),
+  _Timezone(zoneId: 'Africa/Cairo'),
+  _Timezone(zoneId: 'Africa/Casablanca'),
+  _Timezone(zoneId: 'Africa/Ceuta'),
+  _Timezone(zoneId: 'Africa/Conakry'),
+  _Timezone(zoneId: 'Africa/Dakar'),
+  _Timezone(zoneId: 'Africa/Dar_es_Salaam'),
+  _Timezone(zoneId: 'Africa/Djibouti'),
+  _Timezone(zoneId: 'Africa/Douala'),
+  _Timezone(zoneId: 'Africa/El_Aaiun'),
+  _Timezone(zoneId: 'Africa/Freetown'),
+  _Timezone(zoneId: 'Africa/Gaborone'),
+  _Timezone(zoneId: 'Africa/Harare'),
+  _Timezone(zoneId: 'Africa/Johannesburg'),
+  _Timezone(zoneId: 'Africa/Kampala'),
+  _Timezone(zoneId: 'Africa/Khartoum'),
+  _Timezone(zoneId: 'Africa/Kigali'),
+  _Timezone(zoneId: 'Africa/Kinshasa'),
+  _Timezone(zoneId: 'Africa/Lagos'),
+  _Timezone(zoneId: 'Africa/Libreville'),
+  _Timezone(zoneId: 'Africa/Lome'),
+  _Timezone(zoneId: 'Africa/Luanda'),
+  _Timezone(zoneId: 'Africa/Lubumbashi'),
+  _Timezone(zoneId: 'Africa/Lusaka'),
+  _Timezone(zoneId: 'Africa/Malabo'),
+  _Timezone(zoneId: 'Africa/Maputo'),
+  _Timezone(zoneId: 'Africa/Maseru'),
+  _Timezone(zoneId: 'Africa/Mbabane'),
+  _Timezone(zoneId: 'Africa/Mogadishu'),
+  _Timezone(zoneId: 'Africa/Monrovia'),
+  _Timezone(zoneId: 'Africa/Nairobi'),
+  _Timezone(zoneId: 'Africa/Ndjamena'),
+  _Timezone(zoneId: 'Africa/Niamey'),
+  _Timezone(zoneId: 'Africa/Nouakchott'),
+  _Timezone(zoneId: 'Africa/Ouagadougou'),
+  _Timezone(zoneId: 'Africa/Porto-Novo'),
+  _Timezone(zoneId: 'Africa/Sao_Tome'),
+  _Timezone(zoneId: 'Africa/Timbuktu'),
+  _Timezone(zoneId: 'Africa/Tripoli'),
+  _Timezone(zoneId: 'Africa/Tunis'),
+  _Timezone(zoneId: 'Africa/Windhoek'),
+  _Timezone(zoneId: 'America/Adak'),
+  _Timezone(zoneId: 'America/Anchorage'),
+  _Timezone(zoneId: 'America/Anguilla'),
+  _Timezone(zoneId: 'America/Antigua'),
+  _Timezone(zoneId: 'America/Araguaina'),
+  _Timezone(zoneId: 'America/Argentina/Buenos_Aires'),
+  _Timezone(zoneId: 'America/Argentina/Catamarca'),
+  _Timezone(zoneId: 'America/Argentina/ComodRivadavia'),
+  _Timezone(zoneId: 'America/Argentina/Cordoba'),
+  _Timezone(zoneId: 'America/Argentina/Jujuy'),
+  _Timezone(zoneId: 'America/Argentina/La_Rioja'),
+  _Timezone(zoneId: 'America/Argentina/Mendoza'),
+  _Timezone(zoneId: 'America/Argentina/Rio_Gallegos'),
+  _Timezone(zoneId: 'America/Argentina/San_Juan'),
+  _Timezone(zoneId: 'America/Argentina/Tucuman'),
+  _Timezone(zoneId: 'America/Argentina/Ushuaia'),
+  _Timezone(zoneId: 'America/Aruba'),
+  _Timezone(zoneId: 'America/Asuncion'),
+  _Timezone(zoneId: 'America/Atikokan'),
+  _Timezone(zoneId: 'America/Atka'),
+  _Timezone(zoneId: 'America/Bahia'),
+  _Timezone(zoneId: 'America/Barbados'),
+  _Timezone(zoneId: 'America/Belem'),
+  _Timezone(zoneId: 'America/Belize'),
+  _Timezone(zoneId: 'America/Blanc-Sablon'),
+  _Timezone(zoneId: 'America/Boa_Vista'),
+  _Timezone(zoneId: 'America/Bogota'),
+  _Timezone(zoneId: 'America/Boise'),
+  _Timezone(zoneId: 'America/Buenos_Aires'),
+  _Timezone(zoneId: 'America/Cambridge_Bay'),
+  _Timezone(zoneId: 'America/Campo_Grande'),
+  _Timezone(zoneId: 'America/Cancun'),
+  _Timezone(zoneId: 'America/Caracas'),
+  _Timezone(zoneId: 'America/Catamarca'),
+  _Timezone(zoneId: 'America/Cayenne'),
+  _Timezone(zoneId: 'America/Cayman'),
+  _Timezone(zoneId: 'America/Chicago'),
+  _Timezone(zoneId: 'America/Chihuahua'),
+  _Timezone(zoneId: 'America/Coral_Harbour'),
+  _Timezone(zoneId: 'America/Cordoba'),
+  _Timezone(zoneId: 'America/Costa_Rica'),
+  _Timezone(zoneId: 'America/Cuiaba'),
+  _Timezone(zoneId: 'America/Curacao'),
+  _Timezone(zoneId: 'America/Danmarkshavn'),
+  _Timezone(zoneId: 'America/Dawson'),
+  _Timezone(zoneId: 'America/Dawson_Creek'),
+  _Timezone(zoneId: 'America/Denver'),
+  _Timezone(zoneId: 'America/Detroit'),
+  _Timezone(zoneId: 'America/Dominica'),
+  _Timezone(zoneId: 'America/Edmonton'),
+  _Timezone(zoneId: 'America/Eirunepe'),
+  _Timezone(zoneId: 'America/El_Salvador'),
+  _Timezone(zoneId: 'America/Ensenada'),
+  _Timezone(zoneId: 'America/Fort_Wayne'),
+  _Timezone(zoneId: 'America/Fortaleza'),
+  _Timezone(zoneId: 'America/Glace_Bay'),
+  _Timezone(zoneId: 'America/Godthab'),
+  _Timezone(zoneId: 'America/Goose_Bay'),
+  _Timezone(zoneId: 'America/Grand_Turk'),
+  _Timezone(zoneId: 'America/Grenada'),
+  _Timezone(zoneId: 'America/Guadeloupe'),
+  _Timezone(zoneId: 'America/Guatemala'),
+  _Timezone(zoneId: 'America/Guayaquil'),
+  _Timezone(zoneId: 'America/Guyana'),
+  _Timezone(zoneId: 'America/Halifax'),
+  _Timezone(zoneId: 'America/Havana'),
+  _Timezone(zoneId: 'America/Hermosillo'),
+  _Timezone(zoneId: 'America/Indiana/Indianapolis'),
+  _Timezone(zoneId: 'America/Indiana/Knox'),
+  _Timezone(zoneId: 'America/Indiana/Marengo'),
+  _Timezone(zoneId: 'America/Indiana/Petersburg'),
+  _Timezone(zoneId: 'America/Indiana/Tell_City'),
+  _Timezone(zoneId: 'America/Indiana/Vevay'),
+  _Timezone(zoneId: 'America/Indiana/Vincennes'),
+  _Timezone(zoneId: 'America/Indiana/Winamac'),
+  _Timezone(zoneId: 'America/Indianapolis'),
+  _Timezone(zoneId: 'America/Inuvik'),
+  _Timezone(zoneId: 'America/Iqaluit'),
+  _Timezone(zoneId: 'America/Jamaica'),
+  _Timezone(zoneId: 'America/Jujuy'),
+  _Timezone(zoneId: 'America/Juneau'),
+  _Timezone(zoneId: 'America/Kentucky/Louisville'),
+  _Timezone(zoneId: 'America/Kentucky/Monticello'),
+  _Timezone(zoneId: 'America/Knox_IN'),
+  _Timezone(zoneId: 'America/La_Paz'),
+  _Timezone(zoneId: 'America/Lima'),
+  _Timezone(zoneId: 'America/Los_Angeles'),
+  _Timezone(zoneId: 'America/Louisville'),
+  _Timezone(zoneId: 'America/Maceio'),
+  _Timezone(zoneId: 'America/Managua'),
+  _Timezone(zoneId: 'America/Manaus'),
+  _Timezone(zoneId: 'America/Marigot'),
+  _Timezone(zoneId: 'America/Martinique'),
+  _Timezone(zoneId: 'America/Mazatlan'),
+  _Timezone(zoneId: 'America/Mendoza'),
+  _Timezone(zoneId: 'America/Menominee'),
+  _Timezone(zoneId: 'America/Merida'),
+  _Timezone(zoneId: 'America/Mexico_City'),
+  _Timezone(zoneId: 'America/Miquelon'),
+  _Timezone(zoneId: 'America/Moncton'),
+  _Timezone(zoneId: 'America/Monterrey'),
+  _Timezone(zoneId: 'America/Montevideo'),
+  _Timezone(zoneId: 'America/Montreal'),
+  _Timezone(zoneId: 'America/Montserrat'),
+  _Timezone(zoneId: 'America/Nassau'),
+  _Timezone(zoneId: 'America/New_York'),
+  _Timezone(zoneId: 'America/Nipigon'),
+  _Timezone(zoneId: 'America/Nome'),
+  _Timezone(zoneId: 'America/Noronha'),
+  _Timezone(zoneId: 'America/North_Dakota/Center'),
+  _Timezone(zoneId: 'America/North_Dakota/New_Salem'),
+  _Timezone(zoneId: 'America/Panama'),
+  _Timezone(zoneId: 'America/Pangnirtung'),
+  _Timezone(zoneId: 'America/Paramaribo'),
+  _Timezone(zoneId: 'America/Phoenix'),
+  _Timezone(zoneId: 'America/Port-au-Prince'),
+  _Timezone(zoneId: 'America/Port_of_Spain'),
+  _Timezone(zoneId: 'America/Porto_Acre'),
+  _Timezone(zoneId: 'America/Porto_Velho'),
+  _Timezone(zoneId: 'America/Puerto_Rico'),
+  _Timezone(zoneId: 'America/Rainy_River'),
+  _Timezone(zoneId: 'America/Rankin_Inlet'),
+  _Timezone(zoneId: 'America/Recife'),
+  _Timezone(zoneId: 'America/Regina'),
+  _Timezone(zoneId: 'America/Resolute'),
+  _Timezone(zoneId: 'America/Rio_Branco'),
+  _Timezone(zoneId: 'America/Rosario'),
+  _Timezone(zoneId: 'America/Santiago'),
+  _Timezone(zoneId: 'America/Santo_Domingo'),
+  _Timezone(zoneId: 'America/Sao_Paulo'),
+  _Timezone(zoneId: 'America/Scoresbysund'),
+  _Timezone(zoneId: 'America/Shiprock'),
+  _Timezone(zoneId: 'America/St_Barthelemy'),
+  _Timezone(zoneId: 'America/St_Johns'),
+  _Timezone(zoneId: 'America/St_Kitts'),
+  _Timezone(zoneId: 'America/St_Lucia'),
+  _Timezone(zoneId: 'America/St_Thomas'),
+  _Timezone(zoneId: 'America/St_Vincent'),
+  _Timezone(zoneId: 'America/Swift_Current'),
+  _Timezone(zoneId: 'America/Tegucigalpa'),
+  _Timezone(zoneId: 'America/Thule'),
+  _Timezone(zoneId: 'America/Thunder_Bay'),
+  _Timezone(zoneId: 'America/Tijuana'),
+  _Timezone(zoneId: 'America/Toronto'),
+  _Timezone(zoneId: 'America/Tortola'),
+  _Timezone(zoneId: 'America/Vancouver'),
+  _Timezone(zoneId: 'America/Virgin'),
+  _Timezone(zoneId: 'America/Whitehorse'),
+  _Timezone(zoneId: 'America/Winnipeg'),
+  _Timezone(zoneId: 'America/Yakutat'),
+  _Timezone(zoneId: 'America/Yellowknife'),
+  _Timezone(zoneId: 'Antarctica/Casey'),
+  _Timezone(zoneId: 'Antarctica/Davis'),
+  _Timezone(zoneId: 'Antarctica/DumontDUrville'),
+  _Timezone(zoneId: 'Antarctica/Mawson'),
+  _Timezone(zoneId: 'Antarctica/McMurdo'),
+  _Timezone(zoneId: 'Antarctica/Palmer'),
+  _Timezone(zoneId: 'Antarctica/Rothera'),
+  _Timezone(zoneId: 'Antarctica/South_Pole'),
+  _Timezone(zoneId: 'Antarctica/Syowa'),
+  _Timezone(zoneId: 'Antarctica/Vostok'),
+  _Timezone(zoneId: 'Arctic/Longyearbyen'),
+  _Timezone(zoneId: 'Asia/Aden'),
+  _Timezone(zoneId: 'Asia/Almaty'),
+  _Timezone(zoneId: 'Asia/Amman'),
+  _Timezone(zoneId: 'Asia/Anadyr'),
+  _Timezone(zoneId: 'Asia/Aqtau'),
+  _Timezone(zoneId: 'Asia/Aqtobe'),
+  _Timezone(zoneId: 'Asia/Ashgabat'),
+  _Timezone(zoneId: 'Asia/Ashkhabad'),
+  _Timezone(zoneId: 'Asia/Baghdad'),
+  _Timezone(zoneId: 'Asia/Bahrain'),
+  _Timezone(zoneId: 'Asia/Baku'),
+  _Timezone(zoneId: 'Asia/Bangkok'),
+  _Timezone(zoneId: 'Asia/Beirut'),
+  _Timezone(zoneId: 'Asia/Bishkek'),
+  _Timezone(zoneId: 'Asia/Brunei'),
+  _Timezone(zoneId: 'Asia/Calcutta'),
+  _Timezone(zoneId: 'Asia/Choibalsan'),
+  _Timezone(zoneId: 'Asia/Chongqing'),
+  _Timezone(zoneId: 'Asia/Chungking'),
+  _Timezone(zoneId: 'Asia/Colombo'),
+  _Timezone(zoneId: 'Asia/Dacca'),
+  _Timezone(zoneId: 'Asia/Damascus'),
+  _Timezone(zoneId: 'Asia/Dhaka'),
+  _Timezone(zoneId: 'Asia/Dili'),
+  _Timezone(zoneId: 'Asia/Dubai'),
+  _Timezone(zoneId: 'Asia/Dushanbe'),
+  _Timezone(zoneId: 'Asia/Gaza'),
+  _Timezone(zoneId: 'Asia/Harbin'),
+  _Timezone(zoneId: 'Asia/Hong_Kong'),
+  _Timezone(zoneId: 'Asia/Hovd'),
+  _Timezone(zoneId: 'Asia/Irkutsk'),
+  _Timezone(zoneId: 'Asia/Istanbul'),
+  _Timezone(zoneId: 'Asia/Jakarta'),
+  _Timezone(zoneId: 'Asia/Jayapura'),
+  _Timezone(zoneId: 'Asia/Jerusalem'),
+  _Timezone(zoneId: 'Asia/Kabul'),
+  _Timezone(zoneId: 'Asia/Kamchatka'),
+  _Timezone(zoneId: 'Asia/Karachi'),
+  _Timezone(zoneId: 'Asia/Kashgar'),
+  _Timezone(zoneId: 'Asia/Katmandu'),
+  _Timezone(zoneId: 'Asia/Krasnoyarsk'),
+  _Timezone(zoneId: 'Asia/Kuala_Lumpur'),
+  _Timezone(zoneId: 'Asia/Kuching'),
+  _Timezone(zoneId: 'Asia/Kuwait'),
+  _Timezone(zoneId: 'Asia/Macao'),
+  _Timezone(zoneId: 'Asia/Macau'),
+  _Timezone(zoneId: 'Asia/Magadan'),
+  _Timezone(zoneId: 'Asia/Makassar'),
+  _Timezone(zoneId: 'Asia/Manila'),
+  _Timezone(zoneId: 'Asia/Muscat'),
+  _Timezone(zoneId: 'Asia/Nicosia'),
+  _Timezone(zoneId: 'Asia/Novosibirsk'),
+  _Timezone(zoneId: 'Asia/Omsk'),
+  _Timezone(zoneId: 'Asia/Oral'),
+  _Timezone(zoneId: 'Asia/Phnom_Penh'),
+  _Timezone(zoneId: 'Asia/Pontianak'),
+  _Timezone(zoneId: 'Asia/Pyongyang'),
+  _Timezone(zoneId: 'Asia/Qatar'),
+  _Timezone(zoneId: 'Asia/Qyzylorda'),
+  _Timezone(zoneId: 'Asia/Rangoon'),
+  _Timezone(zoneId: 'Asia/Riyadh'),
+  _Timezone(zoneId: 'Asia/Riyadh87'),
+  _Timezone(zoneId: 'Asia/Riyadh88'),
+  _Timezone(zoneId: 'Asia/Riyadh89'),
+  _Timezone(zoneId: 'Asia/Saigon'),
+  _Timezone(zoneId: 'Asia/Sakhalin'),
+  _Timezone(zoneId: 'Asia/Samarkand'),
+  _Timezone(zoneId: 'Asia/Seoul'),
+  _Timezone(zoneId: 'Asia/Shanghai'),
+  _Timezone(zoneId: 'Asia/Singapore'),
+  _Timezone(zoneId: 'Asia/Taipei'),
+  _Timezone(zoneId: 'Asia/Tashkent'),
+  _Timezone(zoneId: 'Asia/Tbilisi'),
+  _Timezone(zoneId: 'Asia/Tehran'),
+  _Timezone(zoneId: 'Asia/Tel_Aviv'),
+  _Timezone(zoneId: 'Asia/Thimbu'),
+  _Timezone(zoneId: 'Asia/Thimphu'),
+  _Timezone(zoneId: 'Asia/Tokyo'),
+  _Timezone(zoneId: 'Asia/Ujung_Pandang'),
+  _Timezone(zoneId: 'Asia/Ulaanbaatar'),
+  _Timezone(zoneId: 'Asia/Ulan_Bator'),
+  _Timezone(zoneId: 'Asia/Urumqi'),
+  _Timezone(zoneId: 'Asia/Vientiane'),
+  _Timezone(zoneId: 'Asia/Vladivostok'),
+  _Timezone(zoneId: 'Asia/Yakutsk'),
+  _Timezone(zoneId: 'Asia/Yekaterinburg'),
+  _Timezone(zoneId: 'Asia/Yerevan'),
+  _Timezone(zoneId: 'Atlantic/Azores'),
+  _Timezone(zoneId: 'Atlantic/Bermuda'),
+  _Timezone(zoneId: 'Atlantic/Canary'),
+  _Timezone(zoneId: 'Atlantic/Cape_Verde'),
+  _Timezone(zoneId: 'Atlantic/Faeroe'),
+  _Timezone(zoneId: 'Atlantic/Faroe'),
+  _Timezone(zoneId: 'Atlantic/Jan_Mayen'),
+  _Timezone(zoneId: 'Atlantic/Madeira'),
+  _Timezone(zoneId: 'Atlantic/Reykjavik'),
+  _Timezone(zoneId: 'Atlantic/South_Georgia'),
+  _Timezone(zoneId: 'Atlantic/St_Helena'),
+  _Timezone(zoneId: 'Atlantic/Stanley'),
+  _Timezone(zoneId: 'Australia/ACT'),
+  _Timezone(zoneId: 'Australia/Adelaide'),
+  _Timezone(zoneId: 'Australia/Brisbane'),
+  _Timezone(zoneId: 'Australia/Broken_Hill'),
+  _Timezone(zoneId: 'Australia/Canberra'),
+  _Timezone(zoneId: 'Australia/Currie'),
+  _Timezone(zoneId: 'Australia/Darwin'),
+  _Timezone(zoneId: 'Australia/Eucla'),
+  _Timezone(zoneId: 'Australia/Hobart'),
+  _Timezone(zoneId: 'Australia/LHI'),
+  _Timezone(zoneId: 'Australia/Lindeman'),
+  _Timezone(zoneId: 'Australia/Lord_Howe'),
+  _Timezone(zoneId: 'Australia/Melbourne'),
+  _Timezone(zoneId: 'Australia/NSW'),
+  _Timezone(zoneId: 'Australia/North'),
+  _Timezone(zoneId: 'Australia/Perth'),
+  _Timezone(zoneId: 'Australia/Queensland'),
+  _Timezone(zoneId: 'Australia/South'),
+  _Timezone(zoneId: 'Australia/Sydney'),
+  _Timezone(zoneId: 'Australia/Tasmania'),
+  _Timezone(zoneId: 'Australia/Victoria'),
+  _Timezone(zoneId: 'Australia/West'),
+  _Timezone(zoneId: 'Australia/Yancowinna'),
+  _Timezone(zoneId: 'Brazil/Acre'),
+  _Timezone(zoneId: 'Brazil/DeNoronha'),
+  _Timezone(zoneId: 'Brazil/East'),
+  _Timezone(zoneId: 'Brazil/West'),
+  _Timezone(zoneId: 'CET'),
+  _Timezone(zoneId: 'CST6CDT'),
+  _Timezone(zoneId: 'Canada/Atlantic'),
+  _Timezone(zoneId: 'Canada/Central'),
+  _Timezone(zoneId: 'Canada/East-Saskatchewan'),
+  _Timezone(zoneId: 'Canada/Eastern'),
+  _Timezone(zoneId: 'Canada/Mountain'),
+  _Timezone(zoneId: 'Canada/Newfoundland'),
+  _Timezone(zoneId: 'Canada/Pacific'),
+  _Timezone(zoneId: 'Canada/Saskatchewan'),
+  _Timezone(zoneId: 'Canada/Yukon'),
+  _Timezone(zoneId: 'Chile/Continental'),
+  _Timezone(zoneId: 'Chile/EasterIsland'),
+  _Timezone(zoneId: 'Cuba'),
+  _Timezone(zoneId: 'EET'),
+  _Timezone(zoneId: 'EST'),
+  _Timezone(zoneId: 'EST5EDT'),
+  _Timezone(zoneId: 'Egypt'),
+  _Timezone(zoneId: 'Eire'),
+  _Timezone(zoneId: 'Etc/GMT'),
+  _Timezone(zoneId: 'Etc/GMT+0'),
+  _Timezone(zoneId: 'Etc/GMT+1'),
+  _Timezone(zoneId: 'Etc/GMT+10'),
+  _Timezone(zoneId: 'Etc/GMT+11'),
+  _Timezone(zoneId: 'Etc/GMT+12'),
+  _Timezone(zoneId: 'Etc/GMT+2'),
+  _Timezone(zoneId: 'Etc/GMT+3'),
+  _Timezone(zoneId: 'Etc/GMT+4'),
+  _Timezone(zoneId: 'Etc/GMT+5'),
+  _Timezone(zoneId: 'Etc/GMT+6'),
+  _Timezone(zoneId: 'Etc/GMT+7'),
+  _Timezone(zoneId: 'Etc/GMT+8'),
+  _Timezone(zoneId: 'Etc/GMT+9'),
+  _Timezone(zoneId: 'Etc/GMT-0'),
+  _Timezone(zoneId: 'Etc/GMT-1'),
+  _Timezone(zoneId: 'Etc/GMT-10'),
+  _Timezone(zoneId: 'Etc/GMT-11'),
+  _Timezone(zoneId: 'Etc/GMT-12'),
+  _Timezone(zoneId: 'Etc/GMT-13'),
+  _Timezone(zoneId: 'Etc/GMT-14'),
+  _Timezone(zoneId: 'Etc/GMT-2'),
+  _Timezone(zoneId: 'Etc/GMT-3'),
+  _Timezone(zoneId: 'Etc/GMT-4'),
+  _Timezone(zoneId: 'Etc/GMT-5'),
+  _Timezone(zoneId: 'Etc/GMT-6'),
+  _Timezone(zoneId: 'Etc/GMT-7'),
+  _Timezone(zoneId: 'Etc/GMT-8'),
+  _Timezone(zoneId: 'Etc/GMT-9'),
+  _Timezone(zoneId: 'Etc/GMT0'),
+  _Timezone(zoneId: 'Etc/Greenwich'),
+  _Timezone(zoneId: 'Etc/UCT'),
+  _Timezone(zoneId: 'Etc/UTC'),
+  _Timezone(zoneId: 'Etc/Universal'),
+  _Timezone(zoneId: 'Etc/Zulu'),
+  _Timezone(zoneId: 'Europe/Amsterdam'),
+  _Timezone(zoneId: 'Europe/Andorra'),
+  _Timezone(zoneId: 'Europe/Athens'),
+  _Timezone(zoneId: 'Europe/Belfast'),
+  _Timezone(zoneId: 'Europe/Belgrade'),
+  _Timezone(zoneId: 'Europe/Berlin'),
+  _Timezone(zoneId: 'Europe/Bratislava'),
+  _Timezone(zoneId: 'Europe/Brussels'),
+  _Timezone(zoneId: 'Europe/Bucharest'),
+  _Timezone(zoneId: 'Europe/Budapest'),
+  _Timezone(zoneId: 'Europe/Chisinau'),
+  _Timezone(zoneId: 'Europe/Copenhagen'),
+  _Timezone(zoneId: 'Europe/Dublin'),
+  _Timezone(zoneId: 'Europe/Gibraltar'),
+  _Timezone(zoneId: 'Europe/Guernsey'),
+  _Timezone(zoneId: 'Europe/Helsinki'),
+  _Timezone(zoneId: 'Europe/Isle_of_Man'),
+  _Timezone(zoneId: 'Europe/Istanbul'),
+  _Timezone(zoneId: 'Europe/Jersey'),
+  _Timezone(zoneId: 'Europe/Kaliningrad'),
+  _Timezone(zoneId: 'Europe/Kiev'),
+  _Timezone(zoneId: 'Europe/Lisbon'),
+  _Timezone(zoneId: 'Europe/Ljubljana'),
+  _Timezone(zoneId: 'Europe/London'),
+  _Timezone(zoneId: 'Europe/Luxembourg'),
+  _Timezone(zoneId: 'Europe/Madrid'),
+  _Timezone(zoneId: 'Europe/Malta'),
+  _Timezone(zoneId: 'Europe/Mariehamn'),
+  _Timezone(zoneId: 'Europe/Minsk'),
+  _Timezone(zoneId: 'Europe/Monaco'),
+  _Timezone(zoneId: 'Europe/Moscow'),
+  _Timezone(zoneId: 'Europe/Nicosia'),
+  _Timezone(zoneId: 'Europe/Oslo'),
+  _Timezone(zoneId: 'Europe/Podgorica'),
+  _Timezone(zoneId: 'Europe/Prague'),
+  _Timezone(zoneId: 'Europe/Riga'),
+  _Timezone(zoneId: 'Europe/Rome'),
+  _Timezone(zoneId: 'Europe/Samara'),
+  _Timezone(zoneId: 'Europe/San_Marino'),
+  _Timezone(zoneId: 'Europe/Sarajevo'),
+  _Timezone(zoneId: 'Europe/Simferopol'),
+  _Timezone(zoneId: 'Europe/Skopje'),
+  _Timezone(zoneId: 'Europe/Sofia'),
+  _Timezone(zoneId: 'Europe/Stockholm'),
+  _Timezone(zoneId: 'Europe/Tallinn'),
+  _Timezone(zoneId: 'Europe/Tirane'),
+  _Timezone(zoneId: 'Europe/Tiraspol'),
+  _Timezone(zoneId: 'Europe/Uzhgorod'),
+  _Timezone(zoneId: 'Europe/Vaduz'),
+  _Timezone(zoneId: 'Europe/Vatican'),
+  _Timezone(zoneId: 'Europe/Vienna'),
+  _Timezone(zoneId: 'Europe/Vilnius'),
+  _Timezone(zoneId: 'Europe/Volgograd'),
+  _Timezone(zoneId: 'Europe/Warsaw'),
+  _Timezone(zoneId: 'Europe/Zagreb'),
+  _Timezone(zoneId: 'Europe/Zaporozhye'),
+  _Timezone(zoneId: 'Europe/Zurich'),
+  _Timezone(zoneId: 'Factory'),
+  _Timezone(zoneId: 'GB'),
+  _Timezone(zoneId: 'GB-Eire'),
+  _Timezone(zoneId: 'GMT'),
+  _Timezone(zoneId: 'GMT+0'),
+  _Timezone(zoneId: 'GMT-0'),
+  _Timezone(zoneId: 'GMT0'),
+  _Timezone(zoneId: 'Greenwich'),
+  _Timezone(zoneId: 'HST'),
+  _Timezone(zoneId: 'Hongkong'),
+  _Timezone(zoneId: 'Iceland'),
+  _Timezone(zoneId: 'Indian/Antananarivo'),
+  _Timezone(zoneId: 'Indian/Chagos'),
+  _Timezone(zoneId: 'Indian/Christmas'),
+  _Timezone(zoneId: 'Indian/Cocos'),
+  _Timezone(zoneId: 'Indian/Comoro'),
+  _Timezone(zoneId: 'Indian/Kerguelen'),
+  _Timezone(zoneId: 'Indian/Mahe'),
+  _Timezone(zoneId: 'Indian/Maldives'),
+  _Timezone(zoneId: 'Indian/Mauritius'),
+  _Timezone(zoneId: 'Indian/Mayotte'),
+  _Timezone(zoneId: 'Indian/Reunion'),
+  _Timezone(zoneId: 'Iran'),
+  _Timezone(zoneId: 'Israel'),
+  _Timezone(zoneId: 'Jamaica'),
+  _Timezone(zoneId: 'Japan'),
+  _Timezone(zoneId: 'Kwajalein'),
+  _Timezone(zoneId: 'Libya'),
+  _Timezone(zoneId: 'MET'),
+  _Timezone(zoneId: 'MST'),
+  _Timezone(zoneId: 'MST7MDT'),
+  _Timezone(zoneId: 'Mexico/BajaNorte'),
+  _Timezone(zoneId: 'Mexico/BajaSur'),
+  _Timezone(zoneId: 'Mexico/General'),
+  _Timezone(zoneId: 'Mideast/Riyadh87'),
+  _Timezone(zoneId: 'Mideast/Riyadh88'),
+  _Timezone(zoneId: 'Mideast/Riyadh89'),
+  _Timezone(zoneId: 'NZ'),
+  _Timezone(zoneId: 'NZ-CHAT'),
+  _Timezone(zoneId: 'Navajo'),
+  _Timezone(zoneId: 'PRC'),
+  _Timezone(zoneId: 'PST8PDT'),
+  _Timezone(zoneId: 'Pacific/Apia'),
+  _Timezone(zoneId: 'Pacific/Auckland'),
+  _Timezone(zoneId: 'Pacific/Chatham'),
+  _Timezone(zoneId: 'Pacific/Easter'),
+  _Timezone(zoneId: 'Pacific/Efate'),
+  _Timezone(zoneId: 'Pacific/Enderbury'),
+  _Timezone(zoneId: 'Pacific/Fakaofo'),
+  _Timezone(zoneId: 'Pacific/Fiji'),
+  _Timezone(zoneId: 'Pacific/Funafuti'),
+  _Timezone(zoneId: 'Pacific/Galapagos'),
+  _Timezone(zoneId: 'Pacific/Gambier'),
+  _Timezone(zoneId: 'Pacific/Guadalcanal'),
+  _Timezone(zoneId: 'Pacific/Guam'),
+  _Timezone(zoneId: 'Pacific/Honolulu'),
+  _Timezone(zoneId: 'Pacific/Johnston'),
+  _Timezone(zoneId: 'Pacific/Kiritimati'),
+  _Timezone(zoneId: 'Pacific/Kosrae'),
+  _Timezone(zoneId: 'Pacific/Kwajalein'),
+  _Timezone(zoneId: 'Pacific/Majuro'),
+  _Timezone(zoneId: 'Pacific/Marquesas'),
+  _Timezone(zoneId: 'Pacific/Midway'),
+  _Timezone(zoneId: 'Pacific/Nauru'),
+  _Timezone(zoneId: 'Pacific/Niue'),
+  _Timezone(zoneId: 'Pacific/Norfolk'),
+  _Timezone(zoneId: 'Pacific/Noumea'),
+  _Timezone(zoneId: 'Pacific/Pago_Pago'),
+  _Timezone(zoneId: 'Pacific/Palau'),
+  _Timezone(zoneId: 'Pacific/Pitcairn'),
+  _Timezone(zoneId: 'Pacific/Ponape'),
+  _Timezone(zoneId: 'Pacific/Port_Moresby'),
+  _Timezone(zoneId: 'Pacific/Rarotonga'),
+  _Timezone(zoneId: 'Pacific/Saipan'),
+  _Timezone(zoneId: 'Pacific/Samoa'),
+  _Timezone(zoneId: 'Pacific/Tahiti'),
+  _Timezone(zoneId: 'Pacific/Tarawa'),
+  _Timezone(zoneId: 'Pacific/Tongatapu'),
+  _Timezone(zoneId: 'Pacific/Truk'),
+  _Timezone(zoneId: 'Pacific/Wake'),
+  _Timezone(zoneId: 'Pacific/Wallis'),
+  _Timezone(zoneId: 'Pacific/Yap'),
+  _Timezone(zoneId: 'Poland'),
+  _Timezone(zoneId: 'Portugal'),
+  _Timezone(zoneId: 'ROC'),
+  _Timezone(zoneId: 'ROK'),
+  _Timezone(zoneId: 'Singapore'),
+  _Timezone(zoneId: 'Turkey'),
+  _Timezone(zoneId: 'UCT'),
+  _Timezone(zoneId: 'US/Alaska'),
+  _Timezone(zoneId: 'US/Aleutian'),
+  _Timezone(zoneId: 'US/Arizona'),
+  _Timezone(zoneId: 'US/Central'),
+  _Timezone(zoneId: 'US/East-Indiana'),
+  _Timezone(zoneId: 'US/Hawaii'),
+  _Timezone(zoneId: 'US/Indiana-Starke'),
+  _Timezone(zoneId: 'US/Michigan'),
+  _Timezone(zoneId: 'US/Mountain'),
+  _Timezone(zoneId: 'US/Pacific'),
+  _Timezone(zoneId: 'US/Pacific-New'),
+  _Timezone(zoneId: 'US/Samoa'),
+  _Timezone(zoneId: 'UTC'),
+  _Timezone(zoneId: 'Universal'),
+  _Timezone(zoneId: 'W-SU'),
+  _Timezone(zoneId: 'WET'),
+  _Timezone(zoneId: 'Zulu'),
 ];
 
 /// Callback when user picks a timezone.
@@ -595,22 +595,22 @@
         _onTap = onTap;
 
   @override
-  Widget build(BuildContext context) => new ListView.builder(
-        physics: const BouncingScrollPhysics(),
+  Widget build(BuildContext context) => ListView.builder(
+        physics: BouncingScrollPhysics(),
         itemCount: _kTimeZones.length,
-        itemBuilder: (BuildContext context, int index) => new Material(
+        itemBuilder: (BuildContext context, int index) => Material(
               color: _currentTimezoneId == _kTimeZones[index].zoneId
                   ? Colors.grey[500]
                   : Colors.transparent,
-              child: new InkWell(
+              child: InkWell(
                 onTap: () {
                   _onTap?.call(_kTimeZones[index].zoneId);
                 },
-                child: new Padding(
-                  padding: const EdgeInsets.all(8.0),
-                  child: new Text(
+                child: Padding(
+                  padding: EdgeInsets.all(8.0),
+                  child: Text(
                     '${_kTimeZones[index].zoneId}',
-                    style: const TextStyle(color: Colors.black),
+                    style: TextStyle(color: Colors.black),
                   ),
                 ),
               ),
diff --git a/lib/settings/lib/widgets.dart b/lib/settings/lib/widgets.dart
index 7bcd223..df6dd5c 100644
--- a/lib/settings/lib/widgets.dart
+++ b/lib/settings/lib/widgets.dart
@@ -106,7 +106,7 @@
             child: Container(
           width: 64.0,
           height: 64.0,
-          child: const FuchsiaSpinner(),
+          child: FuchsiaSpinner(),
         )),
       ));
       return Container(
@@ -115,7 +115,7 @@
       );
     } else {
       return ListView(
-          physics: const BouncingScrollPhysics(),
+          physics: BouncingScrollPhysics(),
           padding: verticalInsets,
           children: children..addAll(sections));
     }
diff --git a/lib/setui/common/lib/action.dart b/lib/setui/common/lib/action.dart
index e9d9f2f..ca146d6 100644
--- a/lib/setui/common/lib/action.dart
+++ b/lib/setui/common/lib/action.dart
@@ -46,7 +46,7 @@
 
   /// Called by client to return result
   void onResult(String result) {
-    callback.onResult(new ActionResult(step, result));
+    callback.onResult(ActionResult(step, result));
   }
 
   /// Called by owner to start the action
diff --git a/lib/setui/common/lib/conductor_builder.dart b/lib/setui/common/lib/conductor_builder.dart
index 833f21f..6e4e2e5 100644
--- a/lib/setui/common/lib/conductor_builder.dart
+++ b/lib/setui/common/lib/conductor_builder.dart
@@ -15,7 +15,7 @@
 /// A builder for assembling a [Conductor]. Abstracts away details surrounding
 /// the [Roster] and [Syllabus].
 class ConductorBuilder {
-  final Roster _roster = new Roster();
+  final Roster _roster = Roster();
   final File _syllabusFile;
 
   /// Constructs a builder with a [Syllabus] at the specified [File].
@@ -26,11 +26,11 @@
 
   /// Builds the [Conductor].
   Future<Conductor> build() {
-    Completer<Conductor> completer = new Completer<Conductor>();
+    Completer<Conductor> completer = Completer<Conductor>();
 
     _syllabusFile.readAsString().then((String config) {
       final Syllabus syllabus = SyllabusParser.parse(loadYamlDocuments(config));
-      completer.complete(new Conductor(syllabus, _roster));
+      completer.complete(Conductor(syllabus, _roster));
     });
 
     return completer.future;
diff --git a/lib/setui/common/lib/syllabus_parser.dart b/lib/setui/common/lib/syllabus_parser.dart
index 8fcde62..f131793 100644
--- a/lib/setui/common/lib/syllabus_parser.dart
+++ b/lib/setui/common/lib/syllabus_parser.dart
@@ -48,7 +48,7 @@
     // First pass: create steps.
     docs[1].contents.value.forEach((key, value) {
       final String action = value[_keyAction];
-      steps[key] = new Step(key, action);
+      steps[key] = Step(key, action);
     });
 
     // Second pass: link up nodes.
@@ -69,7 +69,7 @@
 
     final YamlMap metaData = docs[0].contents.value;
 
-    return new Syllabus(steps.values.toList(), steps[metaData[_keyEntry]],
+    return Syllabus(steps.values.toList(), steps[metaData[_keyEntry]],
         metaData[_keySingleUseId]);
   }
 
diff --git a/lib/setui/common/test/conductor_builder_test.dart b/lib/setui/common/test/conductor_builder_test.dart
index 4fcf23f..73da1ec 100644
--- a/lib/setui/common/test/conductor_builder_test.dart
+++ b/lib/setui/common/test/conductor_builder_test.dart
@@ -30,11 +30,11 @@
 void main() {
   // Make sure first action is launched.
   test('test_start', () async {
-    final MockFile syllabusFile = new MockFile();
-    final MockBlueprint blueprint = new MockBlueprint();
-    final MockAction action = new MockAction();
+    final MockFile syllabusFile = MockFile();
+    final MockBlueprint blueprint = MockBlueprint();
+    final MockAction action = MockAction();
 
-    final Completer<String> completer = new Completer<String>()
+    final Completer<String> completer = Completer<String>()
       ..complete(_syllabus);
 
     // Load predefined syllabus when
@@ -42,7 +42,7 @@
     when(blueprint.key).thenReturn('begin');
     when(blueprint.assemble(any, any)).thenReturn(action);
 
-    final ConductorBuilder builder = new ConductorBuilder(syllabusFile)
+    final ConductorBuilder builder = ConductorBuilder(syllabusFile)
       ..addBlueprint(blueprint);
 
     (await builder.build()).start();
diff --git a/lib/setui/common/test/conductor_test.dart b/lib/setui/common/test/conductor_test.dart
index b23f6a1..7227ab8 100644
--- a/lib/setui/common/test/conductor_test.dart
+++ b/lib/setui/common/test/conductor_test.dart
@@ -12,7 +12,7 @@
 class MockAction extends Mock implements Action<TestBlueprint> {}
 
 class TestBlueprint extends Blueprint {
-  final MockAction action = new MockAction();
+  final MockAction action = MockAction();
 
   TestBlueprint(String name) : super(name, 'TestBlueprint');
 
@@ -25,14 +25,14 @@
 void main() {
   // Make sure first action is launched.
   test('test_start', () {
-    final Step entry = new Step('step1', 'action1');
-    final TestBlueprint actionBlueprint = new TestBlueprint('action1');
+    final Step entry = Step('step1', 'action1');
+    final TestBlueprint actionBlueprint = TestBlueprint('action1');
 
-    final Syllabus syllabus = new Syllabus([entry], entry);
+    final Syllabus syllabus = Syllabus([entry], entry);
 
-    final Roster roster = new Roster()..add(actionBlueprint);
+    final Roster roster = Roster()..add(actionBlueprint);
 
-    new Conductor(syllabus, roster).start();
+    Conductor(syllabus, roster).start();
     MockAction action = actionBlueprint.action;
     verify(action.launch());
   });
@@ -40,17 +40,17 @@
   // Ensure we proceed to the next step when the current step's action is
   // missing
   test('test_advance', () {
-    final Step step2 = new Step('step2', 'action2');
-    final TestBlueprint actionBlueprint = new TestBlueprint('action2');
+    final Step step2 = Step('step2', 'action2');
+    final TestBlueprint actionBlueprint = TestBlueprint('action2');
 
-    final Step entry = new Step('step1', 'action1')
+    final Step entry = Step('step1', 'action1')
       ..defaultTransition = step2.key;
 
-    final Syllabus syllabus = new Syllabus([step2, entry], entry);
+    final Syllabus syllabus = Syllabus([step2, entry], entry);
 
-    final Roster roster = new Roster()..add(actionBlueprint);
+    final Roster roster = Roster()..add(actionBlueprint);
 
-    new Conductor(syllabus, roster).start();
+    Conductor(syllabus, roster).start();
     verify(actionBlueprint.action.launch());
   });
 }
diff --git a/lib/setui/common/test/step_test.dart b/lib/setui/common/test/step_test.dart
index 7fd1fad..2f21c6e 100644
--- a/lib/setui/common/test/step_test.dart
+++ b/lib/setui/common/test/step_test.dart
@@ -19,7 +19,7 @@
     const String action = 'start';
 
     // Create a parent node with two unique child actions.
-    final Step parent = new Step(name, action)
+    final Step parent = Step(name, action)
       ..addResult(result1, childKey1)
       ..addResult(result2, childKey2);
 
@@ -52,7 +52,7 @@
     const String result1 = 'result1';
 
     // Create parent with a single child node.
-    final Step parent = new Step('parent', 'start')
+    final Step parent = Step('parent', 'start')
       ..addResult(result1, childKey)
       ..defaultTransition = defaultKey;
 
diff --git a/lib/setui/common/test/syllabus_test.dart b/lib/setui/common/test/syllabus_test.dart
index 0a9b5f1..0ba8c55 100644
--- a/lib/setui/common/test/syllabus_test.dart
+++ b/lib/setui/common/test/syllabus_test.dart
@@ -10,13 +10,13 @@
   // Makes sure retrieveStep retrieves the [Step] by the given name or returns
   // null if it doesn't exist.
   test('test_step_retrieval', () {
-    final Step child3 = new Step('step3', 'action3');
-    final Step child2 = new Step('step2', 'action2')
+    final Step child3 = Step('step3', 'action3');
+    final Step child2 = Step('step2', 'action2')
       ..addResult('result', child3.key);
-    final Step child1 = new Step('step1', 'action1')
+    final Step child1 = Step('step1', 'action1')
       ..addResult('result', child2.key);
 
-    final Syllabus syllabus = new Syllabus([child3, child2, child1], child1);
+    final Syllabus syllabus = Syllabus([child3, child2, child1], child1);
 
     expect(syllabus.retrieveStep('step3'), child3);
     expect(syllabus.retrieveStep('unknownStep'), null);
diff --git a/lib/setui/flutter/lib/widget_blueprint.dart b/lib/setui/flutter/lib/widget_blueprint.dart
index 0eb4e87..3573130 100644
--- a/lib/setui/flutter/lib/widget_blueprint.dart
+++ b/lib/setui/flutter/lib/widget_blueprint.dart
@@ -24,6 +24,6 @@
 
   @override
   Action assemble(Step step, ActionResultReceiver receiver) {
-    return new WidgetAction(step, receiver, this);
+    return WidgetAction(step, receiver, this);
   }
 }
diff --git a/lib/setui/settings/common/lib/setting_adapter.dart b/lib/setui/settings/common/lib/setting_adapter.dart
index 23d5f35..e0f4c72 100644
--- a/lib/setui/settings/common/lib/setting_adapter.dart
+++ b/lib/setui/settings/common/lib/setting_adapter.dart
@@ -78,18 +78,18 @@
 
   const AdapterLogType._(this.value);
 
-  static const AdapterLogType fetch = const AdapterLogType._(fetchId);
+  static const AdapterLogType fetch = AdapterLogType._(fetchId);
 
-  static const AdapterLogType update = const AdapterLogType._(updateId);
+  static const AdapterLogType update = AdapterLogType._(updateId);
 
-  static const AdapterLogType setting = const AdapterLogType._(settingId);
+  static const AdapterLogType setting = AdapterLogType._(settingId);
 
-  static const AdapterLogType response = const AdapterLogType._(responseId);
+  static const AdapterLogType response = AdapterLogType._(responseId);
 
-  static const AdapterLogType mutation = const AdapterLogType._(mutationId);
+  static const AdapterLogType mutation = AdapterLogType._(mutationId);
 
   static const AdapterLogType mutationResponse =
-      const AdapterLogType._(mutationResponseId);
+      AdapterLogType._(mutationResponseId);
 
   int toJson() {
     return value;
diff --git a/lib/setui/settings/common/lib/setting_controller.dart b/lib/setui/settings/common/lib/setting_controller.dart
index 35f93eb..f8e6fcf 100644
--- a/lib/setui/settings/common/lib/setting_controller.dart
+++ b/lib/setui/settings/common/lib/setting_controller.dart
@@ -33,7 +33,7 @@
         return SettingType.connectivity;
     }
 
-    throw new Exception('Undefined setting type!');
+    throw Exception('Undefined setting type!');
   }
 
   Future<void> mutate(Mutation mutation, MutationHandles handles) async {
diff --git a/lib/setui/settings/common/lib/setting_source.dart b/lib/setui/settings/common/lib/setting_source.dart
index 3b39b4b..0aa1585 100644
--- a/lib/setui/settings/common/lib/setting_source.dart
+++ b/lib/setui/settings/common/lib/setting_source.dart
@@ -15,7 +15,7 @@
   T _value;
 
   final StreamController<T> _streamController =
-      new StreamController<T>.broadcast();
+      StreamController<T>.broadcast();
 
   StreamSubscription<T> addListener(void callback(T value)) =>
       _streamController.stream.listen(callback);
diff --git a/lib/setui/settings/service/lib/src/network_controller.dart b/lib/setui/settings/service/lib/src/network_controller.dart
index 777b7ac..335ee37 100644
--- a/lib/setui/settings/service/lib/src/network_controller.dart
+++ b/lib/setui/settings/service/lib/src/network_controller.dart
@@ -27,10 +27,10 @@
 
 /// STOPSHIP(brycelee): re-enable once Migration is complete
 // /// How often to poll the wlan for wifi information.
-// const Duration _statusPeriod = const Duration(seconds: 3);
+// const Duration _statusPeriod = Duration(seconds: 3);
 
 // /// How often to poll the wlan for available wifi networks.
-// const Duration _scanPeriod = const Duration(seconds: 40);
+// const Duration _scanPeriod = Duration(seconds: 40);
 
 // const int _scanTimeout = 25;
 
diff --git a/lib/shell/lib/models/overlay_drag_model.dart b/lib/shell/lib/models/overlay_drag_model.dart
index db6b299..2f02453 100644
--- a/lib/shell/lib/models/overlay_drag_model.dart
+++ b/lib/shell/lib/models/overlay_drag_model.dart
@@ -13,7 +13,7 @@
     show ScopedModel, Model, ScopedModelDescendant;
 
 const RK4SpringDescription _kSimulationDesc =
-    const RK4SpringDescription(tension: 450.0, friction: 50.0);
+    RK4SpringDescription(tension: 450.0, friction: 50.0);
 
 /// Tracks any ongoing vertical drag that effects the overlay.
 class OverlayDragModel extends TickingModel {
@@ -38,7 +38,7 @@
   /// Wraps [ModelFinder.of] for this [Model]. See [ModelFinder.of] for more
   /// details.
   static OverlayDragModel of(BuildContext context) =>
-      new ModelFinder<OverlayDragModel>().of(context);
+      ModelFinder<OverlayDragModel>().of(context);
 
   /// Called when a vertical drag starts.
   void start() {}
@@ -69,7 +69,7 @@
     }
 
     /// Spring offset to 0.0.  Set effectedModel to null when 0.0.
-    _resetSimulation = new RK4SpringSimulation(
+    _resetSimulation = RK4SpringSimulation(
       initValue: offset,
       desc: _kSimulationDesc,
     )..target = 0.0;
diff --git a/lib/shell/lib/models/overlay_position_model.dart b/lib/shell/lib/models/overlay_position_model.dart
index c0a7aa8..80e5c9e 100644
--- a/lib/shell/lib/models/overlay_position_model.dart
+++ b/lib/shell/lib/models/overlay_position_model.dart
@@ -16,7 +16,7 @@
     show ScopedModel, Model, ScopedModelDescendant;
 
 const RK4SpringDescription _kSimulationDesc =
-    const RK4SpringDescription(tension: 450.0, friction: 50.0);
+    RK4SpringDescription(tension: 450.0, friction: 50.0);
 
 /// Model controlling an overlay.
 class OverlayPositionModel extends TracingSpringModel {
@@ -44,7 +44,7 @@
             0.0: hideMetricId
           },
         ) {
-    _overlayDragModel = new OverlayDragModel(overlayPositionModel: this)
+    _overlayDragModel = OverlayDragModel(overlayPositionModel: this)
       ..addListener(notifyListeners);
   }
 
@@ -75,7 +75,7 @@
   void restartNoInteractionTimer() {
     _stopNoInteractionTimer();
     if (noInteractionTimeout != null) {
-      _noInteractionTimer = new Timer(noInteractionTimeout, () {
+      _noInteractionTimer = Timer(noInteractionTimeout, () {
         onNoInteraction?.call();
         hide();
       });
diff --git a/lib/story_shell/examples/example_manual_relationships/lib/grouping.dart b/lib/story_shell/examples/example_manual_relationships/lib/grouping.dart
index 205b183..5a48890 100644
--- a/lib/story_shell/examples/example_manual_relationships/lib/grouping.dart
+++ b/lib/story_shell/examples/example_manual_relationships/lib/grouping.dart
@@ -10,11 +10,11 @@
 
   @override
   Widget build(BuildContext context) {
-    return new Container(
-      color: const Color(0xFFFFFFFF),
-      margin: const EdgeInsets.all(10.0),
-      padding: const EdgeInsets.all(10.0),
-      child: new Column(
+    return Container(
+      color: Color(0xFFFFFFFF),
+      margin: EdgeInsets.all(10.0),
+      padding: EdgeInsets.all(10.0),
+      child: Column(
         mainAxisAlignment: MainAxisAlignment.center,
         children: children,
       ),
diff --git a/lib/story_shell/examples/example_manual_relationships/lib/launch_copresent_button.dart b/lib/story_shell/examples/example_manual_relationships/lib/launch_copresent_button.dart
index 2b89beb..356b734 100644
--- a/lib/story_shell/examples/example_manual_relationships/lib/launch_copresent_button.dart
+++ b/lib/story_shell/examples/example_manual_relationships/lib/launch_copresent_button.dart
@@ -17,7 +17,7 @@
 
   @override
   CopresentLauncherState createState() =>
-      new CopresentLauncherState(_moduleContext, _generateChildId);
+      CopresentLauncherState(_moduleContext, _generateChildId);
 }
 
 /// Copresent Launch State
@@ -37,13 +37,13 @@
       (math.pow(2, _copresentEmphasisExp) * 10.0).roundToDouble() / 10.0;
 
   @override
-  Widget build(BuildContext context) => new Container(
+  Widget build(BuildContext context) => Container(
         alignment: FractionalOffset.center,
-        constraints: const BoxConstraints(maxWidth: 200.0),
-        child: new Column(
+        constraints: BoxConstraints(maxWidth: 200.0),
+        child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: <Widget>[
-            new Slider(
+            Slider(
               min: -1.6,
               max: 1.6,
               value: _copresentEmphasisExp,
@@ -51,18 +51,18 @@
               onChanged: (double value) =>
                   setState(() => _copresentEmphasisExp = value),
             ),
-            new StartModuleButton(
+            StartModuleButton(
               _moduleContext,
-              new SurfaceRelation(
+              SurfaceRelation(
                 emphasis: _emphasis,
                 arrangement: SurfaceArrangement.copresent,
               ),
               'Copresent',
               _generateChildId,
             ),
-            new StartModuleButton(
+            StartModuleButton(
               _moduleContext,
-              new SurfaceRelation(
+              SurfaceRelation(
                 emphasis: _emphasis,
                 arrangement: SurfaceArrangement.copresent,
                 dependency: SurfaceDependency.dependent,
diff --git a/lib/story_shell/examples/example_manual_relationships/lib/main.dart b/lib/story_shell/examples/example_manual_relationships/lib/main.dart
index 0127e7f..82a8c17 100644
--- a/lib/story_shell/examples/example_manual_relationships/lib/main.dart
+++ b/lib/story_shell/examples/example_manual_relationships/lib/main.dart
@@ -18,11 +18,11 @@
 import 'launch_copresent_button.dart';
 import 'start_module_button.dart';
 
-final StartupContext _context = new StartupContext.fromStartupInfo();
+final StartupContext _context = StartupContext.fromStartupInfo();
 
 /// This is used for keeping the reference around.
-ModuleImpl _module = new ModuleImpl();
-ModuleContextProxy _moduleContext = new ModuleContextProxy();
+ModuleImpl _module = ModuleImpl();
+ModuleContextProxy _moduleContext = ModuleContextProxy();
 int _childId = 0;
 
 String _generateChildId() {
@@ -51,30 +51,30 @@
 
 /// Starts a predefined test container
 void startContainerInShell() {
-  IntentBuilder intentBuilder = new IntentBuilder.handler(
+  IntentBuilder intentBuilder = IntentBuilder.handler(
       'fuchsia-pkg://fuchsia.com/example_manual_relationships#meta/example_manual_relationships.cmx');
 
-  const List<double> leftRect = const <double>[0.0, 0.0, 0.5, 1.0];
-  const List<double> trRect = const <double>[0.5, 0.0, 0.5, 0.5];
-  const List<double> brRect = const <double>[0.5, 0.5, 0.5, 0.5];
-  LayoutEntry left = new LayoutEntry(
-      nodeName: 'left', rectangle: new Float32List.fromList(leftRect));
-  LayoutEntry tr = new LayoutEntry(
-      nodeName: 'top_right', rectangle: new Float32List.fromList(trRect));
-  LayoutEntry br = new LayoutEntry(
-      nodeName: 'bottom_right', rectangle: new Float32List.fromList(brRect));
+  const List<double> leftRect = <double>[0.0, 0.0, 0.5, 1.0];
+  const List<double> trRect = <double>[0.5, 0.0, 0.5, 0.5];
+  const List<double> brRect = <double>[0.5, 0.5, 0.5, 0.5];
+  LayoutEntry left = LayoutEntry(
+      nodeName: 'left', rectangle: Float32List.fromList(leftRect));
+  LayoutEntry tr = LayoutEntry(
+      nodeName: 'top_right', rectangle: Float32List.fromList(trRect));
+  LayoutEntry br = LayoutEntry(
+      nodeName: 'bottom_right', rectangle: Float32List.fromList(brRect));
   ContainerLayout main =
-      new ContainerLayout(surfaces: <LayoutEntry>[left, tr, br]);
+      ContainerLayout(surfaces: <LayoutEntry>[left, tr, br]);
   List<ContainerLayout> layouts = <ContainerLayout>[main];
-  ContainerRelationEntry rootLeft = const ContainerRelationEntry(
+  ContainerRelationEntry rootLeft = ContainerRelationEntry(
       nodeName: 'left',
       parentNodeName: 'test',
-      relationship: const SurfaceRelation());
-  ContainerRelationEntry rootTr = const ContainerRelationEntry(
+      relationship: SurfaceRelation());
+  ContainerRelationEntry rootTr = ContainerRelationEntry(
       nodeName: 'top_right',
       parentNodeName: 'test',
-      relationship: const SurfaceRelation());
-  ContainerRelationEntry rootBr = const ContainerRelationEntry(
+      relationship: SurfaceRelation());
+  ContainerRelationEntry rootBr = ContainerRelationEntry(
       nodeName: 'bottom_right',
       parentNodeName: 'test',
       relationship:
@@ -85,11 +85,11 @@
     rootBr
   ];
   ContainerNode leftNode =
-      new ContainerNode(nodeName: 'left', intent: intentBuilder.intent);
+      ContainerNode(nodeName: 'left', intent: intentBuilder.intent);
   ContainerNode trNode =
-      new ContainerNode(nodeName: 'top_right', intent: intentBuilder.intent);
+      ContainerNode(nodeName: 'top_right', intent: intentBuilder.intent);
   ContainerNode brNode =
-      new ContainerNode(nodeName: 'bottom_right', intent: intentBuilder.intent);
+      ContainerNode(nodeName: 'bottom_right', intent: intentBuilder.intent);
   List<ContainerNode> nodes = <ContainerNode>[leftNode, trNode, brNode];
 
   _moduleContext.startContainerInShell(
@@ -110,10 +110,10 @@
   @override
   Widget build(BuildContext context) {
     return const Padding(
-      padding: const EdgeInsets.all(16.0),
-      child: const RaisedButton(
-        child: const Center(
-          child: const Text('Launch Container'),
+      padding: EdgeInsets.all(16.0),
+      child: RaisedButton(
+        child: Center(
+          child: Text('Launch Container'),
         ),
         onPressed: (startContainerInShell),
       ),
@@ -130,33 +130,33 @@
 
   @override
   Widget build(BuildContext context) {
-    return new Row(
+    return Row(
       children: <Widget>[
-        new Text('${_controller.name} '),
-        new Expanded(
-          child: new Padding(
-            padding: const EdgeInsets.all(2.0),
-            child: new ButtonTheme(
-              padding: const EdgeInsets.all(1.0),
-              child: new RaisedButton(
-                child: const Text(
+        Text('${_controller.name} '),
+        Expanded(
+          child: Padding(
+            padding: EdgeInsets.all(2.0),
+            child: ButtonTheme(
+              padding: EdgeInsets.all(1.0),
+              child: RaisedButton(
+                child: Text(
                   'Focus',
-                  style: const TextStyle(fontSize: 10.0),
+                  style: TextStyle(fontSize: 10.0),
                 ),
                 onPressed: _controller.focus,
               ),
             ),
           ),
         ),
-        new Expanded(
-          child: new Padding(
-            padding: const EdgeInsets.all(2.0),
-            child: new ButtonTheme(
-              padding: const EdgeInsets.all(1.0),
-              child: new RaisedButton(
-                child: const Text(
+        Expanded(
+          child: Padding(
+            padding: EdgeInsets.all(2.0),
+            child: ButtonTheme(
+              padding: EdgeInsets.all(1.0),
+              child: RaisedButton(
+                child: Text(
                   'Dismiss',
-                  style: const TextStyle(fontSize: 10.0),
+                  style: TextStyle(fontSize: 10.0),
                 ),
                 onPressed: _controller.defocus,
               ),
@@ -172,21 +172,21 @@
 class MainWidget extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    DateTime now = new DateTime.now().toLocal();
-    return new Scaffold(
-      body: new Center(
-        child: new Container(
-          constraints: const BoxConstraints(maxWidth: 200.0),
-          child: new ListView(
+    DateTime now = DateTime.now().toLocal();
+    return Scaffold(
+      body: Center(
+        child: Container(
+          constraints: BoxConstraints(maxWidth: 200.0),
+          child: ListView(
             children: <Widget>[
-              new Grouping(
+              Grouping(
                 children: <Widget>[
-                  new Text(
+                  Text(
                       "Module ${now.minute}:${now.second.toString().padLeft(2, '0')}"),
-                  new Padding(
-                    padding: const EdgeInsets.all(8.0),
-                    child: new RaisedButton(
-                      child: const Text('Close'),
+                  Padding(
+                    padding: EdgeInsets.all(8.0),
+                    child: RaisedButton(
+                      child: Text('Close'),
                       onPressed: () {
                         // NOTE(mesch): There used to be code here that calls
                         // ModuleContext.Done(), but that method no longer
@@ -197,7 +197,7 @@
                   ),
                 ],
               ),
-              new Grouping(
+              Grouping(
                 children: <Widget>[
                   CopresentLauncher(_moduleContext, _generateChildId),
                   const Divider(),
@@ -228,7 +228,7 @@
 
 /// Module related Services: Lifecycle and ModuleContext
 class ModuleImpl implements Lifecycle {
-  final LifecycleBinding _lifecycleBinding = new LifecycleBinding();
+  final LifecycleBinding _lifecycleBinding = LifecycleBinding();
 
   ModuleImpl() {
     log.info('ModuleImpl::initialize call');
@@ -262,11 +262,11 @@
   );
 
   Color randomColor =
-      new Color(0xFF000000 + new math.Random().nextInt(0xFFFFFF));
+      Color(0xFF000000 + math.Random().nextInt(0xFFFFFF));
 
-  runApp(new MaterialApp(
+  runApp(MaterialApp(
     title: 'Manual Module',
-    home: new MainWidget(),
-    theme: new ThemeData(canvasColor: randomColor),
+    home: MainWidget(),
+    theme: ThemeData(canvasColor: randomColor),
   ));
 }
diff --git a/lib/story_shell/examples/example_manual_relationships/lib/start_module_button.dart b/lib/story_shell/examples/example_manual_relationships/lib/start_module_button.dart
index 89a315c..c0c67b7 100644
--- a/lib/story_shell/examples/example_manual_relationships/lib/start_module_button.dart
+++ b/lib/story_shell/examples/example_manual_relationships/lib/start_module_button.dart
@@ -26,11 +26,11 @@
 
   @override
   Widget build(BuildContext context) {
-    return new Padding(
-      padding: const EdgeInsets.all(16.0),
-      child: new RaisedButton(
-        child: new Center(
-          child: new Text(_display),
+    return Padding(
+      padding: EdgeInsets.all(16.0),
+      child: RaisedButton(
+        child: Center(
+          child: Text(_display),
         ),
         onPressed: () {
           print(
@@ -44,11 +44,11 @@
   /// Starts a new module and returns its controller
   ModuleController startChildModule(
       ModuleContext moduleContext, SurfaceRelation relation) {
-    ModuleControllerProxy moduleController = new ModuleControllerProxy();
+    ModuleControllerProxy moduleController = ModuleControllerProxy();
 
     String name = _generateChildId();
 
-    IntentBuilder intentBuilder = new IntentBuilder.handler(_kModuleUrl);
+    IntentBuilder intentBuilder = IntentBuilder.handler(_kModuleUrl);
     moduleContext.addModuleToStory(
         name,
         intentBuilder.intent,
diff --git a/lib/story_shell/examples/mondrian_test/lib/main.dart b/lib/story_shell/examples/mondrian_test/lib/main.dart
index f0633f8..f42480d 100644
--- a/lib/story_shell/examples/mondrian_test/lib/main.dart
+++ b/lib/story_shell/examples/mondrian_test/lib/main.dart
@@ -11,13 +11,13 @@
   setupLogger(name: 'mondrianTest');
 
   Color randomColor =
-      new Color(0xFF000000 + new math.Random().nextInt(0xFFFFFF));
+      Color(0xFF000000 + math.Random().nextInt(0xFFFFFF));
 
-  runApp(new MaterialApp(
+  runApp(MaterialApp(
     title: 'Mondrian Test',
-    home: new Container(
+    home: Container(
       color: randomColor,
     ),
-    theme: new ThemeData(canvasColor: randomColor),
+    theme: ThemeData(canvasColor: randomColor),
   ));
 }
diff --git a/lib/story_shell/examples/story_shell_test/test/key_listener_test.dart b/lib/story_shell/examples/story_shell_test/test/key_listener_test.dart
index 4edaa6a..a2460ec 100644
--- a/lib/story_shell/examples/story_shell_test/test/key_listener_test.dart
+++ b/lib/story_shell/examples/story_shell_test/test/key_listener_test.dart
@@ -96,7 +96,7 @@
       mockPresentation.triggerEvent();
       // give the call time to propagate
       Future sleep1() {
-        return new Future.delayed(const Duration(seconds: 1), () {});
+        return Future.delayed(const Duration(seconds: 1), () {});
       }
 
       await sleep1();
diff --git a/lib/story_shell/lib/key_listener.dart b/lib/story_shell/lib/key_listener.dart
index 185b3d6..5493a10 100644
--- a/lib/story_shell/lib/key_listener.dart
+++ b/lib/story_shell/lib/key_listener.dart
@@ -30,7 +30,7 @@
 
   /// Key event listener
   final KeyboardCaptureListenerHackBinding _keyEventListener =
-      new KeyboardCaptureListenerHackBinding();
+      KeyboardCaptureListenerHackBinding();
 
   /// Call to register a key event - callback pair. The pair will be added
   /// to a Map, multiple callbacks can be associated with the same key event.
diff --git a/lib/xi/client/lib/src/client.dart b/lib/xi/client/lib/src/client.dart
index c67597e..54ab0c2 100644
--- a/lib/xi/client/lib/src/client.dart
+++ b/lib/xi/client/lib/src/client.dart
@@ -58,7 +58,7 @@
   ///     process.stdout.listen(streamController.add);
   ///
   StreamController<List<int>> streamController =
-      new StreamController<List<int>>();
+      StreamController<List<int>>();
 
   /// [XiClient] constructor.
   XiClient() {
diff --git a/lib/xi/fuchsia_client/lib/client.dart b/lib/xi/fuchsia_client/lib/client.dart
index 04336c7..75321ab 100644
--- a/lib/xi/fuchsia_client/lib/client.dart
+++ b/lib/xi/fuchsia_client/lib/client.dart
@@ -19,7 +19,7 @@
 /// This should not be used on its own, but subclassed by some another type
 /// that will handle setting up the socket.
 class FuchsiaSocketClient extends XiClient {
-  final SocketReader _reader = new SocketReader();
+  final SocketReader _reader = SocketReader();
 
   @override
   Future<Null> init() async {}
@@ -27,13 +27,13 @@
   @override
   void send(String data) {
     final List<int> ints = utf8.encode('$data\n');
-    final Uint8List bytes = new Uint8List.fromList(ints);
+    final Uint8List bytes = Uint8List.fromList(ints);
     final ByteData buffer = bytes.buffer.asByteData();
 
     final WriteResult result = _reader.socket.write(buffer);
 
     if (result.status != ZX.OK) {
-      StateError error = new StateError('ERROR WRITING: $result');
+      StateError error = StateError('ERROR WRITING: $result');
       streamController
         ..addError(error)
         ..close();
@@ -48,7 +48,7 @@
     final ReadResult result = _reader.socket.read(1000);
 
     if (result.status != ZX.OK) {
-      StateError error = new StateError('Socket read error: ${result.status}');
+      StateError error = StateError('Socket read error: ${result.status}');
       streamController
         ..addError(error)
         ..close();
@@ -70,7 +70,7 @@
     // Note: _ledgerHandle is currently unused, but we're hoping to bring it back.
   }
   final _dirProxy = io.DirectoryProxy();
-  final service.JsonProxy _jsonProxy = new service.JsonProxy();
+  final service.JsonProxy _jsonProxy = service.JsonProxy();
 
   @override
   Future<Null> init() async {
@@ -78,7 +78,7 @@
       return;
     }
 
-    final LaunchInfo launchInfo = new LaunchInfo(
+    final LaunchInfo launchInfo = LaunchInfo(
         url: 'fuchsia-pkg://fuchsia.com/xi_core#meta/xi_core.cmx',
         directoryRequest: _dirProxy.ctrl.request().passChannel());
 
@@ -89,7 +89,7 @@
 
     Incoming(_dirProxy).connectToService(_jsonProxy);
 
-    final SocketPair pair = new SocketPair();
+    final SocketPair pair = SocketPair();
     await _jsonProxy.connectSocket(pair.first);
     _reader
       ..bind(pair.second)
@@ -101,7 +101,7 @@
   @override
   void send(String data) {
     if (initialized == false) {
-      throw new StateError('Must call .init() first.');
+      throw StateError('Must call .init() first.');
     }
     super.send(data);
   }
diff --git a/lib/xi/fuchsia_client/test/xi_fuchsia_client_test.dart b/lib/xi/fuchsia_client/test/xi_fuchsia_client_test.dart
index 741f00c..c376881 100644
--- a/lib/xi/fuchsia_client/test/xi_fuchsia_client_test.dart
+++ b/lib/xi/fuchsia_client/test/xi_fuchsia_client_test.dart
@@ -7,7 +7,7 @@
 
 void main() {
   test('XiFuchsiaClient constructor', () {
-    XiFuchsiaClient client = new XiFuchsiaClient(null);
+    XiFuchsiaClient client = XiFuchsiaClient(null);
     expect(client.initialized, equals(false));
   });
 }
diff --git a/lib/xi/widgets/lib/src/document.dart b/lib/xi/widgets/lib/src/document.dart
index 2de0f51..56b6cfa 100644
--- a/lib/xi/widgets/lib/src/document.dart
+++ b/lib/xi/widgets/lib/src/document.dart
@@ -16,16 +16,16 @@
 /// Stores and manages updates to the state for a Xi document, and provides
 /// access to the editing API to the [Editor], via the [XiViewProxy].
 class Document extends Stream<Document> implements XiViewHandler {
-  final LineCache lines = new LineCache(TextStyle(color: Colors.black));
+  final LineCache lines = LineCache(TextStyle(color: Colors.black));
 
-  final TextStyle _defaultStyle = const TextStyle(color: Colors.white);
+  final TextStyle _defaultStyle = TextStyle(color: Colors.white);
 
   /// A connection to xi-core.
   XiViewProxy _viewProxy;
 
   final StreamController<Document> _controller;
 
-  Document() : _controller = new StreamController.broadcast();
+  Document() : _controller = StreamController.broadcast();
 
   List<Completer<XiViewProxy>> _pending = [];
 
@@ -39,7 +39,7 @@
     if (_viewProxy != null) {
       return Future.value(_viewProxy);
     }
-    final completer = new Completer();
+    final completer = Completer();
     _pending.add(completer);
     return completer.future;
   }
@@ -56,13 +56,13 @@
     _notifyListeners();
   }
 
-  LineCol _scrollPos = new LineCol(line: 0, col: 0);
+  LineCol _scrollPos = LineCol(line: 0, col: 0);
   LineCol get scrollPos => _scrollPos;
 
   double _measureWidth(String s) {
-    TextSpan span = new TextSpan(text: s, style: _defaultStyle);
+    TextSpan span = TextSpan(text: s, style: _defaultStyle);
     TextPainter painter =
-        new TextPainter(text: span, textDirection: TextDirection.ltr)..layout();
+        TextPainter(text: span, textDirection: TextDirection.ltr)..layout();
     return painter.width;
   }
 
@@ -89,7 +89,7 @@
 
   @override
   void scrollTo(int line, int col) {
-    _scrollPos = new LineCol(line: line, col: col);
+    _scrollPos = LineCol(line: line, col: col);
     _notifyListeners();
   }
 
diff --git a/lib/xi/widgets/lib/src/editor.dart b/lib/xi/widgets/lib/src/editor.dart
index 78c0696..a0d879e 100644
--- a/lib/xi/widgets/lib/src/editor.dart
+++ b/lib/xi/widgets/lib/src/editor.dart
@@ -29,7 +29,7 @@
         super(key: key);
 
   @override
-  EditorState createState() => new EditorState();
+  EditorState createState() => EditorState();
 }
 
 /// A simple class representing a line and column location in the view.
@@ -52,22 +52,22 @@
 
 /// State for editor tab
 class EditorState extends State<Editor> {
-  final ScrollController _controller = new ScrollController();
+  final ScrollController _controller = ScrollController();
   // Height of lines (currently fixed, all lines have the same height)
   double _lineHeight;
 
   // location of last tap (used to expand selection on long press)
   LineCol _lastTapLocation;
 
-  final FocusNode _focusNode = new FocusNode();
+  final FocusNode _focusNode = FocusNode();
   TextStyle _defaultStyle;
 
   StreamSubscription<Document> _documentStream;
 
   /// Creates a new editor state.
   EditorState() {
-    Color color = const Color(0xFF000000);
-    _defaultStyle = new TextStyle(color: color);
+    Color color = Color(0xFF000000);
+    _defaultStyle = TextStyle(color: color);
     // TODO: make style configurable
     _lineHeight = _lineHeightForStyle(_defaultStyle);
   }
@@ -106,11 +106,11 @@
 
   double _lineHeightForStyle(TextStyle style) {
     ui.ParagraphBuilder builder =
-        new ui.ParagraphBuilder(new ui.ParagraphStyle())
+        ui.ParagraphBuilder(ui.ParagraphStyle())
           ..pushStyle(style.getTextStyle())
           ..addText(_zeroWidthSpace);
     ui.Paragraph layout = builder.build()
-      ..layout(new ui.ParagraphConstraints(width: double.infinity));
+      ..layout(ui.ParagraphConstraints(width: double.infinity));
     return layout.height;
   }
 
@@ -189,7 +189,7 @@
     } else if (codePoint == 10) {
       viewProxy.then((view) => view.insertNewline());
     } else {
-      String chars = new String.fromCharCode(codePoint);
+      String chars = String.fromCharCode(codePoint);
       viewProxy.then((view) => view.insert(chars));
     }
   }
@@ -237,7 +237,7 @@
     if (text != null) {
       col = _utf16ToUtf8Offset(text.text.text, text.getIndexForHorizontal(x));
     }
-    return new LineCol(line: line, col: col);
+    return LineCol(line: line, col: col);
   }
 
   void _handleTapDown(TapDownDetails details) {
@@ -281,10 +281,10 @@
     if (line == null) {
       viewProxy.then((view) => view.requestLines(ix, ix + 1));
     }
-    return new TextLine(
+    return TextLine(
       // TODO: the string '[invalid]' is debug painting, replace with actual UX.
       line?.text ??
-          new TextSpan(text: '[invalid]', style: widget.document.lines.style),
+          TextSpan(text: '[invalid]', style: widget.document.lines.style),
       line?.cursor,
       line?.styles,
       _lineHeight,
@@ -296,28 +296,28 @@
     FocusScope.of(context).reparentIfNeeded(_focusNode);
 
     final Widget lines = (widget.document == null)
-        ? new Container()
-        : new ListView.builder(
+        ? Container()
+        : ListView.builder(
             itemExtent: _lineHeight,
             itemCount: widget.document.lines.height,
             itemBuilder: _itemBuilder,
             controller: _controller,
           );
 
-    return new RawKeyboardListener(
+    return RawKeyboardListener(
       focusNode: _focusNode,
       onKey: _handleKey,
-      child: new GestureDetector(
+      child: GestureDetector(
         onTapDown: _handleTapDown,
         onLongPress: _handleLongPress,
         onHorizontalDragUpdate: _handleHorizontalDragUpdate,
         behavior: HitTestBehavior.opaque,
-        child: new NotificationListener<ScrollUpdateNotification>(
+        child: NotificationListener<ScrollUpdateNotification>(
           onNotification: (ScrollUpdateNotification update) {
             _sendScrollViewport();
             return true;
           },
-          child: new Container(
+          child: Container(
             color: Colors.white,
             constraints: BoxConstraints.expand(),
             child: widget.debugBackground ? _makeDebugBackground(lines) : lines,
@@ -351,13 +351,13 @@
 
 /// Creates a new widget with the editor overlayed on a watermarked background
 Widget _makeDebugBackground(Widget editor) {
-  return new Stack(children: <Widget>[
+  return Stack(children: <Widget>[
     Container(
-        constraints: new BoxConstraints.expand(),
-        child: new Center(
+        constraints: BoxConstraints.expand(),
+        child: Center(
             child: Transform.rotate(
           angle: -math.pi / 6.0,
-          child: new Text('xi editor',
+          child: Text('xi editor',
               style: TextStyle(
                   fontSize: 144.0,
                   color: Colors.pink[50],
diff --git a/lib/xi/widgets/lib/src/editor_host.dart b/lib/xi/widgets/lib/src/editor_host.dart
index bae868c..0fc46fc 100644
--- a/lib/xi/widgets/lib/src/editor_host.dart
+++ b/lib/xi/widgets/lib/src/editor_host.dart
@@ -26,12 +26,12 @@
         super(key: key);
 
   @override
-  State<EditorHost> createState() => new EditorHostState();
+  State<EditorHost> createState() => EditorHostState();
 }
 
 /// State for XiApp.
 class EditorHostState extends State<EditorHost> implements XiHandler {
-  final Document _document = new Document();
+  final Document _document = Document();
 
   EditorHostState();
 
@@ -61,15 +61,15 @@
   /// Uses a [MaterialApp] as the root of the Xi UI hierarchy.
   @override
   Widget build(BuildContext context) {
-    return new MaterialApp(
+    return MaterialApp(
       title: 'Xi',
-      home: new Material(
+      home: Material(
         // required for the debug background to render correctly
         type: MaterialType.transparency,
         child: Container(
-          constraints: new BoxConstraints.expand(),
+          constraints: BoxConstraints.expand(),
           color: Colors.white,
-          child: new Editor(
+          child: Editor(
               document: _document, debugBackground: widget.debugBackground),
         ),
       ),
diff --git a/lib/xi/widgets/lib/src/editor_tabs.dart b/lib/xi/widgets/lib/src/editor_tabs.dart
index 318907b..3aab424 100644
--- a/lib/xi/widgets/lib/src/editor_tabs.dart
+++ b/lib/xi/widgets/lib/src/editor_tabs.dart
@@ -22,7 +22,7 @@
         super(key: key, coreProxy: coreProxy, debugBackground: debugBackground);
 
   @override
-  State<EditorTabs> createState() => new EditorTabsState();
+  State<EditorTabs> createState() => EditorTabsState();
 }
 
 class EditorTabsState extends State<EditorTabs>
@@ -45,7 +45,7 @@
     super.initState();
     widget.coreProxy.handler = this;
     widget.coreProxy.clientStarted().then((_) => newView());
-    _tabController = new TabController(vsync: this, length: 0);
+    _tabController = TabController(vsync: this, length: 0);
   }
 
   void newView() {
@@ -54,10 +54,10 @@
         _viewIds.add(viewId);
         _fakeDocumentTitles[viewId] = 'Untitled $_nextDocumentTitleNumber';
         _nextDocumentTitleNumber += 1;
-        _documents.putIfAbsent(viewId, () => new Document());
+        _documents.putIfAbsent(viewId, () => Document());
         _documents[viewId].finalizeViewProxy(widget.coreProxy.view(viewId));
         int prevIndex = _tabController.index;
-        _tabController = new TabController(
+        _tabController = TabController(
             vsync: this, length: _viewIds.length, initialIndex: prevIndex)
           ..animateTo(_viewIds.length - 1);
       });
@@ -71,7 +71,7 @@
       _viewIds.remove(viewId);
       _documents.remove(viewId);
       int prevIndex = _tabController.index;
-      _tabController = new TabController(
+      _tabController = TabController(
           vsync: this,
           length: _viewIds.length,
           initialIndex: math.max(0, math.min(prevIndex, _viewIds.length - 1)));
@@ -84,7 +84,7 @@
     // can get called before `newView`'s future resolves. However this does mean
     // races are possible if this is called with a `viewId` of a closed view, in which case
     // we could have some zombie documents sitting around.
-    _documents.putIfAbsent(viewId, () => new Document());
+    _documents.putIfAbsent(viewId, () => Document());
     return _documents[viewId];
   }
 
@@ -106,16 +106,16 @@
   @override
   Widget build(BuildContext context) {
     List<Widget> actions = [
-      new IconButton(icon: Icon(Icons.add), onPressed: newView)
+      IconButton(icon: Icon(Icons.add), onPressed: newView)
     ];
     if (_viewIds.length > 1) {
-      actions.add(new IconButton(
+      actions.add(IconButton(
           icon: Icon(Icons.remove),
           onPressed: () => closeView(_viewIds[_tabController.index])));
     }
 
     return MaterialApp(
-      theme: new ThemeData(
+      theme: ThemeData(
         primaryColor: Colors.pink[300],
       ),
       home: Scaffold(
@@ -125,11 +125,11 @@
               ? TabBar(
                   indicatorColor: Colors.white,
                   indicatorWeight: 4.0,
-                  labelStyle: const TextStyle(fontSize: 16.0),
+                  labelStyle: TextStyle(fontSize: 16.0),
                   isScrollable: true,
                   controller: _tabController,
                   tabs: _viewIds
-                      .map((id) => new Tab(text: _fakeDocumentTitles[id]))
+                      .map((id) => Tab(text: _fakeDocumentTitles[id]))
                       .toList(),
                 )
               : null,
@@ -152,10 +152,10 @@
     }
 
     return TabBarView(
-      physics: const NeverScrollableScrollPhysics(),
+      physics: NeverScrollableScrollPhysics(),
       controller: _tabController,
       children: _viewIds.map((id) {
-        return new Editor(
+        return Editor(
           document: _documents[id],
           key: Key(id),
           debugBackground: widget.debugBackground,
diff --git a/lib/xi/widgets/lib/src/embedded_editor.dart b/lib/xi/widgets/lib/src/embedded_editor.dart
index a8f2916..88d21b1 100644
--- a/lib/xi/widgets/lib/src/embedded_editor.dart
+++ b/lib/xi/widgets/lib/src/embedded_editor.dart
@@ -24,12 +24,12 @@
   }) : super(key: key);
 
   @override
-  State<EmbeddedEditor> createState() => new EmbeddedEditorState();
+  State<EmbeddedEditor> createState() => EmbeddedEditorState();
 }
 
 class EmbeddedEditorState extends State<EmbeddedEditor>
     implements XiRpcHandler {
-  final Document _document = new Document();
+  final Document _document = Document();
 
   EmbeddedEditorState();
 
@@ -43,15 +43,15 @@
   /// Uses a [MaterialApp] as the root of the Xi UI hierarchy.
   @override
   Widget build(BuildContext context) {
-    return new MaterialApp(
+    return MaterialApp(
       title: 'Xi',
-      home: new Material(
+      home: Material(
         // required for the debug background to render correctly
         type: MaterialType.transparency,
         child: Container(
-          constraints: new BoxConstraints.expand(),
+          constraints: BoxConstraints.expand(),
           color: Colors.white,
-          child: new Editor(
+          child: Editor(
               document: _document, debugBackground: widget.debugBackground),
         ),
       ),
diff --git a/lib/xi/widgets/lib/src/line_cache.dart b/lib/xi/widgets/lib/src/line_cache.dart
index 64e4b7c..d207281 100644
--- a/lib/xi/widgets/lib/src/line_cache.dart
+++ b/lib/xi/widgets/lib/src/line_cache.dart
@@ -27,13 +27,13 @@
 
   /// Constructor, from json data (xi-core update protocol format)
   Line.fromJson(Map<String, dynamic> json, TextStyle style)
-      : text = new TextSpan(text: json['text'], style: style),
+      : text = TextSpan(text: json['text'], style: style),
         cursor = _transformCursor(json['text'], json) ?? <int>[],
         styles = _transformStyles(json['text'], json) ?? <int>[];
 
   /// Update cursor and styles for a line, retaining text, using json
   /// from the xi-core "update" op
-  Line updateFromJson(Map<String, dynamic> json) => new Line(
+  Line updateFromJson(Map<String, dynamic> json) => Line(
         text,
         _transformCursor(text.text, json) ?? cursor,
         _transformStyles(text.text, json) ?? styles,
@@ -44,8 +44,8 @@
   // responsibility?
   int getIndexForHorizontal(double horizontal) {
     TextPainter textPainter =
-        new TextPainter(text: text, textDirection: TextDirection.ltr)..layout();
-    Offset offset = new Offset(horizontal, 0.0);
+        TextPainter(text: text, textDirection: TextDirection.ltr)..layout();
+    Offset offset = Offset(horizontal, 0.0);
     TextPosition pos = textPainter.getPositionForOffset(offset);
     return pos.offset;
   }
@@ -77,7 +77,7 @@
       switch (op['op']) {
         case 'ins':
           for (Map<String, dynamic> line in op['lines']) {
-            newLines.add(new Line.fromJson(line, style));
+            newLines.add(Line.fromJson(line, style));
           }
           break;
         case 'invalidate':
diff --git a/lib/xi/widgets/lib/src/text_line.dart b/lib/xi/widgets/lib/src/text_line.dart
index f620404..2c5298d 100644
--- a/lib/xi/widgets/lib/src/text_line.dart
+++ b/lib/xi/widgets/lib/src/text_line.dart
@@ -52,7 +52,7 @@
 
   @override
   _RenderTextLine createRenderObject(BuildContext context) {
-    return new _RenderTextLine(text, cursor, styles, height);
+    return _RenderTextLine(text, cursor, styles, height);
   }
 
   @override
@@ -71,7 +71,7 @@
     List<int> styles,
     double height,
   )   : _textPainter =
-            new TextPainter(text: text, textDirection: TextDirection.ltr),
+            TextPainter(text: text, textDirection: TextDirection.ltr),
         _cursor = cursor,
         _styles = styles,
         _height = height;
@@ -154,8 +154,8 @@
       // TODO: if we stop building TextLine objects for cache misses, can't be null
       if (_cursor != null) {
         for (int ix in _cursor) {
-          Rect caretPrototype = new Rect.fromLTWH(0.0, 0.0, 1.0, _height);
-          TextPosition position = new TextPosition(offset: ix);
+          Rect caretPrototype = Rect.fromLTWH(0.0, 0.0, 1.0, _height);
+          TextPosition position = TextPosition(offset: ix);
           Offset caretOffset =
               _textPainter.getOffsetForCaret(position, caretPrototype);
           _cursorRects.add(caretPrototype.shift(caretOffset));
@@ -173,7 +173,7 @@
           int styleId = _styles[i + 2];
           if (styleId == 0) {
             TextSelection selection =
-                new TextSelection(baseOffset: start, extentOffset: end);
+                TextSelection(baseOffset: start, extentOffset: end);
             for (TextBox box in _textPainter.getBoxesForSelection(selection)) {
               _selectionRects.add(box.toRect());
             }
@@ -186,7 +186,7 @@
 
   @override
   void performLayout() {
-    size = constraints.constrain(new Size(_nominalWidth, _height));
+    size = constraints.constrain(Size(_nominalWidth, _height));
     // TODO: necessary?
     _textPainter.layout();
   }
@@ -194,11 +194,11 @@
   @override
   void paint(PaintingContext context, Offset offset) {
     //print('painting, offset = $offset');
-    Paint paint = new Paint();
+    Paint paint = Paint();
 
     _layoutIfNeeded();
-    Color cursorColor = const Color(0xFF000040);
-    Color selectionColor = const Color(0xFFB2D8FC);
+    Color cursorColor = Color(0xFF000040);
+    Color selectionColor = Color(0xFFB2D8FC);
     for (Rect selectionRect in _selectionRects) {
       paint.color = selectionColor;
       context.canvas.drawRect(selectionRect.shift(offset), paint);
diff --git a/public/dart-pkg/zircon/test/channel_test.dart b/public/dart-pkg/zircon/test/channel_test.dart
index b5139ce..de49157 100644
--- a/public/dart-pkg/zircon/test/channel_test.dart
+++ b/public/dart-pkg/zircon/test/channel_test.dart
@@ -12,7 +12,7 @@
 /// Helper method to turn a [String] into a [ByteData] containing the
 /// text of the string encoded as UTF-8.
 ByteData utf8Bytes(final String text) {
-  return new ByteData.view(new Uint8List.fromList(utf8.encode(text)).buffer);
+  return ByteData.view(Uint8List.fromList(utf8.encode(text)).buffer);
 }
 
 void main() {
@@ -28,9 +28,9 @@
     expect(pair.first.close(), equals(0));
     expect(pair.first.isValid, isFalse);
     expect(pair.second.isValid, isTrue);
-    expect(System.channelWrite(pair.first, new ByteData(1), <Handle>[]),
+    expect(System.channelWrite(pair.first, ByteData(1), <Handle>[]),
         equals(ZX.ERR_BAD_HANDLE));
-    expect(System.channelWrite(pair.second, new ByteData(1), <Handle>[]),
+    expect(System.channelWrite(pair.second, ByteData(1), <Handle>[]),
         equals(ZX.ERR_PEER_CLOSED));
   });
 
@@ -75,7 +75,7 @@
 
   test('async wait channel read', () async {
     final HandlePairResult pair = System.channelCreate();
-    final Completer<List<int>> completer = new Completer<List<int>>();
+    final Completer<List<int>> completer = Completer<List<int>>();
     pair.first.asyncWait(ZX.CHANNEL_READABLE, (int status, int pending) {
       completer.complete(<int>[status, pending]);
     });
@@ -92,7 +92,7 @@
 
   test('async wait channel closed', () async {
     final HandlePairResult pair = System.channelCreate();
-    final Completer<int> completer = new Completer<int>();
+    final Completer<int> completer = Completer<int>();
     pair.first.asyncWait(ZX.CHANNEL_PEER_CLOSED, (int status, int pending) {
       completer.complete(status);
     });
diff --git a/public/dart-pkg/zircon/test/eventpair_test.dart b/public/dart-pkg/zircon/test/eventpair_test.dart
index 1e026bb..5a90eae 100644
--- a/public/dart-pkg/zircon/test/eventpair_test.dart
+++ b/public/dart-pkg/zircon/test/eventpair_test.dart
@@ -38,7 +38,7 @@
 
     test('async wait peer closed', () async {
       final HandlePairResult pair = System.eventpairCreate();
-      final Completer<int> completer = new Completer<int>();
+      final Completer<int> completer = Completer<int>();
       pair.first.asyncWait(EventPair.PEER_CLOSED, (int status, int pending) {
         completer.complete(status);
       });
diff --git a/public/dart-pkg/zircon/test/socket_test.dart b/public/dart-pkg/zircon/test/socket_test.dart
index c99f781..bf7162e 100644
--- a/public/dart-pkg/zircon/test/socket_test.dart
+++ b/public/dart-pkg/zircon/test/socket_test.dart
@@ -12,7 +12,7 @@
 /// Helper method to turn a [String] into a [ByteData] containing the
 /// text of the string encoded as UTF-8.
 ByteData utf8Bytes(final String text) {
-  return new ByteData.view(new Uint8List.fromList(utf8.encode(text)).buffer);
+  return ByteData.view(Uint8List.fromList(utf8.encode(text)).buffer);
 }
 
 void main() {
@@ -32,10 +32,10 @@
     expect(pair.first.isValid, isFalse);
     expect(pair.second.isValid, isTrue);
     final WriteResult firstResult =
-        System.socketWrite(pair.first, new ByteData(1), 0);
+        System.socketWrite(pair.first, ByteData(1), 0);
     expect(firstResult.status, equals(ZX.ERR_BAD_HANDLE));
     final WriteResult secondResult =
-        System.socketWrite(pair.second, new ByteData(1), 0);
+        System.socketWrite(pair.second, ByteData(1), 0);
     expect(secondResult.status, equals(ZX.ERR_PEER_CLOSED));
   });
 
@@ -99,7 +99,7 @@
 
   test('async wait socket read', () async {
     final HandlePairResult pair = System.socketCreate();
-    final Completer<int> completer = new Completer<int>();
+    final Completer<int> completer = Completer<int>();
     pair.first.asyncWait(ZX.SOCKET_READABLE, (int status, int pending) {
       completer.complete(status);
     });
@@ -114,7 +114,7 @@
 
   test('async wait socket closed', () async {
     final HandlePairResult pair = System.socketCreate();
-    final Completer<int> completer = new Completer<int>();
+    final Completer<int> completer = Completer<int>();
     pair.first.asyncWait(ZX.SOCKET_PEER_CLOSED, (int status, int pending) {
       completer.complete(status);
     });
diff --git a/public/dart-pkg/zircon/test/vmo_test.dart b/public/dart-pkg/zircon/test/vmo_test.dart
index 5f1b41b..ab48ef4 100644
--- a/public/dart-pkg/zircon/test/vmo_test.dart
+++ b/public/dart-pkg/zircon/test/vmo_test.dart
@@ -13,13 +13,13 @@
   group('test vmo', () {
     test('fromFile', () {
       const String fuchsia = 'Fuchsia';
-      File f = new File('tmp/testdata')
+      File f = File('tmp/testdata')
         ..createSync()
         ..writeAsStringSync(fuchsia);
       String readFuchsia = f.readAsStringSync();
       expect(readFuchsia, equals(fuchsia));
 
-      SizedVmo fileVmo = new SizedVmo.fromFile('tmp/testdata');
+      SizedVmo fileVmo = SizedVmo.fromFile('tmp/testdata');
       Uint8List fileData = fileVmo.map();
       String fileString = utf8.decode(fileData.sublist(0, fileVmo.size));
       expect(fileString, equals(fuchsia));
@@ -27,8 +27,8 @@
 
     test('duplicate', () {
       const String fuchsia = 'Fuchsia';
-      Uint8List data = new Uint8List.fromList(fuchsia.codeUnits);
-      SizedVmo vmo = new SizedVmo.fromUint8List(data);
+      Uint8List data = Uint8List.fromList(fuchsia.codeUnits);
+      SizedVmo vmo = SizedVmo.fromUint8List(data);
       final Vmo duplicate =
           vmo.duplicate(ZX.RIGHTS_BASIC | ZX.RIGHT_READ | ZX.RIGHT_MAP);
       expect(duplicate.isValid, isTrue);
diff --git a/public/dart/composition_delegate/lib/src/composition_delegate/composition_delegate.dart b/public/dart/composition_delegate/lib/src/composition_delegate/composition_delegate.dart
index 02e198e..226bb31 100644
--- a/public/dart/composition_delegate/lib/src/composition_delegate/composition_delegate.dart
+++ b/public/dart/composition_delegate/lib/src/composition_delegate/composition_delegate.dart
@@ -34,13 +34,13 @@
 
   /// The default LayoutContext
   static const LayoutContext defaultContext =
-      const LayoutContext(size: const Size(1280, 800));
+      LayoutContext(size: Size(1280, 800));
 
   /// Constructor
   CompositionDelegate({
     this.layoutContext = defaultContext,
   })  : _hiddenSurfaces = <String>{},
-        _surfaceTree = new SurfaceTree();
+        _surfaceTree = SurfaceTree();
 
   /// Add a Surface to the tree. [parentId] is an optional paramater used when
   /// this surface has a parent-child relationship with a [Surface] that is
@@ -169,7 +169,7 @@
 
   List<Layer> _splitEvenly(
       List<Layer> layout, SurfaceTree spanningTree, int spanningTreeSize) {
-    Layer layer = new Layer();
+    Layer layer = Layer();
     int surfaceIndex = 0;
     double splitSize = layoutContext.size.width / spanningTreeSize;
     for (Surface surface in spanningTree) {
diff --git a/public/dart/composition_delegate/lib/src/internal/tree/_surface_node.dart b/public/dart/composition_delegate/lib/src/internal/tree/_surface_node.dart
index 4f204d2..6f50603 100644
--- a/public/dart/composition_delegate/lib/src/internal/tree/_surface_node.dart
+++ b/public/dart/composition_delegate/lib/src/internal/tree/_surface_node.dart
@@ -43,7 +43,7 @@
 
   /// Direct descendents of parent, except this
   Iterable<SurfaceNode> get siblings => (_parentNode == null)
-      ? new Iterable<SurfaceNode>.empty()
+      ? Iterable<SurfaceNode>.empty()
       : _parentNode.childNodes.where((SurfaceNode node) => node != this);
 
   /// Direct ancestors of this, starting at parent to root
diff --git a/public/dart/composition_delegate/lib/src/internal/tree/_surface_tree.dart b/public/dart/composition_delegate/lib/src/internal/tree/_surface_tree.dart
index 3b3a9c3..ff77b38 100644
--- a/public/dart/composition_delegate/lib/src/internal/tree/_surface_tree.dart
+++ b/public/dart/composition_delegate/lib/src/internal/tree/_surface_tree.dart
@@ -150,7 +150,7 @@
     } else {
       log.warning('node $startNodeId not found in tree, '
           'returning empty spanningTree');
-      return new SurfaceTree();
+      return SurfaceTree();
     }
     // find the topmost point of the connected tree where the relationship holds
     // (excluding the kRoot, which is not a valid Surface)
@@ -161,7 +161,7 @@
       startNode = startNode.parentNode;
     }
     // then return all the descendents who satisfy condition
-    SurfaceTree spanTree = new SurfaceTree()..add(surface: startNode.surface);
+    SurfaceTree spanTree = SurfaceTree()..add(surface: startNode.surface);
     __copyTreeWithConditional(
         current: startNode, tree: spanTree, condition: condition);
     return spanTree;
diff --git a/public/dart/composition_delegate/test/internal/surface_node_test.dart b/public/dart/composition_delegate/test/internal/surface_node_test.dart
index ede4072..b6e312f 100644
--- a/public/dart/composition_delegate/test/internal/surface_node_test.dart
+++ b/public/dart/composition_delegate/test/internal/surface_node_test.dart
@@ -39,18 +39,18 @@
     //  |  child  | |  sibling  |           |  cousin  |
     //  +---------+ +-----------+           +----------+
     //
-    uncle = new SurfaceNode(surface: new Surface(surfaceId: 'uncle'));
-    cousin = new SurfaceNode(surface: new Surface(surfaceId: 'cousin'));
-    sibling = new SurfaceNode(surface: new Surface(surfaceId: 'sibling'));
-    child = new SurfaceNode(surface: new Surface(surfaceId: 'child'));
+    uncle = SurfaceNode(surface: Surface(surfaceId: 'uncle'));
+    cousin = SurfaceNode(surface: Surface(surfaceId: 'cousin'));
+    sibling = SurfaceNode(surface: Surface(surfaceId: 'sibling'));
+    child = SurfaceNode(surface: Surface(surfaceId: 'child'));
 
-    aunt = new SurfaceNode(
-        surface: new Surface(surfaceId: 'aunt'), childNodes: [cousin]);
-    parent = new SurfaceNode(
-        surface: new Surface(surfaceId: 'parent'),
+    aunt = SurfaceNode(
+        surface: Surface(surfaceId: 'aunt'), childNodes: [cousin]);
+    parent = SurfaceNode(
+        surface: Surface(surfaceId: 'parent'),
         childNodes: [child, sibling]);
-    grandparent = new SurfaceNode(
-        surface: new Surface(surfaceId: 'grandparent'),
+    grandparent = SurfaceNode(
+        surface: Surface(surfaceId: 'grandparent'),
         childNodes: [parent, uncle, aunt]);
     detachedParent = <SurfaceNode>[grandparent, uncle, aunt, cousin];
 
diff --git a/public/dart/composition_delegate/test/internal/surface_tree_test.dart b/public/dart/composition_delegate/test/internal/surface_tree_test.dart
index dee43d6..498258b 100644
--- a/public/dart/composition_delegate/test/internal/surface_tree_test.dart
+++ b/public/dart/composition_delegate/test/internal/surface_tree_test.dart
@@ -22,19 +22,19 @@
 
   setUp(() {
     /// Set up a regular tree
-    tree = new SurfaceTree();
-    grandparent = new Surface(surfaceId: 'grandparent');
-    parent = new Surface(surfaceId: 'parent');
-    child = new Surface(surfaceId: 'child');
+    tree = SurfaceTree();
+    grandparent = Surface(surfaceId: 'grandparent');
+    parent = Surface(surfaceId: 'parent');
+    child = Surface(surfaceId: 'child');
 
     /// Set up a tree with relationships
-    depParent = new Surface(
+    depParent = Surface(
       surfaceId: parent.surfaceId,
     );
-    depChild = new Surface(
+    depChild = Surface(
       surfaceId: child.surfaceId,
     );
-    independent = new Surface(surfaceId: 'independent');
+    independent = Surface(surfaceId: 'independent');
     // make tree with dependency relationships:
     // gp <-dep- parent <-dep- child <-indep- independent
     depTree = SurfaceTree()
diff --git a/public/dart/composition_delegate/test/layout_test.dart b/public/dart/composition_delegate/test/layout_test.dart
index 78d4083..64d97b9 100644
--- a/public/dart/composition_delegate/test/layout_test.dart
+++ b/public/dart/composition_delegate/test/layout_test.dart
@@ -7,8 +7,8 @@
 
 void main() {
   CompositionDelegate setupCompositionDelegate() {
-    CompositionDelegate compDelegate = new CompositionDelegate(
-        layoutContext: new LayoutContext(size: Size(1280, 800)));
+    CompositionDelegate compDelegate = CompositionDelegate(
+        layoutContext: LayoutContext(size: Size(1280, 800)));
     return compDelegate;
   }
 
diff --git a/public/dart/fidl/lib/src/codec.dart b/public/dart/fidl/lib/src/codec.dart
index ce0d94d..1d60e90 100644
--- a/public/dart/fidl/lib/src/codec.dart
+++ b/public/dart/fidl/lib/src/codec.dart
@@ -21,7 +21,7 @@
 
 void _throwIfNegative(int value) {
   if (value < 0) {
-    throw new FidlError(
+    throw FidlError(
         'Cannot encode a negative value for an unsigned type: $value');
   }
 }
@@ -30,16 +30,16 @@
 
 class Encoder {
   Message get message {
-    final ByteData trimmed = new ByteData.view(data.buffer, 0, _extent);
-    return new Message(trimmed, _handles, _extent, _handles.length);
+    final ByteData trimmed = ByteData.view(data.buffer, 0, _extent);
+    return Message(trimmed, _handles, _extent, _handles.length);
   }
 
-  ByteData data = new ByteData(_kInitialBufferSize);
+  ByteData data = ByteData(_kInitialBufferSize);
   final List<Handle> _handles = <Handle>[];
   int _extent = 0;
 
   void _grow(int newSize) {
-    final Uint8List newList = new Uint8List(newSize)
+    final Uint8List newList = Uint8List(newSize)
       ..setRange(0, data.lengthInBytes, data.buffer.asUint8List());
     data = newList.buffer.asByteData();
   }
@@ -144,7 +144,7 @@
     final int result = _nextOffset;
     _nextOffset += _align(size);
     if (_nextOffset > _message.dataLength) {
-      throw new FidlError('Cannot access out of range memory');
+      throw FidlError('Cannot access out of range memory');
     }
     return result;
   }
@@ -155,7 +155,7 @@
 
   Handle claimHandle() {
     if (_nextHandle >= _message.handlesLength) {
-      throw new FidlError('Cannot access out of range handle');
+      throw FidlError('Cannot access out of range handle');
     }
     return _message.handles[_nextHandle++];
   }
diff --git a/public/dart/fidl/lib/src/interface.dart b/public/dart/fidl/lib/src/interface.dart
index 60c7e8e..5763994 100644
--- a/public/dart/fidl/lib/src/interface.dart
+++ b/public/dart/fidl/lib/src/interface.dart
@@ -146,9 +146,9 @@
 
 class InterfacePair<T> {
   InterfacePair() {
-    ChannelPair pair = new ChannelPair();
-    request = new InterfaceRequest<T>(pair.first);
-    handle = new InterfaceHandle<T>(pair.second);
+    ChannelPair pair = ChannelPair();
+    request = InterfaceRequest<T>(pair.first);
+    handle = InterfaceHandle<T>(pair.second);
   }
 
   InterfaceRequest<T> request;
@@ -198,7 +198,7 @@
   /// The `impl` parameter must not be null.
   InterfaceHandle<T> wrap(T impl) {
     assert(!isBound);
-    ChannelPair pair = new ChannelPair();
+    ChannelPair pair = ChannelPair();
     if (pair.status != ZX.OK) {
       return null;
     }
@@ -209,7 +209,7 @@
       onBind();
     }
 
-    return new InterfaceHandle<T>(pair.second);
+    return InterfaceHandle<T>(pair.second);
   }
 
   /// Binds the given implementation to the given interface request.
@@ -245,7 +245,7 @@
   InterfaceRequest<T> unbind() {
     assert(isBound);
     final InterfaceRequest<T> result =
-        new InterfaceRequest<T>(_reader.unbind());
+        InterfaceRequest<T>(_reader.unbind());
     _impl = null;
 
     if (onUnbind != null) {
@@ -293,10 +293,10 @@
   void _handleReadable() {
     final ReadResult result = _reader.channel.queryAndRead();
     if ((result.bytes == null) || (result.bytes.lengthInBytes == 0))
-      throw new FidlError('Unexpected empty message or error: $result '
+      throw FidlError('Unexpected empty message or error: $result '
           'from channel ${_reader.channel}');
 
-    final Message message = new Message.fromReadResult(result);
+    final Message message = Message.fromReadResult(result);
     handleMessage(message, sendMessage);
   }
 
@@ -320,7 +320,7 @@
     _reader.channel.write(response.data, response.handles);
   }
 
-  final ChannelReader _reader = new ChannelReader();
+  final ChannelReader _reader = ChannelReader();
 }
 
 /// The object that [ProxyController<T>.error] completes with when there is
@@ -398,7 +398,7 @@
   /// The proxy must not already have been bound.
   InterfaceRequest<T> request() {
     assert(!isBound);
-    ChannelPair pair = new ChannelPair();
+    ChannelPair pair = ChannelPair();
     assert(pair.status == ZX.OK);
     _reader.bind(pair.first);
 
@@ -407,7 +407,7 @@
       onBind();
     }
 
-    return new InterfaceRequest<T>(pair.second);
+    return InterfaceRequest<T>(pair.second);
   }
 
   /// Binds the proxy to the given interface handle.
@@ -448,7 +448,7 @@
     }
 
     // TODO(rosswang): Do we need to _reset() here?
-    return new InterfaceHandle<T>(_reader.unbind());
+    return InterfaceHandle<T>(_reader.unbind());
   }
 
   /// Whether this object is bound to a channel.
@@ -481,27 +481,27 @@
   /// Used by subclasses of [Proxy<T>] to receive responses to messages.
   MessageSink onResponse;
 
-  final ChannelReader _reader = new ChannelReader();
-  final HashMap<int, Function> _callbackMap = new HashMap<int, Function>();
+  final ChannelReader _reader = ChannelReader();
+  final HashMap<int, Function> _callbackMap = HashMap<int, Function>();
 
   /// A future that completes when an error is generated by the proxy.
   Future<ProxyError> get error => _errorCompleter.future;
-  Completer<ProxyError> _errorCompleter = new Completer<ProxyError>();
+  Completer<ProxyError> _errorCompleter = Completer<ProxyError>();
 
   /// A future that completes when the proxy is bound.
   Future<Null> get bound => _boundCompleter.future;
-  Completer<Null> _boundCompleter = new Completer<Null>();
+  Completer<Null> _boundCompleter = Completer<Null>();
 
   int _nextTxid = 1;
   int _pendingResponsesCount = 0;
 
   void _reset() {
     _callbackMap.clear();
-    _errorCompleter = new Completer<ProxyError>();
+    _errorCompleter = Completer<ProxyError>();
     if (!_boundCompleter.isCompleted) {
       _boundCompleter.completeError('Proxy<${$interfaceName}> closed.');
     }
-    _boundCompleter = new Completer<Null>();
+    _boundCompleter = Completer<Null>();
     _nextTxid = 1;
     _pendingResponsesCount = 0;
   }
@@ -515,7 +515,7 @@
     try {
       _pendingResponsesCount--;
       if (onResponse != null) {
-        onResponse(new Message.fromReadResult(result));
+        onResponse(Message.fromReadResult(result));
       }
     } on FidlError catch (e) {
       if (result.handles != null) {
@@ -601,9 +601,9 @@
     print(fullMessage);
     if (!_errorCompleter.isCompleted) {
       error.whenComplete(() {
-        _errorCompleter = new Completer<ProxyError>();
+        _errorCompleter = Completer<ProxyError>();
       });
-      _errorCompleter.complete(new ProxyError(fullMessage));
+      _errorCompleter.complete(ProxyError(fullMessage));
     }
   }
 }
diff --git a/public/dart/fidl/lib/src/interface_async.dart b/public/dart/fidl/lib/src/interface_async.dart
index 01900bf..f99ee6d 100644
--- a/public/dart/fidl/lib/src/interface_async.dart
+++ b/public/dart/fidl/lib/src/interface_async.dart
@@ -38,7 +38,7 @@
 
   /// The controller for the stream of state changes.
   final StreamController<InterfaceState> _streamController =
-      new StreamController.broadcast();
+      StreamController.broadcast();
 
   /// Gets the current state.
   InterfaceState get state => _currentState;
@@ -51,7 +51,7 @@
       return;
     }
     if (newState.index < _currentState.index) {
-      throw new FidlStateException(
+      throw FidlStateException(
           "Can't change InterfaceState from $_currentState to $newState.");
     }
     _currentState = newState;
@@ -73,10 +73,10 @@
       return stateChanges.firstWhere((s) => s == InterfaceState.bound);
     }
     if (_currentState == InterfaceState.bound) {
-      return new Future.value();
+      return Future.value();
     }
-    return new Future.error(
-        new FidlStateException('Interface will never become bound'));
+    return Future.error(
+        FidlStateException('Interface will never become bound'));
   }
 
   /// Is this interface closed?
@@ -85,7 +85,7 @@
   /// A future that completes when the interface is closed.
   Future<void> get whenClosed {
     if (_currentState == InterfaceState.closed) {
-      return new Future.value();
+      return Future.value();
     }
     return stateChanges.firstWhere((s) => s == InterfaceState.closed);
   }
@@ -118,12 +118,12 @@
   /// The `impl` parameter must not be null.
   InterfaceHandle<T> wrap(T impl) {
     if (!isUnbound) {
-      throw new FidlStateException(
+      throw FidlStateException(
           "AsyncBinding<${$interfaceName}> isn't unbound");
     }
-    ChannelPair pair = new ChannelPair();
+    ChannelPair pair = ChannelPair();
     if (pair.status != ZX.OK) {
-      throw new Exception(
+      throw Exception(
           "AsyncBinding<${$interfaceName}> couldn't create channel: ${getStringForStatus(pair.status)}");
     }
     _impl = impl;
@@ -131,7 +131,7 @@
 
     state = InterfaceState.bound;
 
-    return new InterfaceHandle<T>(pair.second);
+    return InterfaceHandle<T>(pair.second);
   }
 
   /// Binds the given implementation to the given interface request.
@@ -145,21 +145,21 @@
   /// `channel` property of the given `interfaceRequest` must not be `null`.
   void bind(T impl, InterfaceRequest<T> interfaceRequest) {
     if (!isUnbound) {
-      throw new FidlStateException(
+      throw FidlStateException(
           "AsyncBinding<${$interfaceName}> isn't unbound");
     }
     if (impl == null) {
-      throw new FidlError(
+      throw FidlError(
           "AsyncBinding<${$interfaceName}> can't bind to a null impl");
     }
     if (interfaceRequest == null) {
-      throw new FidlError(
+      throw FidlError(
           "AsyncBinding<${$interfaceName}> can't bind to a null InterfaceRequest");
     }
 
     Channel channel = interfaceRequest.passChannel();
     if (channel == null) {
-      throw new FidlError(
+      throw FidlError(
           "AsyncBinding<${$interfaceName}> can't bind to a null InterfaceRequest channel");
     }
 
@@ -178,11 +178,11 @@
   /// The object must have previously been bound (e.g., using [bind]).
   InterfaceRequest<T> unbind() {
     if (!isBound) {
-      throw new FidlStateException(
+      throw FidlStateException(
           "AsyncBinding<${$interfaceName}> isn't bound");
     }
     final InterfaceRequest<T> result =
-        new InterfaceRequest<T>(_reader.unbind());
+        InterfaceRequest<T>(_reader.unbind());
     _impl = null;
 
     state = InterfaceState.closed;
@@ -218,10 +218,10 @@
   void _handleReadable() {
     final ReadResult result = _reader.channel.queryAndRead();
     if ((result.bytes == null) || (result.bytes.lengthInBytes == 0))
-      throw new FidlError(
+      throw FidlError(
           'AsyncBinding<${$interfaceName}> Unexpected empty message or error: $result');
 
-    final Message message = new Message.fromReadResult(result);
+    final Message message = Message.fromReadResult(result);
     handleMessage(message, sendMessage);
   }
 
@@ -243,7 +243,7 @@
     _reader.channel.write(response.data, response.handles);
   }
 
-  final ChannelReader _reader = new ChannelReader();
+  final ChannelReader _reader = ChannelReader();
 }
 
 /// Representation of a service that all [T] implementations should extend from.
@@ -284,9 +284,9 @@
 
 /// A controller for Future based proxies.
 class AsyncProxyController<T> extends _Stateful {
-  final ChannelReader _reader = new ChannelReader();
+  final ChannelReader _reader = ChannelReader();
 
-  final HashMap<int, Completer<dynamic>> _completerMap = new HashMap();
+  final HashMap<int, Completer<dynamic>> _completerMap = HashMap();
   int _nextTxid = 1;
 
   /// Creates proxy controller.
@@ -301,7 +301,7 @@
     whenClosed.then((_) {
       for (final Completer completer in _completerMap.values) {
         if (!completer.isCompleted) {
-          completer.completeError(new FidlError(
+          completer.completeError(FidlError(
               'AsyncProxyController<${$interfaceName}> connection closed'));
         }
       }
@@ -335,19 +335,19 @@
   /// The proxy must not already have been bound.
   InterfaceRequest<T> request() {
     if (!isUnbound) {
-      throw new FidlStateException(
+      throw FidlStateException(
           "AsyncProxyController<${$interfaceName}> isn't unbound");
     }
 
-    ChannelPair pair = new ChannelPair();
+    ChannelPair pair = ChannelPair();
     if (pair.status != ZX.OK) {
-      throw new FidlError(
+      throw FidlError(
           "AsyncProxyController<${$interfaceName}> couldn't create channel: ${getStringForStatus(pair.status)}");
     }
     _reader.bind(pair.first);
     state = InterfaceState.bound;
 
-    return new InterfaceRequest<T>(pair.second);
+    return InterfaceRequest<T>(pair.second);
   }
 
   /// Binds the proxy to the given interface handle.
@@ -361,15 +361,15 @@
   /// of the given `interfaceHandle` must not be null.
   void bind(InterfaceHandle<T> interfaceHandle) {
     if (!isUnbound) {
-      throw new FidlStateException(
+      throw FidlStateException(
           "AsyncProxyController<${$interfaceName}> isn't unbound");
     }
     if (interfaceHandle == null) {
-      throw new FidlError(
+      throw FidlError(
           "AsyncProxyController<${$interfaceName}> can't bind to null InterfaceHandle");
     }
     if (interfaceHandle.channel == null) {
-      throw new FidlError(
+      throw FidlError(
           "AsyncProxyController<${$interfaceName}> can't bind to null InterfaceHandle channel");
     }
 
@@ -385,17 +385,17 @@
   /// The proxy must have previously been bound (e.g., using [bind]).
   InterfaceHandle<T> unbind() {
     if (!isBound) {
-      throw new FidlStateException(
+      throw FidlStateException(
           "AsyncProxyController<${$interfaceName}> isn't bound");
     }
     if (!_reader.isBound) {
-      throw new FidlError(
+      throw FidlError(
           "AsyncProxyController<${$interfaceName}> reader isn't bound");
     }
 
     state = InterfaceState.closed;
 
-    return new InterfaceHandle<T>(_reader.unbind());
+    return InterfaceHandle<T>(_reader.unbind());
   }
 
   /// Close the channel bound to the proxy.
@@ -406,7 +406,7 @@
       _reader.close();
       state = InterfaceState.closed;
       _completerMap.forEach((_, Completer<dynamic> completer) =>
-          completer.completeError(new FidlStateException(
+          completer.completeError(FidlStateException(
               'AsyncProxyController<${$interfaceName}> is closed.')));
     }
   }
@@ -425,13 +425,13 @@
   void _handleReadable() {
     final ReadResult result = _reader.channel.queryAndRead();
     if ((result.bytes == null) || (result.bytes.lengthInBytes == 0)) {
-      proxyError(new FidlError(
+      proxyError(FidlError(
           'AsyncProxyController<${$interfaceName}>: Read from channel failed'));
       return;
     }
     try {
       if (onResponse != null) {
-        onResponse(new Message.fromReadResult(result));
+        onResponse(Message.fromReadResult(result));
       }
     } on FidlError catch (e) {
       if (result.handles != null) {
@@ -445,7 +445,7 @@
 
   /// Always called when the channel underneath closes.
   void _handleError(ChannelReaderError error) {
-    proxyError(new FidlError(error.toString()));
+    proxyError(FidlError(error.toString()));
   }
 
   /// Sends the given messages over the bound channel.
@@ -453,13 +453,13 @@
   /// Used by subclasses of [Proxy<T>] to send encoded messages.
   void sendMessage(Message message) {
     if (!_reader.isBound) {
-      proxyError(new FidlStateException(
+      proxyError(FidlStateException(
           'AsyncProxyController<${$interfaceName}> is closed.'));
       return;
     }
     final int status = _reader.channel.write(message.data, message.handles);
     if (status != ZX.OK) {
-      proxyError(new FidlError(
+      proxyError(FidlError(
           'AsyncProxyController<${$interfaceName}> failed to write to channel: ${_reader.channel} (status: $status)'));
     }
   }
@@ -470,7 +470,7 @@
   /// Used by subclasses of [AsyncProxy<T>] to send encoded messages.
   void sendMessageWithResponse(Message message, Completer<dynamic> completer) {
     if (!_reader.isBound) {
-      proxyError(new FidlStateException(
+      proxyError(FidlStateException(
           'AsyncProxyController<${$interfaceName}> is closed.'));
       return;
     }
@@ -485,7 +485,7 @@
     final int status = _reader.channel.write(message.data, message.handles);
 
     if (status != ZX.OK) {
-      proxyError(new FidlError(
+      proxyError(FidlError(
           'AsyncProxyController<${$interfaceName}> failed to write to channel: ${_reader.channel} (status: $status)'));
       return;
     }
@@ -498,7 +498,7 @@
   Completer getCompleter(int txid) {
     final Completer result = _completerMap.remove(txid);
     if (result == null) {
-      proxyError(new FidlError('Message had unknown request id: $txid'));
+      proxyError(FidlError('Message had unknown request id: $txid'));
     }
     return result;
   }
diff --git a/public/dart/fidl/lib/src/message.dart b/public/dart/fidl/lib/src/message.dart
index 744c836..3190ec0 100644
--- a/public/dart/fidl/lib/src/message.dart
+++ b/public/dart/fidl/lib/src/message.dart
@@ -34,12 +34,12 @@
 
   void hexDump() {
     const int width = 16;
-    Uint8List list = new Uint8List.view(data.buffer, 0);
-    StringBuffer buffer = new StringBuffer();
-    final RegExp isPrintable = new RegExp(r'\w');
+    Uint8List list = Uint8List.view(data.buffer, 0);
+    StringBuffer buffer = StringBuffer();
+    final RegExp isPrintable = RegExp(r'\w');
     for (int i = 0; i < dataLength; i += width) {
-      StringBuffer hex = new StringBuffer();
-      StringBuffer printable = new StringBuffer();
+      StringBuffer hex = StringBuffer();
+      StringBuffer printable = StringBuffer();
       for (int j = 0; j < width && i + j < dataLength; j++) {
         int v = list[i + j];
         String s = v.toRadixString(16);
@@ -48,7 +48,7 @@
         else
           hex.write('$s ');
 
-        s = new String.fromCharCode(v);
+        s = String.fromCharCode(v);
         if (isPrintable.hasMatch(s)) {
           printable.write(s);
         } else {
diff --git a/public/dart/fidl/lib/src/types.dart b/public/dart/fidl/lib/src/types.dart
index 1a5313b..61b0679 100644
--- a/public/dart/fidl/lib/src/types.dart
+++ b/public/dart/fidl/lib/src/types.dart
@@ -21,27 +21,27 @@
 
 void _throwIfNotNullable(bool nullable) {
   if (!nullable) {
-    throw new FidlError('Found null for a non-nullable type');
+    throw FidlError('Found null for a non-nullable type');
   }
 }
 
 void _throwIfExceedsLimit(int count, int limit) {
   if (limit != null && count > limit) {
-    throw new FidlError(
+    throw FidlError(
         'Found an object wth $count elements. Limited to $limit.');
   }
 }
 
 void _throwIfCountMismatch(int count, int expectedCount) {
   if (count != expectedCount) {
-    throw new FidlError(
+    throw FidlError(
         'Found an array of count $count. Expected $expectedCount.');
   }
 }
 
 void _throwIfNotZero(int value) {
   if (value != 0) {
-    throw new FidlError('Expected zero, got: $value');
+    throw FidlError('Expected zero, got: $value');
   }
 }
 
@@ -145,7 +145,7 @@
   }
 
   List<T> decodeArray(Decoder decoder, int count, int offset) {
-    final List<T> list = new List<T>(count);
+    final List<T> list = List<T>(count);
     for (int i = 0; i < count; ++i) {
       list[i] = decode(decoder, offset + i * encodedSize);
     }
@@ -401,7 +401,7 @@
   } else if (encoded == kHandlePresent) {
     // Nothing to validate.
   } else {
-    throw new FidlError('Invalid handle encoding: $encoded.');
+    throw FidlError('Invalid handle encoding: $encoded.');
   }
 }
 
@@ -420,7 +420,7 @@
   _validateEncodedHandle(encoded, nullable);
   return encoded == kHandlePresent
       ? decoder.claimHandle()
-      : new Handle.invalid();
+      : Handle.invalid();
 }
 
 // TODO(pascallouis): By having _HandleWrapper exported, we could DRY this code
@@ -459,7 +459,7 @@
 
   @override
   Channel decode(Decoder decoder, int offset) =>
-      new Channel(_decodeHandle(decoder, offset, nullable));
+      Channel(_decodeHandle(decoder, offset, nullable));
 }
 
 class EventPairType extends NullableFidlType<EventPair> {
@@ -474,7 +474,7 @@
 
   @override
   EventPair decode(Decoder decoder, int offset) =>
-      new EventPair(_decodeHandle(decoder, offset, nullable));
+      EventPair(_decodeHandle(decoder, offset, nullable));
 }
 
 class SocketType extends NullableFidlType<Socket> {
@@ -489,7 +489,7 @@
 
   @override
   Socket decode(Decoder decoder, int offset) =>
-      new Socket(_decodeHandle(decoder, offset, nullable));
+      Socket(_decodeHandle(decoder, offset, nullable));
 }
 
 class VmoType extends NullableFidlType<Vmo> {
@@ -504,7 +504,7 @@
 
   @override
   Vmo decode(Decoder decoder, int offset) =>
-      new Vmo(_decodeHandle(decoder, offset, nullable));
+      Vmo(_decodeHandle(decoder, offset, nullable));
 }
 
 class InterfaceHandleType<T> extends NullableFidlType<InterfaceHandle<T>> {
@@ -520,7 +520,7 @@
   @override
   InterfaceHandle<T> decode(Decoder decoder, int offset) {
     final Handle handle = _decodeHandle(decoder, offset, nullable);
-    return new InterfaceHandle<T>(handle.isValid ? new Channel(handle) : null);
+    return InterfaceHandle<T>(handle.isValid ? Channel(handle) : null);
   }
 }
 
@@ -537,7 +537,7 @@
   @override
   InterfaceRequest<T> decode(Decoder decoder, int offset) {
     final Handle handle = _decodeHandle(decoder, offset, nullable);
-    return new InterfaceRequest<T>(handle.isValid ? new Channel(handle) : null);
+    return InterfaceRequest<T>(handle.isValid ? Channel(handle) : null);
   }
 }
 
@@ -560,7 +560,7 @@
         ..encodeUint64(kAllocAbsent, offset + 8); // data
       return null;
     }
-    final bytes = const Utf8Encoder().convert(value);
+    final bytes = Utf8Encoder().convert(value);
     final int size = bytes.length;
     encoder
       ..encodeUint64(size, offset) // size
@@ -601,7 +601,7 @@
     } else if (data == kAllocPresent) {
       _throwIfExceedsLimit(size, maybeElementCount);
     } else {
-      throw new FidlError('Invalid string encoding: $data.');
+      throw FidlError('Invalid string encoding: $data.');
     }
   }
 }
@@ -636,7 +636,7 @@
 
   void validateEncoded(int encoded) {
     if (encoded != kAllocAbsent && encoded != kAllocPresent) {
-      throw new FidlError('Invalid pointer encoding: $encoded.');
+      throw FidlError('Invalid pointer encoding: $encoded.');
     }
   }
 }
@@ -674,7 +674,7 @@
     final int count = members.length;
     final List<Object> values = value.$fields;
     if (values.length != count) {
-      throw new FidlError(
+      throw FidlError(
           'Unexpected number of members for $T. Expected $count. Got ${values.length}');
     }
     for (int i = 0; i < count; ++i) {
@@ -685,7 +685,7 @@
   @override
   T decode(Decoder decoder, int offset) {
     final int argc = members.length;
-    final List<Object> argv = new List<Object>(argc);
+    final List<Object> argv = List<Object>(argc);
     for (int i = 0; i < argc; ++i) {
       argv[i] = members[i].decode(decoder, offset);
     }
@@ -727,7 +727,7 @@
   switch (fieldPresent) {
     case kAllocPresent:
       if (mode == _envelopeMode.kMustBeAbsent)
-        throw new FidlError('expected empty envelope');
+        throw FidlError('expected empty envelope');
       final fieldKnown = fieldType != null;
       if (fieldKnown) {
         final fieldOffset = decoder.claimMemory(fieldType.encodedSize);
@@ -737,9 +737,9 @@
         final numHandlesConsumed =
             decoder.countClaimedHandles() - claimedHandles;
         if (numBytes != numBytesConsumed)
-          throw new FidlError('field was mis-sized');
+          throw FidlError('field was mis-sized');
         if (numHandles != numHandlesConsumed)
-          throw new FidlError('handles were mis-sized');
+          throw FidlError('handles were mis-sized');
         return field;
       } else if (mode == _envelopeMode.kAllowUnknown) {
         decoder.claimMemory(numBytes);
@@ -754,17 +754,17 @@
         }
         return null;
       } else {
-        throw new FidlError('unknown field');
+        throw FidlError('unknown field');
       }
       break;
     case kAllocAbsent:
       if (numBytes != 0)
-        throw new FidlError('absent envelope with non-zero bytes');
+        throw FidlError('absent envelope with non-zero bytes');
       if (numHandles != 0)
-        throw new FidlError('absent envelope with non-zero handles');
+        throw FidlError('absent envelope with non-zero handles');
       return null;
     default:
-      throw new FidlError('Bad reference encoding');
+      throw FidlError('Bad reference encoding');
   }
 }
 
@@ -784,7 +784,7 @@
     int maxOrdinal = 0;
     value.$fields.forEach((ordinal, field) {
       if (!members.containsKey(ordinal)) {
-        throw new FidlError(
+        throw FidlError(
             'Cannot encode unknown table member with ordinal: $ordinal');
       }
       if (field != null) {
@@ -830,9 +830,9 @@
       case kAllocPresent:
         break; // good
       case kAllocAbsent:
-        throw new FidlError('Unexpected null reference');
+        throw FidlError('Unexpected null reference');
       default:
-        throw new FidlError('Bad reference encoding');
+        throw FidlError('Bad reference encoding');
     }
 
     // Early exit on empty table.
@@ -872,7 +872,7 @@
   void encode(Encoder encoder, T value, int offset) {
     final int index = value.$index;
     if (index < 0 || index >= members.length)
-      throw new FidlError('Bad union tag index: $index');
+      throw FidlError('Bad union tag index: $index');
     encoder.encodeUint32(index, offset);
     members[index].encode(encoder, value.$data, offset);
   }
@@ -881,7 +881,7 @@
   T decode(Decoder decoder, int offset) {
     final int index = decoder.decodeUint32(offset);
     if (index < 0 || index >= members.length)
-      throw new FidlError('Bad union tag index: $index');
+      throw FidlError('Bad union tag index: $index');
     return ctor(index, members[index].decode(decoder, offset));
   }
 }
@@ -910,7 +910,7 @@
       final int ordinal = value.$ordinal;
       final FidlType fieldType = members[ordinal];
       if (fieldType == null)
-        throw new FidlError('Bad xunion ordinal: $ordinal');
+        throw FidlError('Bad xunion ordinal: $ordinal');
       encoder.encodeUint32(ordinal, offset);
       _encodeEnvelopePresent(encoder, envelopeOffset, value.$data, fieldType);
     }
@@ -922,7 +922,7 @@
     final int ordinal = decoder.decodeUint32(offset);
     if (ordinal == 0) {
       if (!nullable) {
-        throw new FidlError('Zero xunion ordinal on non-nullable');
+        throw FidlError('Zero xunion ordinal on non-nullable');
       }
       _decodeEnvelope(
         decoder, envelopeOffset, _envelopeMode.kMustBeAbsent, null);
@@ -930,11 +930,11 @@
     } else {
       final fieldType = members[ordinal];
       if (fieldType == null)
-        throw new FidlError('Bad xunion ordinal: $ordinal');
+        throw FidlError('Bad xunion ordinal: $ordinal');
       final field = _decodeEnvelope(
         decoder, envelopeOffset, _envelopeMode.kDisallowUnknown, fieldType);
       if (field == null)
-        throw new FidlError('Bad xunion: missing content');
+        throw FidlError('Bad xunion: missing content');
       return ctor(ordinal, field);
     }
   }
@@ -976,12 +976,12 @@
 
   @override
   void encode(Encoder encoder, Null value, int offset) {
-    throw new FidlError('Cannot encode a method.');
+    throw FidlError('Cannot encode a method.');
   }
 
   @override
   Null decode(Decoder decoder, int offset) {
-    throw new FidlError('Cannot decode a method.');
+    throw FidlError('Cannot decode a method.');
   }
 }
 
@@ -1039,7 +1039,7 @@
     } else if (data == kAllocPresent) {
       _throwIfExceedsLimit(count, maybeElementCount);
     } else {
-      throw new FidlError('Invalid vector encoding: $data.');
+      throw FidlError('Invalid vector encoding: $data.');
     }
   }
 }
diff --git a/public/dart/fuchsia/lib/src/fakes/fuchsia_fakes.dart b/public/dart/fuchsia/lib/src/fakes/fuchsia_fakes.dart
index 6551caf..a1e7c40 100644
--- a/public/dart/fuchsia/lib/src/fakes/fuchsia_fakes.dart
+++ b/public/dart/fuchsia/lib/src/fakes/fuchsia_fakes.dart
@@ -11,9 +11,9 @@
 // ignore_for_file: public_member_api_docs
 
 class MxStartupInfo {
-  static Handle takeEnvironment() => new Handle.invalid();
+  static Handle takeEnvironment() => Handle.invalid();
 
-  static Handle takeOutgoingServices() => new Handle.invalid();
+  static Handle takeOutgoingServices() => Handle.invalid();
 }
 
 void exit(int returnCode) {
diff --git a/public/dart/fuchsia_inspect/lib/src/vmo_fields.dart b/public/dart/fuchsia_inspect/lib/src/vmo_fields.dart
index 938796e..fcaddf5 100644
--- a/public/dart/fuchsia_inspect/lib/src/vmo_fields.dart
+++ b/public/dart/fuchsia_inspect/lib/src/vmo_fields.dart
@@ -77,46 +77,46 @@
   const BlockType._(this.value, this.name);
 
   /// Empty block, ready to be used.
-  static const BlockType free = const BlockType._(0, 'free');
+  static const BlockType free = BlockType._(0, 'free');
 
   /// In transition toward being used.
-  static const BlockType reserved = const BlockType._(1, 'reserved');
+  static const BlockType reserved = BlockType._(1, 'reserved');
 
   /// One block to rule them all. Index 0.
-  static const BlockType header = const BlockType._(2, 'header');
+  static const BlockType header = BlockType._(2, 'header');
 
   /// An entry in the Inspect tree, which may hold child Values: Nodes,
   /// Metrics, or Properties.
-  static const BlockType nodeValue = const BlockType._(3, 'nodeValue');
+  static const BlockType nodeValue = BlockType._(3, 'nodeValue');
 
   /// An int Metric.
-  static const BlockType intValue = const BlockType._(4, 'intValue');
+  static const BlockType intValue = BlockType._(4, 'intValue');
 
   /// A uint Metric.
-  static const BlockType uintValue = const BlockType._(5, 'uintValue');
+  static const BlockType uintValue = BlockType._(5, 'uintValue');
 
   /// A double Metric.
-  static const BlockType doubleValue = const BlockType._(6, 'doubleValue');
+  static const BlockType doubleValue = BlockType._(6, 'doubleValue');
 
   /// The header of a string or byte-vector Property.
-  static const BlockType propertyValue = const BlockType._(7, 'propertyValue');
+  static const BlockType propertyValue = BlockType._(7, 'propertyValue');
 
   /// The contents of a string Property (in a singly linked list, if necessary).
-  static const BlockType extent = const BlockType._(8, 'extent');
+  static const BlockType extent = BlockType._(8, 'extent');
 
   /// The name of a Value (Property, Metric, or Node) stored as utf8.
   ///
   /// Name must be contained in this one block. This may truncate utf8 strings
   /// in the middle of a multibyte character.
-  static const BlockType nameUtf8 = const BlockType._(9, 'nameUtf8');
+  static const BlockType nameUtf8 = BlockType._(9, 'nameUtf8');
 
   /// A property that's been deleted but still has live children.
-  static const BlockType tombstone = const BlockType._(10, 'tombstone');
+  static const BlockType tombstone = BlockType._(10, 'tombstone');
 
   /// *_VALUE type, for internal use.
   ///
   /// Not valid if written to VMO.
-  static const BlockType anyValue = const BlockType._(11, 'anyValue');
+  static const BlockType anyValue = BlockType._(11, 'anyValue');
 }
 
 /// Order defines the block size: 1 << (order + 4).
diff --git a/public/dart/fuchsia_inspect/lib/src/vmo_holder.dart b/public/dart/fuchsia_inspect/lib/src/vmo_holder.dart
index 1e54c81..a1747db 100644
--- a/public/dart/fuchsia_inspect/lib/src/vmo_holder.dart
+++ b/public/dart/fuchsia_inspect/lib/src/vmo_holder.dart
@@ -15,7 +15,7 @@
   VmoHolder(this.size) {
     HandleResult result = System.vmoCreate(size);
     if (result.status != ZX.OK) {
-      throw new ZxStatusException(
+      throw ZxStatusException(
           result.status, getStringForStatus(result.status));
     }
     _vmo = Vmo(result.handle);
@@ -36,7 +36,7 @@
   void write(int offset, ByteData data) {
     int status = _vmo.write(data, offset);
     if (status != ZX.OK) {
-      throw new ZxStatusException(status, getStringForStatus(status));
+      throw ZxStatusException(status, getStringForStatus(status));
     }
   }
 
@@ -44,7 +44,7 @@
   ByteData read(int offset, int size) {
     ReadResult result = _vmo.read(size, offset);
     if (result.status != ZX.OK) {
-      throw new ZxStatusException(
+      throw ZxStatusException(
           result.status, getStringForStatus(result.status));
     }
     return result.bytes;
diff --git a/public/dart/fuchsia_inspect/test/util.dart b/public/dart/fuchsia_inspect/test/util.dart
index 9a98af3..a6759ae 100644
--- a/public/dart/fuchsia_inspect/test/util.dart
+++ b/public/dart/fuchsia_inspect/test/util.dart
@@ -196,7 +196,7 @@
       return false;
     }
 
-    var listEquals = const ListEquality().equals;
+    var listEquals = ListEquality().equals;
 
     ByteData byteData = item;
     return listEquals(
diff --git a/public/dart/fuchsia_logger/lib/src/internal/_log_message.dart b/public/dart/fuchsia_logger/lib/src/internal/_log_message.dart
index 43600d7..92238f3 100644
--- a/public/dart/fuchsia_logger/lib/src/internal/_log_message.dart
+++ b/public/dart/fuchsia_logger/lib/src/internal/_log_message.dart
@@ -46,7 +46,7 @@
   /// The time that this message was created
   final int systemTime = Platform.isFuchsia
       ? System.clockGet(_zxClockMonotonic)
-      : new DateTime.now().microsecondsSinceEpoch * 1000;
+      : DateTime.now().microsecondsSinceEpoch * 1000;
 
   /// The default constructor
   LogMessage({
diff --git a/public/dart/fuchsia_logger/lib/src/internal/_log_writer.dart b/public/dart/fuchsia_logger/lib/src/internal/_log_writer.dart
index 5512599..2deab8f 100644
--- a/public/dart/fuchsia_logger/lib/src/internal/_log_writer.dart
+++ b/public/dart/fuchsia_logger/lib/src/internal/_log_writer.dart
@@ -20,7 +20,7 @@
 /// The base class for which log writers will inherit from. This class is
 /// used to pipe logs from the onRecord stream
 abstract class LogWriter {
-  List<String> _globalTags = const [];
+  List<String> _globalTags = [];
 
   StreamController<LogMessage> _controller;
 
diff --git a/public/dart/fuchsia_logger/test/internal/log_message_test.dart b/public/dart/fuchsia_logger/test/internal/log_message_test.dart
index ad18571..627afb9 100644
--- a/public/dart/fuchsia_logger/test/internal/log_message_test.dart
+++ b/public/dart/fuchsia_logger/test/internal/log_message_test.dart
@@ -138,7 +138,7 @@
 
 /// Convert from little endian format bytes to an unsiged 32 bit int.
 int _bytesToInt32(List<int> bytes) {
-  ByteData byteData = new ByteData(4);
+  ByteData byteData = ByteData(4);
   for (int i = 0; i < 4; i++) {
     byteData.setInt8(i, bytes[i]);
   }
@@ -147,7 +147,7 @@
 
 /// Convert from little endian format bytes to an unsiged 64 bit int.
 int _bytesToUint64(List<int> bytes) {
-  ByteData byteData = new ByteData(8);
+  ByteData byteData = ByteData(8);
   for (int i = 0; i < 8; i++) {
     byteData.setInt8(i, bytes[i]);
   }
@@ -176,7 +176,7 @@
   // Log time should be within the last 30 seconds
   int nowNanos = Platform.isFuchsia
       ? System.clockGet(_zxClockMonotonic)
-      : new DateTime.now().microsecondsSinceEpoch * 1000;
+      : DateTime.now().microsecondsSinceEpoch * 1000;
   int logNanos = _bytesToUint64(data.sublist(16, 24));
 
   expect(logNanos, lessThanOrEqualTo(nowNanos));
diff --git a/public/dart/fuchsia_modular/examples/multilevel_mod/lib/src/handlers/root_intent_handler.dart b/public/dart/fuchsia_modular/examples/multilevel_mod/lib/src/handlers/root_intent_handler.dart
index 4297cb0..7a044d6 100644
--- a/public/dart/fuchsia_modular/examples/multilevel_mod/lib/src/handlers/root_intent_handler.dart
+++ b/public/dart/fuchsia_modular/examples/multilevel_mod/lib/src/handlers/root_intent_handler.dart
@@ -5,7 +5,7 @@
 import 'package:flutter/material.dart';
 import 'package:fuchsia_modular/module.dart';
 
-const List<Color> _colors = const <Color>[
+const List<Color> _colors = <Color>[
   Colors.red,
   Colors.orange,
   Colors.yellow,
@@ -29,7 +29,7 @@
           backgroundColor: Colors.black54,
           body: Center(
             child: Stack(
-                alignment: const Alignment(0.0, 0.0),
+                alignment: Alignment(0.0, 0.0),
                 children: _createLayers(_numTotalLayers)),
           ),
         ),
diff --git a/public/dart/fuchsia_modular/examples/slider_mod/lib/src/widgets/value_slider.dart b/public/dart/fuchsia_modular/examples/slider_mod/lib/src/widgets/value_slider.dart
index 744c337..c2470ab 100644
--- a/public/dart/fuchsia_modular/examples/slider_mod/lib/src/widgets/value_slider.dart
+++ b/public/dart/fuchsia_modular/examples/slider_mod/lib/src/widgets/value_slider.dart
@@ -33,7 +33,7 @@
                   ),
                   Container(
                     alignment: Alignment.center,
-                    child: new Text('Value: ${snapshot.data.toInt()}',
+                    child: Text('Value: ${snapshot.data.toInt()}',
                         style: Theme.of(context).textTheme.display1),
                   ),
                 ],
@@ -64,7 +64,7 @@
           } else {
             return Container(
               alignment: Alignment.center,
-              child: new Text('Result: ${snapshot.data}',
+              child: Text('Result: ${snapshot.data}',
                   style: Theme.of(context).textTheme.display1),
               key: Key('fib-result-widget-key'),
             );
diff --git a/public/dart/fuchsia_modular/lib/src/module/internal/_module_impl.dart b/public/dart/fuchsia_modular/lib/src/module/internal/_module_impl.dart
index 7ff78a6..9c0ddf1 100644
--- a/public/dart/fuchsia_modular/lib/src/module/internal/_module_impl.dart
+++ b/public/dart/fuchsia_modular/lib/src/module/internal/_module_impl.dart
@@ -139,7 +139,7 @@
     }
 
     final moduleController = modular.ModuleControllerProxy();
-    final viewOwner = new InterfacePair<deprecated.ViewOwner>();
+    final viewOwner = InterfacePair<deprecated.ViewOwner>();
     final status = await _getContext().embedModule(
         name, intent, moduleController.ctrl.request(), viewOwner.passRequest());
 
diff --git a/public/dart/fuchsia_modular/lib/src/module/internal/_ongoing_activity_impl.dart b/public/dart/fuchsia_modular/lib/src/module/internal/_ongoing_activity_impl.dart
index de34803..a282724 100644
--- a/public/dart/fuchsia_modular/lib/src/module/internal/_ongoing_activity_impl.dart
+++ b/public/dart/fuchsia_modular/lib/src/module/internal/_ongoing_activity_impl.dart
@@ -27,7 +27,7 @@
       throw Exception(
           'It is an error to call OngoingActivity.done more than once. '
           'An ongoing activity can only be used one time. If you need to start '
-          'a new activity use the methods on Module to do so.');
+          'a activity use the methods on Module to do so.');
     }
 
     _hasCalledDone = true;
diff --git a/public/dart/fuchsia_modular/lib/src/module/module.dart b/public/dart/fuchsia_modular/lib/src/module/module.dart
index 7dda862..2966958 100644
--- a/public/dart/fuchsia_modular/lib/src/module/module.dart
+++ b/public/dart/fuchsia_modular/lib/src/module/module.dart
@@ -41,7 +41,7 @@
   /// a default relation is used. Note, [surfaceRelation] is an optional
   /// parameter so a default value will be provided:
   /// ```
-  /// modular.SurfaceRelation surfaceRelation = const modular.SurfaceRelation(
+  /// modular.SurfaceRelation surfaceRelation = modular.SurfaceRelation(
   ///    arrangement: modular.SurfaceArrangement.copresent,
   ///    dependency: modular.SurfaceDependency.dependent,
   ///    emphasis: 0.5,
diff --git a/public/dart/fuchsia_modular/test/matchers.dart b/public/dart/fuchsia_modular/test/matchers.dart
index 5bb7e39..f518df9 100644
--- a/public/dart/fuchsia_modular/test/matchers.dart
+++ b/public/dart/fuchsia_modular/test/matchers.dart
@@ -8,7 +8,7 @@
 
 /// A matcher which matches on the ModuleStateException type.
 const Matcher isModuleStateException =
-    const TypeMatcher<ModuleStateException>();
+    TypeMatcher<ModuleStateException>();
 
 /// A matcher which matches on the module ModuleStateException type.
 Matcher throwsModuleStateException = throwsA(isModuleStateException);
diff --git a/public/dart/fuchsia_modular/test/module/internal/fidl_transformers_test.dart b/public/dart/fuchsia_modular/test/module/internal/fidl_transformers_test.dart
index acc0f48..3b1a101 100644
--- a/public/dart/fuchsia_modular/test/module/internal/fidl_transformers_test.dart
+++ b/public/dart/fuchsia_modular/test/module/internal/fidl_transformers_test.dart
@@ -37,7 +37,7 @@
     test('Intents with const parameter lists can still be modified', () {
       final fidlIntent = fidl.Intent(
         action: 'action',
-        parameters: const [],
+        parameters: [],
       );
       // Should be able to modify the parameters on the intent.
       // note: there are helper methods for this task but we want to
diff --git a/public/dart/fuchsia_scenic_flutter/lib/src/child_view_connection.dart b/public/dart/fuchsia_scenic_flutter/lib/src/child_view_connection.dart
index 6ac24dc..894acec 100644
--- a/public/dart/fuchsia_scenic_flutter/lib/src/child_view_connection.dart
+++ b/public/dart/fuchsia_scenic_flutter/lib/src/child_view_connection.dart
@@ -159,11 +159,11 @@
     assert(!_available);
     assert(_sceneHost == null);
 
-    final EventPairPair sceneTokens = new EventPairPair();
+    final EventPairPair sceneTokens = EventPairPair();
     assert(sceneTokens.status == ZX.OK);
 
     // Analyzer doesn't know Handle must be dart:zircon's Handle
-    _sceneHost = new SceneHost(sceneTokens.first.passHandle());
+    _sceneHost = SceneHost(sceneTokens.first.passHandle());
     _viewKey = shared.nextGlobalViewKey();
     shared.globalViewContainer
         .addChild2(_viewKey, _viewHolderToken.value, sceneTokens.second);
@@ -229,7 +229,7 @@
     assert(_sceneHost != null);
     assert(ViewContainerListenerImpl.instance.getConnectionForKey(_viewKey) ==
         this);
-    final EventPairPair viewTokens = new EventPairPair();
+    final EventPairPair viewTokens = EventPairPair();
     assert(viewTokens.status == ZX.OK);
     ViewContainerListenerImpl.instance.removeConnectionForKey(_viewKey);
     _viewHolderToken = ViewHolderToken(value: viewTokens.first);
@@ -397,7 +397,7 @@
     assert(() {
       if (shared.globalViewContainer == null) {
         context.canvas
-            .drawRect(offset & size, Paint()..color = const Color(0xFF0000FF));
+            .drawRect(offset & size, Paint()..color = Color(0xFF0000FF));
         _debugErrorMessage.paint(context.canvas, offset);
       }
       return true;
@@ -430,7 +430,7 @@
     assert(() {
       if (shared.globalViewContainer == null) {
         _debugErrorMessage ??= TextPainter(
-            text: const TextSpan(
+            text: TextSpan(
                 text:
                     'Child views are supported only when running in Scenic.'));
         _debugErrorMessage.layout(minWidth: size.width, maxWidth: size.width);
diff --git a/public/dart/fuchsia_scenic_flutter/lib/src/internal/fakes/mozart_fakes.dart b/public/dart/fuchsia_scenic_flutter/lib/src/internal/fakes/mozart_fakes.dart
index 47a3f3d..a6a1c50 100644
--- a/public/dart/fuchsia_scenic_flutter/lib/src/internal/fakes/mozart_fakes.dart
+++ b/public/dart/fuchsia_scenic_flutter/lib/src/internal/fakes/mozart_fakes.dart
@@ -16,7 +16,7 @@
 
 class Scenic {
   static void offerServiceProvider(Handle handle, List<String> services) {
-    throw new UnimplementedError(
+    throw UnimplementedError(
         'offerServiceProvider is not implemented on this platform.');
   }
 }
diff --git a/public/dart/fuchsia_scenic_flutter/lib/src/view_container.dart b/public/dart/fuchsia_scenic_flutter/lib/src/view_container.dart
index 63d815a..1c7b47f 100644
--- a/public/dart/fuchsia_scenic_flutter/lib/src/view_container.dart
+++ b/public/dart/fuchsia_scenic_flutter/lib/src/view_container.dart
@@ -17,8 +17,8 @@
   if (handle == null) {
     return null;
   }
-  final ViewContainerProxy proxy = new ViewContainerProxy()
-    ..ctrl.bind(new InterfaceHandle<ViewContainer>(new Channel(handle)))
+  final ViewContainerProxy proxy = ViewContainerProxy()
+    ..ctrl.bind(InterfaceHandle<ViewContainer>(Channel(handle)))
     ..setListener(ViewContainerListenerImpl.instance.createInterfaceHandle());
 
   assert(() {
diff --git a/public/dart/fuchsia_scenic_flutter/lib/src/view_container_listener_impl.dart b/public/dart/fuchsia_scenic_flutter/lib/src/view_container_listener_impl.dart
index 0a93be1..c2d4d01 100644
--- a/public/dart/fuchsia_scenic_flutter/lib/src/view_container_listener_impl.dart
+++ b/public/dart/fuchsia_scenic_flutter/lib/src/view_container_listener_impl.dart
@@ -21,7 +21,7 @@
 class ViewContainerListenerImpl extends ViewContainerListener {
   /// The shared [ViewContainerListenerImpl] instance.
   static final ViewContainerListenerImpl instance =
-      new ViewContainerListenerImpl._();
+      ViewContainerListenerImpl._();
 
   ViewContainerListenerImpl._() : super();
 
diff --git a/public/dart/fuchsia_vfs/lib/src/pseudo_file.dart b/public/dart/fuchsia_vfs/lib/src/pseudo_file.dart
index 710d0d8..5c13b45 100644
--- a/public/dart/fuchsia_vfs/lib/src/pseudo_file.dart
+++ b/public/dart/fuchsia_vfs/lib/src/pseudo_file.dart
@@ -205,7 +205,7 @@
 ///
 /// This class should not be used directly, but by [fuchsia_vfs.PseudoFile].
 class _FileConnection extends File {
-  final FileBinding _binding = new FileBinding();
+  final FileBinding _binding = FileBinding();
 
   /// open file connection flags
   final int flags;
diff --git a/public/dart/fuchsia_vfs/lib/src/vmo_file.dart b/public/dart/fuchsia_vfs/lib/src/vmo_file.dart
index 018189e..b9aaadc 100644
--- a/public/dart/fuchsia_vfs/lib/src/vmo_file.dart
+++ b/public/dart/fuchsia_vfs/lib/src/vmo_file.dart
@@ -54,7 +54,7 @@
         return null;
       }
 
-      return NodeInfo.withVmofile(new Vmofile(
+      return NodeInfo.withVmofile(Vmofile(
           vmo: duplicatedVmo, offset: 0, length: _vmo.getSize().size));
     }
 
diff --git a/public/dart/fuchsia_vfs/test/pseudo_dir_test.dart b/public/dart/fuchsia_vfs/test/pseudo_dir_test.dart
index 1bdb58e..be3117e 100644
--- a/public/dart/fuchsia_vfs/test/pseudo_dir_test.dart
+++ b/public/dart/fuchsia_vfs/test/pseudo_dir_test.dart
@@ -639,7 +639,7 @@
         _validateExpectedDirents(expectedDirents, response);
       });
 
-      test('readdir works when new node is added', () async {
+      test('readdir works when node is added', () async {
         PseudoDir dir = PseudoDir();
         PseudoDir subDir = PseudoDir();
         var file1 = PseudoFile.readOnlyStr(() => 'file1');
@@ -663,7 +663,7 @@
         _validateExpectedDirents(expectedDirents, response);
       });
 
-      test('readdir works when new node is added and only first node was read',
+      test('readdir works when node is added and only first node was read',
           () async {
         PseudoDir dir = PseudoDir();
         PseudoDir subDir = PseudoDir();
diff --git a/public/dart/fuchsia_vfs/test/service_test.dart b/public/dart/fuchsia_vfs/test/service_test.dart
index 0ac039d..88b8273 100644
--- a/public/dart/fuchsia_vfs/test/service_test.dart
+++ b/public/dart/fuchsia_vfs/test/service_test.dart
@@ -39,7 +39,7 @@
 
     test('connect to service fails for bad flags and check status', () async {
       for (var unsupportedFlag in unsupportedFlags) {
-        _EchoImpl echo = new _EchoImpl();
+        _EchoImpl echo = _EchoImpl();
         Service<Echo> service = Service.withConnector(echo.bind);
         EchoProxy echoProxy = EchoProxy();
         var expectedStatus = ZX.ERR_NOT_SUPPORTED;
@@ -143,7 +143,7 @@
 class _FsWithEchoService {
   final io_fidl.DirectoryProxy dirProxy = io_fidl.DirectoryProxy();
   final PseudoDir _dir = PseudoDir();
-  _EchoImpl echo = new _EchoImpl();
+  _EchoImpl echo = _EchoImpl();
 
   _FsWithEchoService() {
     Service<Echo> service = Service.withConnector(echo.bind);
@@ -155,7 +155,7 @@
 }
 
 class _EchoImpl extends Echo {
-  final EchoBinding _binding = new EchoBinding();
+  final EchoBinding _binding = EchoBinding();
 
   void bind(InterfaceRequest<Echo> request) {
     _binding.bind(this, request);
diff --git a/public/dart/fuchsia_vfs/test/vmo_file_test.dart b/public/dart/fuchsia_vfs/test/vmo_file_test.dart
index e499e83..0acf73e 100644
--- a/public/dart/fuchsia_vfs/test/vmo_file_test.dart
+++ b/public/dart/fuchsia_vfs/test/vmo_file_test.dart
@@ -22,7 +22,7 @@
         SizedVmo.fromUint8List(Uint8List.fromList(str.codeUnits));
 
     _ReadOnlyFile file = _ReadOnlyFile()
-      ..vmoFile = VmoFile.readOnly(new Vmo(sizedVmo.handle), mode)
+      ..vmoFile = VmoFile.readOnly(Vmo(sizedVmo.handle), mode)
       ..proxy = FileProxy();
     expect(
         file.vmoFile
diff --git a/public/dart/sledge/lib/src/conflict_resolver/conflict_resolver.dart b/public/dart/sledge/lib/src/conflict_resolver/conflict_resolver.dart
index a22e0d7..8fc23bf 100644
--- a/public/dart/sledge/lib/src/conflict_resolver/conflict_resolver.dart
+++ b/public/dart/sledge/lib/src/conflict_resolver/conflict_resolver.dart
@@ -35,8 +35,8 @@
       InterfaceHandle<ledger.PageSnapshot> commonVersion,
       InterfaceHandle<ledger.MergeResultProvider> newResultProvider) async {
     // Obtain the left and right snapshots.
-    ledger.PageSnapshotProxy leftPageSnapshot = new ledger.PageSnapshotProxy();
-    ledger.PageSnapshotProxy rightPageSnapshot = new ledger.PageSnapshotProxy();
+    ledger.PageSnapshotProxy leftPageSnapshot = ledger.PageSnapshotProxy();
+    ledger.PageSnapshotProxy rightPageSnapshot = ledger.PageSnapshotProxy();
     leftPageSnapshot.ctrl.bind(left);
     rightPageSnapshot.ctrl.bind(right);
 
@@ -45,7 +45,7 @@
         await getMapOfAllSchemas(leftPageSnapshot, rightPageSnapshot);
 
     // Find all the KVs that changed.
-    final resultProviderProxy = new ledger.MergeResultProviderProxy();
+    final resultProviderProxy = ledger.MergeResultProviderProxy();
     resultProviderProxy.ctrl.bind(newResultProvider);
     List<ledger.DiffEntry> diffs =
         await getConflictingDiff(resultProviderProxy);
diff --git a/public/dart/sledge/lib/src/conflict_resolver/conflict_resolver_factory.dart b/public/dart/sledge/lib/src/conflict_resolver/conflict_resolver_factory.dart
index 91b0688..3a6e90a 100644
--- a/public/dart/sledge/lib/src/conflict_resolver/conflict_resolver_factory.dart
+++ b/public/dart/sledge/lib/src/conflict_resolver/conflict_resolver_factory.dart
@@ -17,12 +17,12 @@
   // factory as been succesfully set.
   static Completer<bool> _setUpCompleted;
   static final ledger.ConflictResolverFactoryBinding _factoryBinding =
-      new ledger.ConflictResolverFactoryBinding();
+      ledger.ConflictResolverFactoryBinding();
 
   final ledger.ConflictResolverBinding _conflictResolverBinding =
-      new ledger.ConflictResolverBinding();
+      ledger.ConflictResolverBinding();
   // The conflict resolver that resolves conflicts for all the pages.
-  final ConflictResolver _conflictResolver = new ConflictResolver();
+  final ConflictResolver _conflictResolver = ConflictResolver();
 
   ConflictResolverFactory._internal();
 
@@ -32,12 +32,12 @@
     if (_setUpCompleted != null) {
       return _setUpCompleted.future;
     }
-    _setUpCompleted = new Completer<bool>();
+    _setUpCompleted = Completer<bool>();
     final wrapper =
-        _factoryBinding.wrap(new ConflictResolverFactory._internal());
+        _factoryBinding.wrap(ConflictResolverFactory._internal());
     ledgerInstance.setConflictResolverFactory(wrapper, (ledger.Status status) {
       if (status != ledger.Status.ok) {
-        throw new Exception(
+        throw Exception(
             'Sledge failed to SetConflictResolverFactory (status: $status).');
         _setUpCompleted.complete(false);
       } else {
diff --git a/public/dart/sledge/lib/src/conflict_resolver/document_conflict_resolver.dart b/public/dart/sledge/lib/src/conflict_resolver/document_conflict_resolver.dart
index e7a19ef..c3bf03b 100644
--- a/public/dart/sledge/lib/src/conflict_resolver/document_conflict_resolver.dart
+++ b/public/dart/sledge/lib/src/conflict_resolver/document_conflict_resolver.dart
@@ -13,7 +13,7 @@
 Map<DocumentId, List<ledger.DiffEntry>> documentChangeMap(
     List<ledger.DiffEntry> diffs, Map<Uint8List, Schema> map) {
   // TODO: implement.
-  throw new UnimplementedError(
+  throw UnimplementedError(
       'The method `documentChangeMap` is not yet implemented.');
   return <DocumentId, List<ledger.DiffEntry>>{};
 }
diff --git a/public/dart/sledge/lib/src/conflict_resolver/schemas_obtainer.dart b/public/dart/sledge/lib/src/conflict_resolver/schemas_obtainer.dart
index 0e5868e..e6d1f5d 100644
--- a/public/dart/sledge/lib/src/conflict_resolver/schemas_obtainer.dart
+++ b/public/dart/sledge/lib/src/conflict_resolver/schemas_obtainer.dart
@@ -36,7 +36,7 @@
       sledge_storage.prefixForType(sledge_storage.KeyValueType.schema);
   final List<KeyValue> kvs =
       await getEntriesFromSnapshotWithPrefix(snapshot, schemaPrefix);
-  return new Set.from(kvs);
+  return Set.from(kvs);
 }
 
 /// Returns a map between the hash of the individual schemas and the schemas.
@@ -46,7 +46,7 @@
     final schemaHash = getSublistView(schemaKeyValue.key,
         start: sledge_storage.typePrefixLength);
     String jsonString = utf8.decode(schemaKeyValue.value);
-    map[schemaHash] = new Schema.fromJson(json.decode(jsonString));
+    map[schemaHash] = Schema.fromJson(json.decode(jsonString));
   }
   return map;
 }
diff --git a/public/dart/sledge/lib/src/document/change.dart b/public/dart/sledge/lib/src/document/change.dart
index d8d19ca..82d91b3 100644
--- a/public/dart/sledge/lib/src/document/change.dart
+++ b/public/dart/sledge/lib/src/document/change.dart
@@ -28,10 +28,10 @@
 
   /// Returns a new Change with prefix attached to all entries.
   Change withPrefix(Uint8List prefix) {
-    Change result = new Change();
+    Change result = Change();
     for (final change in changedEntries) {
       result.changedEntries.add(
-          new KeyValue(concatUint8Lists(prefix, change.key), change.value));
+          KeyValue(concatUint8Lists(prefix, change.key), change.value));
     }
     for (final key in deletedKeys) {
       result.deletedKeys.add(concatUint8Lists(prefix, key));
@@ -44,13 +44,13 @@
     final splittedChanges = newUint8ListMap<Change>();
     for (final change in changedEntries) {
       final prefix = getSublistView(change.key, end: prefixLen);
-      final newChange = splittedChanges.putIfAbsent(prefix, () => new Change());
-      newChange.changedEntries.add(new KeyValue(
+      final newChange = splittedChanges.putIfAbsent(prefix, () => Change());
+      newChange.changedEntries.add(KeyValue(
           getSublistView(change.key, start: prefixLen), change.value));
     }
     for (final deletion in deletedKeys) {
       final prefix = getSublistView(deletion, end: prefixLen);
-      final newChange = splittedChanges.putIfAbsent(prefix, () => new Change());
+      final newChange = splittedChanges.putIfAbsent(prefix, () => Change());
       newChange.deletedKeys.add(getSublistView(deletion, start: prefixLen));
     }
     return splittedChanges;
diff --git a/public/dart/sledge/lib/src/document/document.dart b/public/dart/sledge/lib/src/document/document.dart
index 45926e2..a7ff806 100644
--- a/public/dart/sledge/lib/src/document/document.dart
+++ b/public/dart/sledge/lib/src/document/document.dart
@@ -41,12 +41,12 @@
   final ConnectionId _connectionId;
   static const int _identifierLength = 21;
   final StreamController<void> _changeController =
-      new StreamController<void>.broadcast();
+      StreamController<void>.broadcast();
 
   /// A value that is set to true for all documents that exist.
   /// If the Document object was created in a rollbacked transaction, then this
   /// field is false and all operations on this object are invalid.
-  final LastOneWinsValue<bool> _documentExists = new LastOneWinsValue<bool>();
+  final LastOneWinsValue<bool> _documentExists = LastOneWinsValue<bool>();
 
   DocumentState _state = DocumentState.available;
 
@@ -82,7 +82,7 @@
 
   Uint8List _createIdentifierForField(String key, _DocumentFieldType type) {
     Uint8List hashOfKey = hash(getUint8ListFromString(key));
-    Uint8List prefix = new Uint8List.fromList([type.index]);
+    Uint8List prefix = Uint8List.fromList([type.index]);
     return concatUint8Lists(prefix, hashOfKey);
   }
 
@@ -94,7 +94,7 @@
 
   /// Gets the change for all fields of this document.
   Change getChange() {
-    Change result = new Change();
+    Change result = Change();
     for (final field in _fields.entries) {
       result.addAll(field.value.getChange().withPrefix(field.key));
     }
@@ -144,10 +144,10 @@
   /// Throws an exception if the document is in an invalid state.
   void _checkExistsState() {
     if (!_documentExists.value) {
-      throw new StateError('Value access to a non-existing document.');
+      throw StateError('Value access to a non-existing document.');
     }
     if (_state != DocumentState.available) {
-      throw new StateError("Can't access a document that is deleted.");
+      throw StateError("Can't access a document that is deleted.");
     }
   }
 
@@ -155,7 +155,7 @@
     _checkExistsState();
     Transaction currentTransaction = _sledge.currentTransaction;
     if (currentTransaction == null) {
-      throw new StateError('Document was changed outside of a transaction.');
+      throw StateError('Document was changed outside of a transaction.');
     }
     currentTransaction.documentWasModified(this);
   }
diff --git a/public/dart/sledge/lib/src/document/document_id.dart b/public/dart/sledge/lib/src/document/document_id.dart
index 4217555..12c3c42 100644
--- a/public/dart/sledge/lib/src/document/document_id.dart
+++ b/public/dart/sledge/lib/src/document/document_id.dart
@@ -26,24 +26,24 @@
   DocumentId(this.schema, [Uint8List identifier]) {
     identifier ??= _randomByteArrayForSubIds();
     if (identifier.length != _subIdByteCount) {
-      throw new ArgumentError(
+      throw ArgumentError(
           'Identifier does not contain $_subIdByteCount bytes.'
           'Found ${identifier.length} bytes instead.');
     }
-    _subId = new Uint8List.fromList(identifier);
+    _subId = Uint8List.fromList(identifier);
   }
 
   /// Convenience factory that builds a DocumentId from the [identifier]'s 8 lowest bytes.
   factory DocumentId.fromIntId(Schema schema, int identifier) {
-    Uint8List bytes = new Uint8List(_subIdByteCount)
+    Uint8List bytes = Uint8List(_subIdByteCount)
       ..buffer.asByteData().setUint64(0, identifier, Endian.little);
-    return new DocumentId(schema, bytes);
+    return DocumentId(schema, bytes);
   }
 
   /// Returns the [prefixLength] bytes long prefix to be used to store in Ledger the
   /// document identified with this DocumentId.
   Uint8List get prefix {
-    Uint8List prefix = new Uint8List(_schemahashByteCount + _subIdByteCount);
+    Uint8List prefix = Uint8List(_schemahashByteCount + _subIdByteCount);
     Uint8List schemaHash = schema.hash;
     assert(schemaHash.length == _schemahashByteCount);
     prefix..setAll(0, schemaHash)..setAll(_schemahashByteCount, _subId);
@@ -51,7 +51,7 @@
   }
 
   /// Returns the identifier that can be used to create the same DocumentId.
-  Uint8List get subId => new Uint8List.fromList(_subId);
+  Uint8List get subId => Uint8List.fromList(_subId);
 
   static Uint8List _randomByteArrayForSubIds() =>
       utils.randomUint8List(_subIdByteCount);
diff --git a/public/dart/sledge/lib/src/document/node_value.dart b/public/dart/sledge/lib/src/document/node_value.dart
index 72b5a48..39afdae 100644
--- a/public/dart/sledge/lib/src/document/node_value.dart
+++ b/public/dart/sledge/lib/src/document/node_value.dart
@@ -48,7 +48,7 @@
   dynamic operator [](String fieldName) {
     Value value = _childValues[fieldName];
     if (value == null) {
-      throw new ArgumentError('Field `$fieldName` does not exist.');
+      throw ArgumentError('Field `$fieldName` does not exist.');
     }
     return value;
   }
diff --git a/public/dart/sledge/lib/src/document/values/compressor.dart b/public/dart/sledge/lib/src/document/values/compressor.dart
index 8ecdf1b..5e65344 100644
--- a/public/dart/sledge/lib/src/document/values/compressor.dart
+++ b/public/dart/sledge/lib/src/document/values/compressor.dart
@@ -16,7 +16,7 @@
 /// ({hash(key)}, {|key|}{key}{value}).
 /// {|key|} is an Uint64 and takes 8 bytes to store.
 class Compressor {
-  static const _listEquality = const ListEquality();
+  static const _listEquality = ListEquality();
   final Map<Uint8List, Uint8List> _keyByHash = newUint8ListMap<Uint8List>();
 
   /// Compress Key
@@ -28,18 +28,18 @@
   KeyValue compressKeyInEntry(KeyValue entry) {
     Uint8List newKey = compressKey(entry.key);
     Uint8List newValue = concatListOfUint8Lists([
-      new Uint8List(8)..buffer.asByteData().setUint64(0, entry.key.length),
+      Uint8List(8)..buffer.asByteData().setUint64(0, entry.key.length),
       entry.key,
       entry.value
     ]);
-    return new KeyValue(newKey, newValue);
+    return KeyValue(newKey, newValue);
   }
 
   /// Uncompress key.
   Uint8List uncompressKey(Uint8List keyHash) {
     final key = _keyByHash[keyHash];
     if (key == null) {
-      throw new InternalSledgeError('Unable to uncompress key `$keyHash`.');
+      throw InternalSledgeError('Unable to uncompress key `$keyHash`.');
     }
     return key;
   }
@@ -47,13 +47,13 @@
   /// Uncompress KeyValue.
   KeyValue uncompressKeyInEntry(KeyValue entry) {
     if (entry.value.length < 8) {
-      throw new InternalSledgeError(
+      throw InternalSledgeError(
           'In a hashed key mode, the value size must be '
           '>= 8. Found ${entry.value.length} instead for entry `$entry`.');
     }
     final keyLength = entry.value.buffer.asByteData().getUint64(0);
     if (entry.value.length < 8 + keyLength) {
-      throw new InternalSledgeError(
+      throw InternalSledgeError(
           'Incorrect format for value of given entry: '
           'The parsed length ($keyLength) is larger than the value content\'s '
           'length (${entry.value.length - 8}). Entry: `$entry`');
@@ -65,10 +65,10 @@
     // Important side effect: result.key is added to _keyByHash.
     final hash = _getAndSaveHashOfKey(key);
     if (!_listEquality.equals(hash, entry.key)) {
-      throw new InternalSledgeError(
+      throw InternalSledgeError(
           'Hash of parsed key is not equal to passed hash (expected `$hash`, got `${entry.key}`).');
     }
-    return new KeyValue(key, value);
+    return KeyValue(key, value);
   }
 
   /// Returns hash of key, and adds (hash, key) pair to caching map.
diff --git a/public/dart/sledge/lib/src/document/values/converted_change.dart b/public/dart/sledge/lib/src/document/values/converted_change.dart
index b2b6509..bdc406d 100644
--- a/public/dart/sledge/lib/src/document/values/converted_change.dart
+++ b/public/dart/sledge/lib/src/document/values/converted_change.dart
@@ -16,8 +16,8 @@
 
   /// Constructor from ConvertedChange.
   MapChange(ConvertedChange<K, V> change)
-      : changedEntries = new Map<K, V>.from(change.changedEntries),
-        deletedKeys = new Set<K>.from(change.deletedKeys);
+      : changedEntries = Map<K, V>.from(change.changedEntries),
+        deletedKeys = Set<K>.from(change.deletedKeys);
 }
 
 /// Interface to get changes applied to SetValue.
@@ -31,7 +31,7 @@
   /// Constructor from MapChange.
   SetChange(ConvertedChange<E, E> change)
       : insertedElements = change.changedEntries.keys.toSet(),
-        deletedElements = new Set<E>.from(change.deletedKeys);
+        deletedElements = Set<E>.from(change.deletedKeys);
 }
 
 /// Interface to get changes applied to OrderedList.
@@ -64,8 +64,8 @@
 
   /// Copy constructor.
   ConvertedChange.from(ConvertedChange<K, V> change)
-      : changedEntries = new Map.from(change.changedEntries),
-        deletedKeys = new Set.from(change.deletedKeys);
+      : changedEntries = Map.from(change.changedEntries),
+        deletedKeys = Set.from(change.deletedKeys);
 
   /// Clears all changes.
   void clear() {
diff --git a/public/dart/sledge/lib/src/document/values/converter.dart b/public/dart/sledge/lib/src/document/values/converter.dart
index 3e6fc4d..ad1ae77 100644
--- a/public/dart/sledge/lib/src/document/values/converter.dart
+++ b/public/dart/sledge/lib/src/document/values/converter.dart
@@ -16,7 +16,7 @@
   factory Converter() {
     final result = _converters[T];
     if (result == null) {
-      throw new InternalSledgeError('No converter found for type `$T`.');
+      throw InternalSledgeError('No converter found for type `$T`.');
     }
     return result;
   }
@@ -35,17 +35,17 @@
 class MapToKVListConverter<K, V> {
   final Converter<K> _keyConverter;
   final Converter<V> _valueConverter;
-  final Compressor _compressor = new Compressor();
+  final Compressor _compressor = Compressor();
 
   /// Constructor.
   MapToKVListConverter({Converter<K> keyConverter, Converter<V> valueConverter})
-      : _keyConverter = keyConverter ?? new Converter<K>(),
-        _valueConverter = valueConverter ?? new Converter<V>();
+      : _keyConverter = keyConverter ?? Converter<K>(),
+        _valueConverter = valueConverter ?? Converter<V>();
 
   /// Converts from List<KeyValue> to Map<K, V>.
   ConvertedChange<K, V> deserialize(final Change _input) {
     final input = _uncompressKeysInChange(_input);
-    final result = new ConvertedChange<K, V>();
+    final result = ConvertedChange<K, V>();
     for (var keyValue in input.changedEntries) {
       result.changedEntries[_keyConverter.deserialize(keyValue.key)] =
           _valueConverter.deserialize(keyValue.value);
@@ -58,9 +58,9 @@
 
   /// Converts from Map<K, V> to List<KeyValue>.
   Change serialize(final ConvertedChange<K, V> input) {
-    final Change result = new Change();
+    final Change result = Change();
     for (final changedEntry in input.changedEntries.entries) {
-      result.changedEntries.add(new KeyValue(
+      result.changedEntries.add(KeyValue(
           _keyConverter.serialize(changedEntry.key),
           _valueConverter.serialize(changedEntry.value)));
     }
@@ -72,7 +72,7 @@
 
   /// Restores (key, value)s from stored in Ledger state.
   Change _uncompressKeysInChange(final Change input) {
-    Change result = new Change();
+    Change result = Change();
     for (final entry in input.changedEntries) {
       result.changedEntries.add(_compressor.uncompressKeyInEntry(entry));
     }
@@ -84,7 +84,7 @@
 
   /// Prepares (key, value)s to store in Ledger. (getting rid of long keys)
   Change _compressKeysInChange(final Change input) {
-    Change result = new Change();
+    Change result = Change();
     for (final entry in input.changedEntries) {
       result.changedEntries.add(_compressor.compressKeyInEntry(entry));
     }
@@ -106,16 +106,16 @@
   @override
   String deserialize(final Uint8List x) {
     if (x.length.isOdd) {
-      throw new InternalSledgeError(
+      throw InternalSledgeError(
           'Cannot parse String. Length should be even.');
     }
-    return new String.fromCharCodes(
+    return String.fromCharCodes(
         x.buffer.asUint16List(x.offsetInBytes, x.lengthInBytes ~/ 2));
   }
 
   @override
   Uint8List serialize(final String x) {
-    return new Uint16List.fromList(x.codeUnits).buffer.asUint8List();
+    return Uint16List.fromList(x.codeUnits).buffer.asUint8List();
   }
 }
 
@@ -132,7 +132,7 @@
   @override
   int deserialize(final Uint8List x) {
     if (x.length != _serializationLength) {
-      throw new InternalSledgeError(
+      throw InternalSledgeError(
           "Can't parse int: Length should be $_serializationLength, "
           'found ${x.length} instead for input: `$x`.');
     }
@@ -141,7 +141,7 @@
 
   @override
   Uint8List serialize(final int x) =>
-      new Uint8List(_serializationLength)..buffer.asByteData().setInt64(0, x);
+      Uint8List(_serializationLength)..buffer.asByteData().setInt64(0, x);
 }
 
 /// Converter for double.
@@ -157,7 +157,7 @@
   @override
   double deserialize(final Uint8List x) {
     if (x.length != _serializationLength) {
-      throw new InternalSledgeError(
+      throw InternalSledgeError(
           "Can't parse double: Length should be $_serializationLength, "
           'found ${x.length} instead for input: `$x`.');
     }
@@ -166,7 +166,7 @@
 
   @override
   Uint8List serialize(final double x) =>
-      new Uint8List(_serializationLength)..buffer.asByteData().setFloat64(0, x);
+      Uint8List(_serializationLength)..buffer.asByteData().setFloat64(0, x);
 }
 
 /// Converter for bool.
@@ -180,12 +180,12 @@
   @override
   bool deserialize(final Uint8List x) {
     if (x.lengthInBytes != 1) {
-      throw new InternalSledgeError(
+      throw InternalSledgeError(
           "Can't parse bool. Length should be 1,"
           'found ${x.lengthInBytes} bytes instead.');
     }
     if (x[0] != 0 && x[0] != 1) {
-      throw new InternalSledgeError(
+      throw InternalSledgeError(
           "Can't parse bool. Value should be 0 or 1, "
           'found ${x[0]} bytes instead.');
     }
@@ -195,7 +195,7 @@
   @override
   // ignore: avoid_positional_boolean_parameters
   Uint8List serialize(final bool x) {
-    return new Uint8List.fromList([x ? 1 : 0]);
+    return Uint8List.fromList([x ? 1 : 0]);
   }
 }
 
@@ -205,7 +205,7 @@
   const Uint8ListConverter();
 
   @override
-  Uint8List get defaultValue => new Uint8List(0);
+  Uint8List get defaultValue => Uint8List(0);
 
   @override
   Uint8List deserialize(final Uint8List x) => x;
@@ -233,13 +233,13 @@
   @override
   num deserialize(final Uint8List x) {
     if (x.length != _serializationLength) {
-      throw new InternalSledgeError(
+      throw InternalSledgeError(
           "Can't parse double: Length should be $_serializationLength, "
           'found ${x.length} instead for input: `$x`.');
     }
 
     if (x[0] >= _NumInternalType.values.length) {
-      throw new InternalSledgeError(
+      throw InternalSledgeError(
           "Can't parse double: First byte should be 0 or 1, "
           'found ${x[0]} instead.');
     }
@@ -259,7 +259,7 @@
 
   @override
   Uint8List serialize(final num x) {
-    final list = new Uint8List(_serializationLength);
+    final list = Uint8List(_serializationLength);
     final byteData = list.buffer.asByteData();
     if (x.runtimeType == int) {
       byteData
@@ -274,11 +274,11 @@
   }
 }
 
-const _converters = const <Type, Converter>{
-  int: const IntConverter(),
-  String: const StringConverter(),
-  double: const DoubleConverter(),
-  bool: const BoolConverter(),
-  Uint8List: const Uint8ListConverter(),
-  num: const NumConverter(),
+const _converters = <Type, Converter>{
+  int: IntConverter(),
+  String: StringConverter(),
+  double: DoubleConverter(),
+  bool: BoolConverter(),
+  Uint8List: Uint8ListConverter(),
+  num: NumConverter(),
 };
diff --git a/public/dart/sledge/lib/src/document/values/key_value_storage.dart b/public/dart/sledge/lib/src/document/values/key_value_storage.dart
index 02027d7..7ff5691 100644
--- a/public/dart/sledge/lib/src/document/values/key_value_storage.dart
+++ b/public/dart/sledge/lib/src/document/values/key_value_storage.dart
@@ -20,10 +20,10 @@
 
   /// Creates a storage using the provided [equals] as equality.
   KeyValueStorage({bool equals(K key1, K key2), int hashCode(K key)})
-      : _storage = new HashMap<K, V>(equals: equals, hashCode: hashCode),
-        _changeToRollback = new ConvertedChange(
-            new HashMap<K, V>(equals: equals, hashCode: hashCode),
-            new HashSet<K>(equals: equals, hashCode: hashCode));
+      : _storage = HashMap<K, V>(equals: equals, hashCode: hashCode),
+        _changeToRollback = ConvertedChange(
+            HashMap<K, V>(equals: equals, hashCode: hashCode),
+            HashSet<K>(equals: equals, hashCode: hashCode));
 
   @override
   V operator [](Object key) => _storage[key];
@@ -59,7 +59,7 @@
 
   /// Retrieves the current transaction's data.
   ConvertedChange<K, V> getChange() {
-    final change = new ConvertedChange<K, V>();
+    final change = ConvertedChange<K, V>();
     // [_changeToRollback.deletedKeys] is a collection of keys that were not in
     // [_storage] when the transaction started, but were affected by this
     // transaction.
diff --git a/public/dart/sledge/lib/src/document/values/last_one_wins_value.dart b/public/dart/sledge/lib/src/document/values/last_one_wins_value.dart
index b5aafca..fe6c9ab 100644
--- a/public/dart/sledge/lib/src/document/values/last_one_wins_value.dart
+++ b/public/dart/sledge/lib/src/document/values/last_one_wins_value.dart
@@ -14,7 +14,7 @@
   T _value;
   T _valueToRollback;
   final StreamController<T> _changeController =
-      new StreamController<T>.broadcast();
+      StreamController<T>.broadcast();
 
   _LastOneWinsValue(this._value);
 
@@ -30,9 +30,9 @@
   ConvertedChange<int, T> getChange() {
     if (_valueToRollback == null) {
       // If there's nothing to rollback, no changes have been done.
-      return new ConvertedChange<int, T>();
+      return ConvertedChange<int, T>();
     }
-    return new ConvertedChange<int, T>(<int, T>{0: _value});
+    return ConvertedChange<int, T>(<int, T>{0: _value});
   }
 
   void applyChange(ConvertedChange<int, T> change) {
@@ -40,13 +40,13 @@
       return;
     }
     if (change.deletedKeys.isNotEmpty) {
-      throw new FormatException(
+      throw FormatException(
           'There should be no deleted keys. Found `${change.deletedKeys}`.',
           change);
     }
     if (change.changedEntries.length != 1 ||
         !change.changedEntries.containsKey(0)) {
-      throw new FormatException('Changes have unsupported format.', change);
+      throw FormatException('Changes have unsupported format.', change);
     }
     _value = change.changedEntries[0];
     _changeController.add(_value);
@@ -72,9 +72,9 @@
 
   /// Default constructor.
   LastOneWinsValue([Change init])
-      : _converter = new MapToKVListConverter<int, T>(),
-        _value = new _LastOneWinsValue<T>(new Converter<T>().defaultValue) {
-    applyChange(init ?? new Change());
+      : _converter = MapToKVListConverter<int, T>(),
+        _value = _LastOneWinsValue<T>(Converter<T>().defaultValue) {
+    applyChange(init ?? Change());
   }
 
   @override
diff --git a/public/dart/sledge/lib/src/document/values/map_value.dart b/public/dart/sledge/lib/src/document/values/map_value.dart
index f8aedac..c4c8993 100644
--- a/public/dart/sledge/lib/src/document/values/map_value.dart
+++ b/public/dart/sledge/lib/src/document/values/map_value.dart
@@ -18,13 +18,13 @@
     implements LeafValue {
   final KeyValueStorage<K, V> _map;
   final StreamController<MapChange<K, V>> _changeController =
-      new StreamController<MapChange<K, V>>.broadcast();
+      StreamController<MapChange<K, V>>.broadcast();
   final MapToKVListConverter _converter;
 
   /// Creates a MapValue with provided [equals] as equality.
   MapValue({bool equals(K key1, K key2), int hashCode(K key)})
-      : _converter = new MapToKVListConverter<K, V>(),
-        _map = new KeyValueStorage<K, V>(equals: equals, hashCode: hashCode);
+      : _converter = MapToKVListConverter<K, V>(),
+        _map = KeyValueStorage<K, V>(equals: equals, hashCode: hashCode);
 
   @override
   Change getChange() => _converter.serialize(_map.getChange());
@@ -38,7 +38,7 @@
   void applyChange(Change input) {
     final change = _converter.deserialize(input);
     _map.applyChange(change);
-    _changeController.add(new MapChange<K, V>(change));
+    _changeController.add(MapChange<K, V>(change));
   }
 
   @override
diff --git a/public/dart/sledge/lib/src/document/values/ordered_list_tree_path.dart b/public/dart/sledge/lib/src/document/values/ordered_list_tree_path.dart
index 8536cfc..c0ca647 100644
--- a/public/dart/sledge/lib/src/document/values/ordered_list_tree_path.dart
+++ b/public/dart/sledge/lib/src/document/values/ordered_list_tree_path.dart
@@ -13,7 +13,7 @@
 // Length of a bytelist, written on edge to value node.
 // Bytelist content is: {1}{timetamp}, {timestamp} is 8 bytes long.
 const _nodeValueSuffixLength = 9;
-const _listEquality = const ListEquality();
+const _listEquality = ListEquality();
 
 /// Type of child.
 enum ChildType {
@@ -40,7 +40,7 @@
       : this(concatListOfUint8Lists([parent._data]..addAll(labels)));
 
   /// Creates OrderedListTreePath corresponding to tree root.
-  OrderedListTreePath.root() : this(new Uint8List(_nodeValueSuffixLength));
+  OrderedListTreePath.root() : this(Uint8List(_nodeValueSuffixLength));
 
   /// Checks if node is a child of a [parent].
   bool isDescendant(OrderedListTreePath parent) {
@@ -59,27 +59,27 @@
   /// Returns path to parent implicit node, for value node.
   OrderedListTreePath parentPath() {
     // Remove appendix corresponding to value from path.
-    return new OrderedListTreePath(new Uint8List.fromList(
+    return OrderedListTreePath(Uint8List.fromList(
         _data.getRange(0, _data.length - _nodeValueSuffixLength).toList()));
   }
 
   /// Returns OrderedListTreePath representing child of this.
   OrderedListTreePath getChild(
       ChildType side, Uint8List instanceId, Uint8List timestamp) {
-    return new OrderedListTreePath.fromParent(
+    return OrderedListTreePath.fromParent(
         // ----------------
         // Path to implicit node:
         // 1. path to parent implicit node
         parentPath(),
         [
           // 2. direction ([left] or [right]).
-          new Uint8List.fromList([side.index]),
+          Uint8List.fromList([side.index]),
           // 3. id of current instance
           instanceId,
           // ----------------
           // Appendix for path to value:
           // 1. direction ([value])
-          new Uint8List.fromList([ChildType.value.index]),
+          Uint8List.fromList([ChildType.value.index]),
           // 2. timestamp
           timestamp
         ]);
@@ -109,11 +109,11 @@
 
   @override
   OrderedListTreePath get defaultValue =>
-      new OrderedListTreePath(new Uint8List(0));
+      OrderedListTreePath(Uint8List(0));
 
   @override
   OrderedListTreePath deserialize(final Uint8List x) =>
-      new OrderedListTreePath(x);
+      OrderedListTreePath(x);
 
   @override
   Uint8List serialize(final OrderedListTreePath x) => x._data;
@@ -121,4 +121,4 @@
 
 /// Public const instance of OrderedListTreePathConverter.
 const OrderedListTreePathConverter orderedListTreePathConverter =
-    const OrderedListTreePathConverter();
+    OrderedListTreePathConverter();
diff --git a/public/dart/sledge/lib/src/document/values/ordered_list_value.dart b/public/dart/sledge/lib/src/document/values/ordered_list_value.dart
index 6651927..d0cc5c5 100644
--- a/public/dart/sledge/lib/src/document/values/ordered_list_value.dart
+++ b/public/dart/sledge/lib/src/document/values/ordered_list_value.dart
@@ -127,17 +127,17 @@
   final KeyValueStorage<OrderedListTreePath, E> _storage;
   final Uint8List _instanceId;
   int _incrementalTime = 0;
-  final OrderedListTreePath _root = new OrderedListTreePath.root();
+  final OrderedListTreePath _root = OrderedListTreePath.root();
   final StreamController<OrderedListChange<E>> _changeController =
-      new StreamController<OrderedListChange<E>>.broadcast();
+      StreamController<OrderedListChange<E>>.broadcast();
   final MapToKVListConverter _converter;
   final bool Function(E, E) _equals;
 
   /// Default constructor.
   OrderedListValue(this._instanceId, {bool equals(E element1, E element2)})
-      : _converter = new MapToKVListConverter<OrderedListTreePath, E>(
+      : _converter = MapToKVListConverter<OrderedListTreePath, E>(
             keyConverter: orderedListTreePathConverter),
-        _storage = new KeyValueStorage<OrderedListTreePath, E>(),
+        _storage = KeyValueStorage<OrderedListTreePath, E>(),
         _equals = equals ?? ((E element1, E element2) => element1 == element2);
 
   @override
@@ -147,7 +147,7 @@
   void insert(int index, E element) {
     final sortedKeys = _sortedKeysList();
     if (index < 0 || index > sortedKeys.length) {
-      throw new RangeError.value(index, 'index', 'Index is out of range.');
+      throw RangeError.value(index, 'index', 'Index is out of range.');
     }
 
     OrderedListTreePath newKey;
@@ -172,7 +172,7 @@
   @override
   void insertAll(int index, Iterable<E> iterable) {
     if (index < 0 || index > length) {
-      throw new RangeError.value(index, 'index', 'Index is out of range.');
+      throw RangeError.value(index, 'index', 'Index is out of range.');
     }
     int insertIndex = index;
     for (final element in iterable) {
@@ -269,7 +269,7 @@
   set length(int newLength) {
     // This list is not fixed length.
     // However, it does not support the length setter because [null] cannot be stored.
-    throw new UnsupportedError('Length setter is not supported.');
+    throw UnsupportedError('Length setter is not supported.');
   }
 
   @override
@@ -315,7 +315,7 @@
     final keys = _sortedKeysList();
     // We are add deleted keys in case this change is done on our
     // connection. In other cases deletedKeys should be in keys.
-    final startKeys = (new SplayTreeSet<OrderedListTreePath>()
+    final startKeys = (SplayTreeSet<OrderedListTreePath>()
           ..addAll(keys)
           ..addAll(change.deletedKeys))
         .toList();
@@ -328,14 +328,14 @@
     }
     _storage.applyChange(change);
     final keysFinal = _sortedKeysList();
-    final insertedElements = new SplayTreeMap<int, E>();
+    final insertedElements = SplayTreeMap<int, E>();
     for (int i = 0; i < keysFinal.length; i++) {
       if (change.changedEntries.containsKey(keysFinal[i])) {
         insertedElements[i] = change.changedEntries[keysFinal[i]];
       }
     }
     _changeController
-        .add(new OrderedListChange(deletedPositions, insertedElements));
+        .add(OrderedListChange(deletedPositions, insertedElements));
   }
 
   @override
@@ -350,6 +350,6 @@
 
   Uint8List get _timestamp {
     _incrementalTime += 1;
-    return new Uint8List(8)..buffer.asByteData().setUint64(0, _incrementalTime);
+    return Uint8List(8)..buffer.asByteData().setUint64(0, _incrementalTime);
   }
 }
diff --git a/public/dart/sledge/lib/src/document/values/pos_neg_counter_value.dart b/public/dart/sledge/lib/src/document/values/pos_neg_counter_value.dart
index fc4830c..8fdf2d6 100644
--- a/public/dart/sledge/lib/src/document/values/pos_neg_counter_value.dart
+++ b/public/dart/sledge/lib/src/document/values/pos_neg_counter_value.dart
@@ -29,23 +29,23 @@
   T _sum;
   final T _defaultValue;
   final StreamController<T> _changeController =
-      new StreamController<T>.broadcast();
-  static final _listEquality = new ListEquality();
+      StreamController<T>.broadcast();
+  static final _listEquality = ListEquality();
   final MapToKVListConverter<Uint8List, T> _converter;
 
   /// Default constructor.
   PosNegCounterValue(this._currentInstanceId)
-      : _defaultValue = new Converter<T>().defaultValue,
-        _converter = new MapToKVListConverter<Uint8List, T>(),
-        _storage = new KeyValueStorage<Uint8List, T>(
+      : _defaultValue = Converter<T>().defaultValue,
+        _converter = MapToKVListConverter<Uint8List, T>(),
+        _storage = KeyValueStorage<Uint8List, T>(
             equals: _listEquality.equals, hashCode: _listEquality.hash) {
     _sum = _defaultValue;
   }
 
   Uint8List get _positiveKey =>
-      concatUint8Lists(new Uint8List.fromList([0]), _currentInstanceId);
+      concatUint8Lists(Uint8List.fromList([0]), _currentInstanceId);
   Uint8List get _negativeKey =>
-      concatUint8Lists(new Uint8List.fromList([1]), _currentInstanceId);
+      concatUint8Lists(Uint8List.fromList([1]), _currentInstanceId);
   bool _isKeyPositive(Uint8List key) => key[0] == 0;
 
   @override
diff --git a/public/dart/sledge/lib/src/document/values/set_value.dart b/public/dart/sledge/lib/src/document/values/set_value.dart
index 94a8216..305c8c4 100644
--- a/public/dart/sledge/lib/src/document/values/set_value.dart
+++ b/public/dart/sledge/lib/src/document/values/set_value.dart
@@ -19,14 +19,14 @@
   final KeyValueStorage<E, E> _map;
   final MapToKVListConverter<E, bool> _converter;
   final StreamController<SetChange<E>> _changeController =
-      new StreamController<SetChange<E>>.broadcast();
+      StreamController<SetChange<E>>.broadcast();
 
   // TODO: consider Converter as a provider of [equals] and [hashCode] methods.
   /// Creates a SetValue with provided [equals] as equality.
   /// It should be coherent with encoding of [E] done by Converter.
   SetValue({bool equals(E entry1, E entry2), int hashCode(E entry)})
-      : _map = new KeyValueStorage<E, E>(equals: equals, hashCode: hashCode),
-        _converter = new MapToKVListConverter<E, bool>();
+      : _map = KeyValueStorage<E, E>(equals: equals, hashCode: hashCode),
+        _converter = MapToKVListConverter<E, bool>();
 
   @override
   Change getChange() => _converter.serialize(_removeValue(_map.getChange()));
@@ -40,7 +40,7 @@
   void applyChange(Change input) {
     final change = _copyKeyToValue(_converter.deserialize(input));
     _map.applyChange(change);
-    _changeController.add(new SetChange<E>(change));
+    _changeController.add(SetChange<E>(change));
   }
 
   @override
@@ -94,15 +94,15 @@
   Stream<SetChange<E>> get onChange => _changeController.stream;
 
   ConvertedChange<E, bool> _removeValue(ConvertedChange<E, E> change) {
-    return new ConvertedChange<E, bool>(
-        new Map<E, bool>.fromIterable(change.changedEntries.keys,
+    return ConvertedChange<E, bool>(
+        Map<E, bool>.fromIterable(change.changedEntries.keys,
             value: (item) => true),
         change.deletedKeys);
   }
 
   ConvertedChange<E, E> _copyKeyToValue(ConvertedChange<E, bool> change) {
-    return new ConvertedChange<E, E>(
-        new Map<E, E>.fromIterable(change.changedEntries.keys),
+    return ConvertedChange<E, E>(
+        Map<E, E>.fromIterable(change.changedEntries.keys),
         change.deletedKeys);
   }
 }
diff --git a/public/dart/sledge/lib/src/ledger_helpers.dart b/public/dart/sledge/lib/src/ledger_helpers.dart
index 52ff8d9..5b4cd48 100644
--- a/public/dart/sledge/lib/src/ledger_helpers.dart
+++ b/public/dart/sledge/lib/src/ledger_helpers.dart
@@ -27,17 +27,17 @@
 class LedgerObjectsFactoryImpl implements LedgerObjectsFactory {
   @override
   ledger.PageSnapshotProxy newPageSnapshotProxy() =>
-      new ledger.PageSnapshotProxy();
+      ledger.PageSnapshotProxy();
 
   @override
   ledger.PageWatcherBinding newPageWatcherBinding() =>
-      new ledger.PageWatcherBinding();
+      ledger.PageWatcherBinding();
 }
 
 /// Throws an exception containing [operation] if the status is not `ok`.
 void checkStatus(ledger.Status status, String operation) {
   if (status != ledger.Status.ok) {
-    throw new Exception('Ledger operation `$operation` failed.');
+    throw Exception('Ledger operation `$operation` failed.');
   }
 }
 
@@ -45,12 +45,12 @@
 Uint8List readBuffer(Buffer buffer) {
   ReadResult readResult = buffer.vmo.read(buffer.size);
   if (readResult.status != ZX.OK) {
-    throw new Exception('Unable to read from vmo `${readResult.status}`.');
+    throw Exception('Unable to read from vmo `${readResult.status}`.');
   }
   if (readResult.bytes.lengthInBytes != buffer.size) {
-    throw new Exception('Unexpected count of bytes read.');
+    throw Exception('Unexpected count of bytes read.');
   }
-  return new Uint8List.view(readResult.bytes.buffer);
+  return Uint8List.view(readResult.bytes.buffer);
 }
 
 /// Helper method for the [getFullEntries] method.
@@ -60,11 +60,11 @@
   List<int> keyPrefix, {
   ledger.Token token,
 }) async {
-  Completer<ledger.Status> statusCompleter = new Completer<ledger.Status>();
+  Completer<ledger.Status> statusCompleter = Completer<ledger.Status>();
   List<ledger.Entry> entries;
   ledger.Token nextToken;
 
-  snapshot.getEntries(keyPrefix ?? new Uint8List(0), token,
+  snapshot.getEntries(keyPrefix ?? Uint8List(0), token,
       (ledger.Status status, List<ledger.Entry> entriesResult,
           ledger.Token nextTokenResult) {
     entries = entriesResult;
@@ -75,7 +75,7 @@
   ledger.Status status = await statusCompleter.future;
 
   if (status != ledger.Status.ok && status != ledger.Status.partialResult) {
-    throw new Exception(
+    throw Exception(
         'PageSnapshot::GetEntries() returned an error status: $status');
   }
 
@@ -116,17 +116,17 @@
   for (final entry in entries) {
     Uint8List k = entry.key;
     Uint8List v = readBuffer(entry.value);
-    keyValues.add(new KeyValue(k, v));
+    keyValues.add(KeyValue(k, v));
   }
   return keyValues;
 }
 
 /// Returns Change with the same content as a pageChange.
 Change getChangeFromPageChange(ledger.PageChange pageChange) {
-  return new Change(
+  return Change(
       pageChange.changedEntries
           .map((ledger.Entry entry) =>
-              new KeyValue(entry.key, readBuffer(entry.value)))
+              KeyValue(entry.key, readBuffer(entry.value)))
           .toList(),
       pageChange.deletedKeys);
 }
diff --git a/public/dart/sledge/lib/src/modification_queue.dart b/public/dart/sledge/lib/src/modification_queue.dart
index 2eb2699..8515748 100644
--- a/public/dart/sledge/lib/src/modification_queue.dart
+++ b/public/dart/sledge/lib/src/modification_queue.dart
@@ -14,7 +14,7 @@
 /// Holds a Modification and a Completer. The [completer] completes
 /// when [modification] has been ran.
 class _Task {
-  final Completer<bool> completer = new Completer<bool>();
+  final Completer<bool> completer = Completer<bool>();
   final Modification modification;
   _Task(this.modification);
 }
@@ -22,7 +22,7 @@
 /// A queue of modifications that gets ran in transactions.
 class ModificationQueue {
   Transaction _currentTransaction;
-  final Queue<_Task> _tasks = new ListQueue<_Task>();
+  final Queue<_Task> _tasks = ListQueue<_Task>();
   final Sledge _sledge;
   final LedgerObjectsFactory _ledgerObjectsFactory;
   final ledger.PageProxy _pageProxy;
@@ -42,7 +42,7 @@
       taskToAwait = _tasks.last;
     }
 
-    final task = new _Task(modification);
+    final task = _Task(modification);
     _tasks.add(task);
 
     // If some task was in the queue, await its completion.
@@ -54,7 +54,7 @@
 
     // Create a transaction from [modifications], run it, and await its end.
     _currentTransaction =
-        new Transaction(_sledge, _pageProxy, _ledgerObjectsFactory);
+        Transaction(_sledge, _pageProxy, _ledgerObjectsFactory);
 
     try {
       return await _currentTransaction.saveModification(modification);
diff --git a/public/dart/sledge/lib/src/query/field_value.dart b/public/dart/sledge/lib/src/query/field_value.dart
index c2241bb..ce475e5 100644
--- a/public/dart/sledge/lib/src/query/field_value.dart
+++ b/public/dart/sledge/lib/src/query/field_value.dart
@@ -24,7 +24,7 @@
 /// Template to ease the implementation of FieldValue specializations.
 abstract class _TemplatedFieldValue<T extends Comparable<T>>
     implements FieldValue {
-  final _converter = new Converter<T>();
+  final _converter = Converter<T>();
   T _value;
 
   _TemplatedFieldValue(this._value);
@@ -70,6 +70,6 @@
     if (documentValue is LastOneWinsValue<double>) {
       return documentValue.value;
     }
-    throw new ArgumentError('`documentValue` does not store a num.');
+    throw ArgumentError('`documentValue` does not store a num.');
   }
 }
diff --git a/public/dart/sledge/lib/src/query/index_definition.dart b/public/dart/sledge/lib/src/query/index_definition.dart
index f57d1c9..a9a5079 100644
--- a/public/dart/sledge/lib/src/query/index_definition.dart
+++ b/public/dart/sledge/lib/src/query/index_definition.dart
@@ -20,7 +20,7 @@
 
   /// Stores the name of the field concerned by the index, and what kind of comparison is
   /// done over the said field.
-  final _filterMap = new SplayTreeMap<String, _ComparisonType>();
+  final _filterMap = SplayTreeMap<String, _ComparisonType>();
 
   static const _jsonFieldsMapKey = 'fields';
   static const _jsonSchemaKey = 'schema';
@@ -36,11 +36,11 @@
     for (final fieldWithEquality in fieldsWithEquality) {
       _checkBelongsToSchema(fieldWithEquality);
       if (_filterMap.containsKey(fieldWithEquality)) {
-        throw new ArgumentError(
+        throw ArgumentError(
             'Field `$fieldWithEquality` must not appear multiple times in fieldsWithEquality.');
       }
       if (fieldWithInequality == fieldWithEquality) {
-        throw new ArgumentError(
+        throw ArgumentError(
             'Field `$fieldWithEquality` must not be part of both fieldsWithEquality and fieldWithInequality.');
       }
       _filterMap[fieldWithEquality] = _ComparisonType.equality;
@@ -67,7 +67,7 @@
       }
     });
     Schema schema = Schema.fromJson(map[_jsonSchemaKey]);
-    return new IndexDefinition(schema,
+    return IndexDefinition(schema,
         fieldsWithEquality: fieldsWithEquality,
         fieldWithInequality: fieldWithInequality);
   }
@@ -76,7 +76,7 @@
   /// Called by dart:convert's JsonCodec.
   dynamic toJson() {
     Map<String, int> jsonFieldMap = _filterMap
-        .map((key, value) => new MapEntry<String, int>(key, value.index));
+        .map((key, value) => MapEntry<String, int>(key, value.index));
     final jsonMap = <String, dynamic>{
       _jsonFieldsMapKey: jsonFieldMap,
       _jsonSchemaKey: _schema
@@ -86,7 +86,7 @@
 
   void _checkBelongsToSchema(String field) {
     if (!_schema.schemaDescription.containsKey(field)) {
-      throw new ArgumentError('Field `$field` is not part of the schema.');
+      throw ArgumentError('Field `$field` is not part of the schema.');
     }
   }
 
diff --git a/public/dart/sledge/lib/src/query/query.dart b/public/dart/sledge/lib/src/query/query.dart
index bde8feb..75a12ef 100644
--- a/public/dart/sledge/lib/src/query/query.dart
+++ b/public/dart/sledge/lib/src/query/query.dart
@@ -35,11 +35,11 @@
       _checkComparisonWithField(fieldPath, comparison);
     });
     if (fieldsWithInequalities.length > 1) {
-      throw new ArgumentError(
+      throw ArgumentError(
           'Queries can have at most one inequality. Inequalities founds: $fieldsWithInequalities.');
     }
     _comparisons =
-        new SplayTreeMap<String, QueryFieldComparison>.from(comparisons);
+        SplayTreeMap<String, QueryFieldComparison>.from(comparisons);
   }
 
   /// The Schema of documents returned by this query.
@@ -67,7 +67,7 @@
         utils.hash(utils.concatListOfUint8Lists(equalityValueHashes));
 
     // TODO: get the correct index hash.
-    Uint8List indexHash = new Uint8List(20);
+    Uint8List indexHash = Uint8List(20);
 
     // TODO: take into account the inequality to compute the prefix.
     Uint8List prefix = utils.concatListOfUint8Lists([
@@ -84,7 +84,7 @@
   /// with.
   bool documentMatchesQuery(Document doc) {
     if (doc.documentId.schema != _schema) {
-      throw new ArgumentError(
+      throw ArgumentError(
           'The Document `doc` is of an incorrect Schema type.');
     }
     for (final fieldName in _comparisons.keys) {
@@ -100,7 +100,7 @@
     final expectedType = _schema.fieldAtPath(fieldPath);
     if (!comparison.comparisonValue.comparableTo(expectedType)) {
       String runtimeType = expectedType.runtimeType.toString();
-      throw new ArgumentError(
+      throw ArgumentError(
           'Field `$fieldPath` of type `$runtimeType` is not comparable with `$comparison.comparisonValue`.');
     }
   }
diff --git a/public/dart/sledge/lib/src/query/query_builder.dart b/public/dart/sledge/lib/src/query/query_builder.dart
index d66b287..0e59365 100644
--- a/public/dart/sledge/lib/src/query/query_builder.dart
+++ b/public/dart/sledge/lib/src/query/query_builder.dart
@@ -15,15 +15,15 @@
   void _addFieldComparison(
       String fieldPath, dynamic value, ComparisonType comparison) {
     if (_comparisons.containsKey(fieldPath)) {
-      throw new ArgumentError(
+      throw ArgumentError(
           "Can't add multiple restrictions to the same field ($fieldPath).");
     }
     if (value is num) {
       _comparisons[fieldPath] =
-          new QueryFieldComparison(new NumFieldValue(value), comparison);
+          QueryFieldComparison(NumFieldValue(value), comparison);
       return;
     }
-    throw new ArgumentError(
+    throw ArgumentError(
         'The type `${value.runtimeType.toString()}` used on field `$fieldPath` is not supported in queries.');
   }
 
@@ -74,6 +74,6 @@
 
   /// Returns a new Query possessing all the filters previously added to this.
   Query build() {
-    return new Query(_schema, comparisons: _comparisons);
+    return Query(_schema, comparisons: _comparisons);
   }
 }
diff --git a/public/dart/sledge/lib/src/schema/schema.dart b/public/dart/sledge/lib/src/schema/schema.dart
index 1bb5618..2b531e8 100644
--- a/public/dart/sledge/lib/src/schema/schema.dart
+++ b/public/dart/sledge/lib/src/schema/schema.dart
@@ -42,18 +42,18 @@
   final SplayTreeMap<String, BaseType> _schemaDescription;
   static final Map<String, BaseType> _jsonToType =
       _buildJsonToTypeMap(<BaseType>[
-    new Boolean(),
-    new Integer(),
-    new Double(),
-    new LastOneWinsString(),
-    new LastOneWinsUint8List(),
-    new IntCounter(),
-    new DoubleCounter(),
-    new BytelistMap(),
-    new BytelistSet(),
-    new OrderedList()
+    Boolean(),
+    Integer(),
+    Double(),
+    LastOneWinsString(),
+    LastOneWinsUint8List(),
+    IntCounter(),
+    DoubleCounter(),
+    BytelistMap(),
+    BytelistSet(),
+    OrderedList()
   ]);
-  static const _listEquality = const ListEquality();
+  static const _listEquality = ListEquality();
 
   /// The length of the hash of Schema, as returned by the hash getter.
   static const int hashLength = 20;
@@ -62,10 +62,10 @@
   /// schemas.
   /// Throws an error if a field's name contains the '.' character.
   Schema(Map<String, BaseType> schemaDescription)
-      : _schemaDescription = new SplayTreeMap.from(schemaDescription) {
+      : _schemaDescription = SplayTreeMap.from(schemaDescription) {
     _schemaDescription.forEach((String name, dynamic value) {
       if (name.contains('.')) {
-        throw new ArgumentError(
+        throw ArgumentError(
             'The field `$name` must not contain the `.` character.');
       }
     });
@@ -73,15 +73,15 @@
 
   /// Builds a Schema from a JSON object.
   Schema.fromJson(Map<String, dynamic> map)
-      : _schemaDescription = new SplayTreeMap<String, BaseType>() {
+      : _schemaDescription = SplayTreeMap<String, BaseType>() {
     map.forEach((String name, dynamic value) {
       BaseType type;
       if (value is Map) {
-        type = new Schema.fromJson(value);
+        type = Schema.fromJson(value);
       } else if (value is String) {
         type = _baseTypeFromString(value);
       } else {
-        throw new ArgumentError('Invalid JSON.');
+        throw ArgumentError('Invalid JSON.');
       }
       _schemaDescription[name] = type;
     });
@@ -89,11 +89,11 @@
 
   @override
   Map<String, dynamic> toJson() =>
-      new SplayTreeMap<String, dynamic>.from(_schemaDescription);
+      SplayTreeMap<String, dynamic>.from(_schemaDescription);
 
   @override
   Value newValue(ConnectionId id) {
-    return new NodeValue(_schemaDescription, id);
+    return NodeValue(_schemaDescription, id);
   }
 
   /// Returns a description of the schema.
@@ -147,7 +147,7 @@
 
   static BaseType _baseTypeFromString(String typeName) {
     if (!_jsonToType.containsKey(typeName)) {
-      throw new ArgumentError('Unknown type.');
+      throw ArgumentError('Unknown type.');
     }
     return _jsonToType[typeName];
   }
diff --git a/public/dart/sledge/lib/src/schema/types/map_type.dart b/public/dart/sledge/lib/src/schema/types/map_type.dart
index 95b070d..90917e3 100644
--- a/public/dart/sledge/lib/src/schema/types/map_type.dart
+++ b/public/dart/sledge/lib/src/schema/types/map_type.dart
@@ -17,5 +17,5 @@
 
   @override
   Value newValue(ConnectionId connectionId) =>
-      new MapValue<String, Uint8List>();
+      MapValue<String, Uint8List>();
 }
diff --git a/public/dart/sledge/lib/src/schema/types/ordered_list_type.dart b/public/dart/sledge/lib/src/schema/types/ordered_list_type.dart
index 9ae68ce..2c2e67a 100644
--- a/public/dart/sledge/lib/src/schema/types/ordered_list_type.dart
+++ b/public/dart/sledge/lib/src/schema/types/ordered_list_type.dart
@@ -13,13 +13,13 @@
 
 /// The Sledge type for Ordered Set of [Uint8List].
 class OrderedList implements BaseType {
-  static const _listEquality = const ListEquality<int>();
+  static const _listEquality = ListEquality<int>();
 
   @override
   String toJson() => 'OrderedList';
 
   @override
   Value newValue(ConnectionId connectionId) =>
-      new OrderedListValue<Uint8List>(connectionId.id,
+      OrderedListValue<Uint8List>(connectionId.id,
           equals: _listEquality.equals);
 }
diff --git a/public/dart/sledge/lib/src/schema/types/pos_neg_counter_type.dart b/public/dart/sledge/lib/src/schema/types/pos_neg_counter_type.dart
index 6571623..e0d5729 100644
--- a/public/dart/sledge/lib/src/schema/types/pos_neg_counter_type.dart
+++ b/public/dart/sledge/lib/src/schema/types/pos_neg_counter_type.dart
@@ -14,7 +14,7 @@
 
   @override
   Value newValue(ConnectionId connectionId) =>
-      new PosNegCounterValue<int>(connectionId.id);
+      PosNegCounterValue<int>(connectionId.id);
 }
 
 /// The Sledge type for positive-negative counter
@@ -24,5 +24,5 @@
 
   @override
   Value newValue(ConnectionId connectionId) =>
-      new PosNegCounterValue<double>(connectionId.id);
+      PosNegCounterValue<double>(connectionId.id);
 }
diff --git a/public/dart/sledge/lib/src/schema/types/set_type.dart b/public/dart/sledge/lib/src/schema/types/set_type.dart
index 9f51a86..6acd1fc 100644
--- a/public/dart/sledge/lib/src/schema/types/set_type.dart
+++ b/public/dart/sledge/lib/src/schema/types/set_type.dart
@@ -14,12 +14,12 @@
 /// The Sledge type for Set of [Uint8List].
 /// Last One Wins strategy is applied for conflict resolution per entry.
 class BytelistSet implements BaseType {
-  static const _listEquality = const ListEquality<int>();
+  static const _listEquality = ListEquality<int>();
 
   @override
   String toJson() => 'BytelistSet';
 
   @override
-  Value newValue(ConnectionId connectionId) => new SetValue<Uint8List>(
+  Value newValue(ConnectionId connectionId) => SetValue<Uint8List>(
       equals: _listEquality.equals, hashCode: _listEquality.hash);
 }
diff --git a/public/dart/sledge/lib/src/schema/types/trivial_types.dart b/public/dart/sledge/lib/src/schema/types/trivial_types.dart
index e771090..7212931 100644
--- a/public/dart/sledge/lib/src/schema/types/trivial_types.dart
+++ b/public/dart/sledge/lib/src/schema/types/trivial_types.dart
@@ -15,7 +15,7 @@
   String toJson() => 'Boolean';
 
   @override
-  Value newValue(ConnectionId connectionId) => new LastOneWinsValue<bool>();
+  Value newValue(ConnectionId connectionId) => LastOneWinsValue<bool>();
 }
 
 /// The Sledge type to store integers.
@@ -24,7 +24,7 @@
   String toJson() => 'Integer';
 
   @override
-  Value newValue(ConnectionId connectionId) => new LastOneWinsValue<int>();
+  Value newValue(ConnectionId connectionId) => LastOneWinsValue<int>();
 }
 
 /// The Sledge type to store doubles.
@@ -33,7 +33,7 @@
   String toJson() => 'Double';
 
   @override
-  Value newValue(ConnectionId connectionId) => new LastOneWinsValue<double>();
+  Value newValue(ConnectionId connectionId) => LastOneWinsValue<double>();
 }
 
 /// The Sledge type to store strings with LWW merging strategy.
@@ -42,7 +42,7 @@
   String toJson() => 'LastOneWinsString';
 
   @override
-  Value newValue(ConnectionId connectionId) => new LastOneWinsValue<String>();
+  Value newValue(ConnectionId connectionId) => LastOneWinsValue<String>();
 }
 
 /// The Sledge type to store byte data with LWW merging strategy.
@@ -52,5 +52,5 @@
 
   @override
   Value newValue(ConnectionId connectionId) =>
-      new LastOneWinsValue<Uint8List>();
+      LastOneWinsValue<Uint8List>();
 }
diff --git a/public/dart/sledge/lib/src/sledge.dart b/public/dart/sledge/lib/src/sledge.dart
index ac41193..8d3c40e 100644
--- a/public/dart/sledge/lib/src/sledge.dart
+++ b/public/dart/sledge/lib/src/sledge.dart
@@ -29,9 +29,9 @@
 
 /// The interface to the Sledge library.
 class Sledge {
-  final ledger.LedgerProxy _ledgerProxy = new ledger.LedgerProxy();
+  final ledger.LedgerProxy _ledgerProxy = ledger.LedgerProxy();
   final ledger.PageProxy _pageProxy;
-  final ConnectionId _connectionId = new ConnectionId.random();
+  final ConnectionId _connectionId = ConnectionId.random();
 
   // Cache to get document by documentId.prefix.
   final Map<Uint8List, Future<Document>> _documentByPrefix =
@@ -46,17 +46,17 @@
 
   /// Default constructor.
   factory Sledge(ComponentContext componentContext, [SledgePageId pageId]) {
-    fidl.InterfacePair<ledger.Ledger> ledgerPair = new fidl.InterfacePair();
+    fidl.InterfacePair<ledger.Ledger> ledgerPair = fidl.InterfacePair();
     componentContext.getLedger(ledgerPair.passRequest());
-    return new Sledge._(ledgerPair.passHandle(), pageId);
+    return Sledge._(ledgerPair.passHandle(), pageId);
   }
 
   /// Internal constructor
   Sledge._(fidl.InterfaceHandle<ledger.Ledger> ledgerHandle,
       [SledgePageId pageId])
-      : _pageProxy = new ledger.PageProxy(),
-        _ledgerObjectsFactory = new LedgerObjectsFactoryImpl() {
-    pageId ??= new SledgePageId();
+      : _pageProxy = ledger.PageProxy(),
+        _ledgerObjectsFactory = LedgerObjectsFactoryImpl() {
+    pageId ??= SledgePageId();
 
     // The initialization sequence consists of:
     // 1/ Obtaining a LedgerProxy from the LedgerHandle.
@@ -72,30 +72,30 @@
 
     _ledgerProxy.getPage(pageId.id, _pageProxy.ctrl.request());
     _modificationQueue =
-        new ModificationQueue(this, _ledgerObjectsFactory, _pageProxy);
+        ModificationQueue(this, _ledgerObjectsFactory, _pageProxy);
     _subscribtion = _subscribe();
   }
 
   /// Constructor that takes a new-style binding of ComponentContext
   factory Sledge.forAsync(modular_async.ComponentContext componentContext,
       [SledgePageId pageId]) {
-    final pair = new ChannelPair();
-    componentContext.getLedger(new fidl.InterfaceRequest(pair.first));
-    return new Sledge._(new fidl.InterfaceHandle(pair.second), pageId);
+    final pair = ChannelPair();
+    componentContext.getLedger(fidl.InterfaceRequest(pair.first));
+    return Sledge._(fidl.InterfaceHandle(pair.second), pageId);
   }
 
   /// Convenience factory for modules.
   factory Sledge.fromModule(final ModuleContext moduleContext,
       [SledgePageId pageId]) {
-    ComponentContextProxy componentContextProxy = new ComponentContextProxy();
+    ComponentContextProxy componentContextProxy = ComponentContextProxy();
     moduleContext.getComponentContext(componentContextProxy.ctrl.request());
-    return new Sledge(componentContextProxy, pageId);
+    return Sledge(componentContextProxy, pageId);
   }
 
   /// Convenience constructor for tests.
   Sledge.testing(this._pageProxy, this._ledgerObjectsFactory) {
     _modificationQueue =
-        new ModificationQueue(this, _ledgerObjectsFactory, _pageProxy);
+        ModificationQueue(this, _ledgerObjectsFactory, _pageProxy);
     _subscribtion = _subscribe();
   }
 
@@ -123,7 +123,7 @@
   /// Execution of the transaction does not continue past this point.
   void abortAndRollback() {
     if (currentTransaction == null) {
-      throw new StateError('No transaction started.');
+      throw StateError('No transaction started.');
     }
     currentTransaction.abortAndRollback();
   }
@@ -179,7 +179,7 @@
     // Select the changes that concern documents.
     final documentChange = splittedChange[sledge_storage
             .prefixForType(sledge_storage.KeyValueType.document)] ??
-        new Change();
+        Change();
     // Split the changes according to the document they belong to.
     final splittedDocumentChange =
         documentChange.splitByPrefix(DocumentId.prefixLength);
@@ -195,12 +195,12 @@
   Subscription _subscribe() {
     assert(_modificationQueue.currentTransaction == null,
         '`_subscribe` must be called before any transaction can start.');
-    return new Subscription(_pageProxy, _ledgerObjectsFactory, _applyChange);
+    return Subscription(_pageProxy, _ledgerObjectsFactory, _applyChange);
   }
 
   void _verifyThatTransactionHasStarted() {
     if (currentTransaction == null) {
-      throw new StateError('No transaction started.');
+      throw StateError('No transaction started.');
     }
   }
 }
diff --git a/public/dart/sledge/lib/src/sledge_page_id.dart b/public/dart/sledge/lib/src/sledge_page_id.dart
index 5379397..6a3325b 100644
--- a/public/dart/sledge/lib/src/sledge_page_id.dart
+++ b/public/dart/sledge/lib/src/sledge_page_id.dart
@@ -24,14 +24,14 @@
   SledgePageId([String pageName = '']) {
     pageName ??= '';
 
-    final Uint8List hashedPageName = hash(new Utf8Encoder().convert(pageName));
+    final Uint8List hashedPageName = hash(Utf8Encoder().convert(pageName));
 
     final encodedPageName = concatUint8Lists(prefix, hashedPageName);
 
     final trimmedEncodedPageName = encodedPageName.sublist(0, 16);
     assert(trimmedEncodedPageName.length == 16);
 
-    _id = new ledger.PageId(id: trimmedEncodedPageName);
+    _id = ledger.PageId(id: trimmedEncodedPageName);
   }
 
   /// The Ledger's PageId.
@@ -48,6 +48,6 @@
   /// version of Sledge.
   static bool pageIsManagedBySledge(ledger.PageId pageId) {
     final pageIdPrefix = getSublistView(pageId.id, end: prefix.length);
-    return new ListEquality<int>().equals(pageIdPrefix, prefix);
+    return ListEquality<int>().equals(pageIdPrefix, prefix);
   }
 }
diff --git a/public/dart/sledge/lib/src/storage/kv_encoding.dart b/public/dart/sledge/lib/src/storage/kv_encoding.dart
index 358273a..84199df 100644
--- a/public/dart/sledge/lib/src/storage/kv_encoding.dart
+++ b/public/dart/sledge/lib/src/storage/kv_encoding.dart
@@ -34,7 +34,7 @@
 /// Returns the prefix for the KV storing in Ledger items of type [type].
 Uint8List prefixForType(KeyValueType type) {
   assert(type.index >= 0 && type.index <= 255);
-  return new Uint8List.fromList([type.index]);
+  return Uint8List.fromList([type.index]);
 }
 
 /// Returns the document subId stored in `key`.
diff --git a/public/dart/sledge/lib/src/subscription/subscription.dart b/public/dart/sledge/lib/src/subscription/subscription.dart
index fd6594e..7f929bd 100644
--- a/public/dart/sledge/lib/src/subscription/subscription.dart
+++ b/public/dart/sledge/lib/src/subscription/subscription.dart
@@ -16,7 +16,7 @@
   final ledger.PageSnapshotProxy _snapshotProxy;
   final ledger.PageWatcherBinding _pageWatcherBinding;
   final void Function(Change change) _applyChangeCallback;
-  final Change _currentChange = new Change();
+  final Change _currentChange = Change();
 
   /// Register a watcher for Ledger page, which pass all changes to
   /// _applyChangeCallback.
@@ -26,7 +26,7 @@
         _pageWatcherBinding = ledgerObjectsFactory.newPageWatcherBinding() {
     _pageProxy.getSnapshotNew(
       _snapshotProxy.ctrl.request(),
-      new Uint8List(0),
+      Uint8List(0),
       _pageWatcherBinding.wrap(this),
     );
   }
diff --git a/public/dart/sledge/lib/src/transaction.dart b/public/dart/sledge/lib/src/transaction.dart
index ed91cfd..576eaf8 100644
--- a/public/dart/sledge/lib/src/transaction.dart
+++ b/public/dart/sledge/lib/src/transaction.dart
@@ -47,7 +47,7 @@
       // All the read operations in |modification| will read from that snapshot.
       ..getSnapshotNew(
         _pageSnapshotProxy.ctrl.request(),
-        new Uint8List(0),
+        Uint8List(0),
         null,
       );
 
@@ -105,7 +105,7 @@
   /// Returns the document identified with [documentId].
   /// If the document does not exist, a new document is returned.
   Future<Document> getDocument(DocumentId documentId) async {
-    final document = new Document(_sledge, documentId);
+    final document = Document(_sledge, documentId);
     Uint8List keyPrefix = concatUint8Lists(
         sledge_storage.prefixForType(sledge_storage.KeyValueType.document),
         documentId.prefix);
@@ -114,14 +114,14 @@
 
     // Strip the document prefix from the KVs.
     for (int i = 0; i < kvs.length; i++) {
-      kvs[i] = new KeyValue(
+      kvs[i] = KeyValue(
           getSublistView(kvs[i].key,
               start: DocumentId.prefixLength + sledge_storage.typePrefixLength),
           kvs[i].value);
     }
 
     if (kvs.isNotEmpty) {
-      final change = new Change(kvs);
+      final change = Change(kvs);
       document.applyChange(change);
     }
 
@@ -141,12 +141,12 @@
         List<KeyValue> keyValues = await getEntriesFromSnapshotWithPrefix(
             _pageSnapshotProxy, keyPrefix);
         for (KeyValue keyValue in keyValues) {
-          documentIds.add(new DocumentId(query.schema, keyValue.value));
+          documentIds.add(DocumentId(query.schema, keyValue.value));
         }
       } else {
         print('getDocumentIds called with missing index');
         List<DocumentId> documentIds =
-            await getDocumentIds(new Query(query.schema));
+            await getDocumentIds(Query(query.schema));
         final filteredDocumentIds = <DocumentId>[];
         for (final documentId in documentIds) {
           // TODO(LE-638): Avoid discarding the documents after reading them.
@@ -173,7 +173,7 @@
         final newDocumentSubId =
             sledge_storage.documentSubIdFromKey(keyValue.key);
         if (!uint8ListsAreEqual(currentDocumentSubId, newDocumentSubId)) {
-          documentIds.add(new DocumentId(query.schema, newDocumentSubId));
+          documentIds.add(DocumentId(query.schema, newDocumentSubId));
           currentDocumentSubId = newDocumentSubId;
         }
       }
diff --git a/public/dart/sledge/lib/src/uint8list_ops.dart b/public/dart/sledge/lib/src/uint8list_ops.dart
index 4b439b0..ba30645 100644
--- a/public/dart/sledge/lib/src/uint8list_ops.dart
+++ b/public/dart/sledge/lib/src/uint8list_ops.dart
@@ -16,7 +16,7 @@
 
 /// Concatenate two byte arrays.
 Uint8List concatUint8Lists(Uint8List a, Uint8List b) {
-  return new Uint8List(a.length + b.length)..setAll(0, a)..setAll(a.length, b);
+  return Uint8List(a.length + b.length)..setAll(0, a)..setAll(a.length, b);
 }
 
 // TODO: consider using Iterable instead of List.
@@ -26,7 +26,7 @@
   for (final x in list) {
     sumLength += x.length;
   }
-  final result = new Uint8List(sumLength);
+  final result = Uint8List(sumLength);
   int pos = 0;
   for (final x in list) {
     result.setAll(pos, x);
@@ -39,27 +39,27 @@
 /// ending at [end] (exclusive).
 Uint8List getSublistView(Uint8List x, {int start = 0, int end}) {
   end ??= x.length;
-  return new UnmodifiableUint8ListView(
+  return UnmodifiableUint8ListView(
       x.buffer.asUint8List(x.offsetInBytes + start, end - start));
 }
 
 /// Returns a Uint8List created from the utf8 encoding of [string].
 /// [string] must be non-null.
 Uint8List getUint8ListFromString(String string) {
-  return new Uint8List.fromList(utf8.encode(string));
+  return Uint8List.fromList(utf8.encode(string));
 }
 
 /// Returns a Uint8List created from the binary encoding of [number].
 Uint8List getUint8ListFromNumber(num number) {
-  IntConverter converter = new IntConverter();
+  IntConverter converter = IntConverter();
   return converter.serialize(number);
 }
 
 /// Returns a new HashMap with Uint8Lists as a keys.
 /// Note: The type T is enforced only at compile time.
 HashMap<Uint8List, T> newUint8ListMap<T>() {
-  const listEquality = const ListEquality<int>();
-  return new HashMap<Uint8List, T>(
+  const listEquality = ListEquality<int>();
+  return HashMap<Uint8List, T>(
       equals: listEquality.equals, hashCode: listEquality.hash);
 }
 
@@ -69,7 +69,7 @@
   if (a == b) {
     return true;
   }
-  const listEquality = const ListEquality<int>();
+  const listEquality = ListEquality<int>();
   return listEquality.equals(a, b);
 }
 
@@ -91,20 +91,20 @@
 /// Returns a new ordered HashMap with Uint8Lists as a keys.
 /// Note: The type T is enforced only at compile time.
 SplayTreeMap<Uint8List, T> newUint8ListOrderedMap<T>() {
-  return new SplayTreeMap<Uint8List, T>(_compareLists);
+  return SplayTreeMap<Uint8List, T>(_compareLists);
 }
 
 /// Returns a 20 bytes long hash of [data].
 Uint8List hash(Uint8List data) {
   final iterable = sha256.convert(data).bytes.getRange(0, 20);
-  return new Uint8List.fromList(new List.from(iterable));
+  return Uint8List.fromList(List.from(iterable));
 }
 
-final _random = new Random.secure();
+final _random = Random.secure();
 
 /// Returns a list of random bytes of a given [length].
 Uint8List randomUint8List(int length) {
-  final result = new Uint8List(length);
+  final result = Uint8List(length);
   for (int i = 0; i < length; i++) {
     result[i] = _random.nextInt(256);
   }
diff --git a/public/dart/sledge/test/crdt_test_framework/computational_graph.dart b/public/dart/sledge/test/crdt_test_framework/computational_graph.dart
index e8dddca..df0d882 100644
--- a/public/dart/sledge/test/crdt_test_framework/computational_graph.dart
+++ b/public/dart/sledge/test/crdt_test_framework/computational_graph.dart
@@ -16,7 +16,7 @@
 class ComputationalGraph {
   final List<Node> nodes = <Node>[];
   final List<List<int>> _allChoices = <List<int>>[];
-  final Random random = new Random(0);
+  final Random random = Random(0);
 
   void addNode(Node v) {
     // TODO: remove O(n) part.
@@ -64,7 +64,7 @@
     _allChoices.clear();
     List<int> choices = <int>[];
     while (_moveNextChoiceList(choices)) {
-      _allChoices.add(new List<int>.from(choices));
+      _allChoices.add(List<int>.from(choices));
     }
     return _allChoices.length;
   }
@@ -98,7 +98,7 @@
     Map<Node, int> known = <Node, int>{};
     for (int i = 0; i < nodes.length; i++) {
       if (ready.isEmpty) {
-        throw new StateError('Computational graph should be acyclic.');
+        throw StateError('Computational graph should be acyclic.');
       }
       int curChoice = 0;
       if (i < choices.length) {
@@ -124,12 +124,12 @@
         }
       }
     }
-    return new EvaluationOrder(order);
+    return EvaluationOrder(order);
   }
 
   EvaluationOrder _getNthOrder(int index) {
     if (index < 0 || index >= _allChoices.length) {
-      throw new ArgumentError.value(index, 'index', 'Index is out of range.');
+      throw ArgumentError.value(index, 'index', 'Index is out of range.');
     }
     return _getOrder(_allChoices[index]);
   }
@@ -139,5 +139,5 @@
 
   // Returns all correct topological orders of this graph.
   Iterable<EvaluationOrder> get orders =>
-      new Iterable<EvaluationOrder>.generate(_countOrders(), _getNthOrder);
+      Iterable<EvaluationOrder>.generate(_countOrders(), _getNthOrder);
 }
diff --git a/public/dart/sledge/test/crdt_test_framework/evaluation_order.dart b/public/dart/sledge/test/crdt_test_framework/evaluation_order.dart
index 7279811..888e9ee 100644
--- a/public/dart/sledge/test/crdt_test_framework/evaluation_order.dart
+++ b/public/dart/sledge/test/crdt_test_framework/evaluation_order.dart
@@ -19,18 +19,18 @@
   EvaluationOrder.fromIds(Iterable<String> ids, Iterable<Node> graphNodes,
       {bool allowPartial = false, allowGenerated = false})
       : nodes = <Node>[] {
-    final idToNode = new Map<String, Node>.fromIterable(graphNodes,
+    final idToNode = Map<String, Node>.fromIterable(graphNodes,
         key: (node) => node.nodeId);
 
     final setIds = ids.toSet();
     if (setIds.length != ids.length) {
-      throw new ArgumentError('Elements of ids ($ids) must be unique.');
+      throw ArgumentError('Elements of ids ($ids) must be unique.');
     }
 
     if (!allowPartial) {
       for (final node in graphNodes) {
         if (!setIds.contains(node.nodeId)) {
-          throw new ArgumentError(
+          throw ArgumentError(
               'ids ($ids) must contain all nodes from `$graphNodes`.');
         }
       }
@@ -40,7 +40,7 @@
       Node node = idToNode[id];
       if (node == null) {
         if (!allowGenerated || !id.startsWith('g-')) {
-          throw new ArgumentError(
+          throw ArgumentError(
               '`$id` is not an id of a node from `$graphNodes`.');
         }
         // Can throw FormatException
@@ -49,7 +49,7 @@
         int secondDash = id.indexOf('-', underscore + 1);
         int id1 = int.parse(id.substring(firstDash + 1, underscore));
         int id2 = int.parse(id.substring(underscore + 1, secondDash));
-        node = new SynchronizationNode.generated(
+        node = SynchronizationNode.generated(
             id.substring(secondDash + 1), id1, id2);
       }
       nodes.add(node);
@@ -58,7 +58,7 @@
 
   @override
   String toString() {
-    StringBuffer nodesString = new StringBuffer()
+    StringBuffer nodesString = StringBuffer()
       ..writeAll(nodes.map((node) => "'$node'"), ', ');
     return '[$nodesString]';
   }
diff --git a/public/dart/sledge/test/crdt_test_framework/fleet.dart b/public/dart/sledge/test/crdt_test_framework/fleet.dart
index ff62518..581a33f 100644
--- a/public/dart/sledge/test/crdt_test_framework/fleet.dart
+++ b/public/dart/sledge/test/crdt_test_framework/fleet.dart
@@ -40,16 +40,16 @@
 class Fleet<T extends dynamic> {
   int _fleetSize;
   List<Node> _lastModifications;
-  final Node _initialModification = new Node('init');
-  final ComputationalGraph graph = new ComputationalGraph();
+  final Node _initialModification = Node('init');
+  final ComputationalGraph graph = ComputationalGraph();
   final T Function(int) _instanceGenerator;
   final List<CheckerGenerator<T>> _checkerGenerators = <CheckerGenerator<T>>[];
   double _expectedSyncsPerAction = 0.0;
-  final Random random = new Random(1);
+  final Random random = Random(1);
 
   Fleet(this._fleetSize, this._instanceGenerator) {
     _lastModifications =
-        new List<Node>.filled(_fleetSize, _initialModification);
+        List<Node>.filled(_fleetSize, _initialModification);
     graph.addNode(_initialModification);
   }
 
@@ -73,7 +73,7 @@
     }
     final list = <int>[]..addAll(group)..addAll(group.reversed.skip(2));
     for (int i = 0; i < list.length - 1; i++) {
-      Node node = new SynchronizationNode(
+      Node node = SynchronizationNode(
           '${list[i]}_${list[i + 1]}-n${graph.nodes.length}',
           list[i],
           list[i + 1]);
@@ -84,7 +84,7 @@
 
   void runInTransaction(int id, Future Function(T) modification) {
     final node =
-        new ModificationNode<T>('$id-n${graph.nodes.length}', id, modification);
+        ModificationNode<T>('$id-n${graph.nodes.length}', id, modification);
     _addNode(node, id);
   }
 
@@ -99,7 +99,7 @@
   /// [expectedSyncsPerAction].
   void setRandomSynchronizationsRate(double expectedSyncsPerAction) {
     if (expectedSyncsPerAction < 0) {
-      throw new ArgumentError(
+      throw ArgumentError(
           'Number of synchronizations must be greater or equal to 0. Got $expectedSyncsPerAction.');
     }
     _expectedSyncsPerAction = expectedSyncsPerAction;
@@ -111,7 +111,7 @@
   Future testSingleOrder(
       {EvaluationOrder order, bool enableRandomSyncronization = true}) async {
     order ??= graph.orders.first;
-    final fleetState = new FleetState<T>(_fleetSize, _instanceGenerator);
+    final fleetState = FleetState<T>(_fleetSize, _instanceGenerator);
     for (final newChecker in _checkerGenerators) {
       fleetState.addChecker(newChecker());
     }
@@ -122,7 +122,7 @@
     if (enableRandomSyncronization &&
         _fleetSize > 1 &&
         _expectedSyncsPerAction > 0) {
-      completedOrder = new EvaluationOrder([]);
+      completedOrder = EvaluationOrder([]);
       for (final node in order.nodes) {
         completedOrder.nodes.add(node);
         // Geometric distribution (the probability distribution of the number Y
@@ -141,7 +141,7 @@
           if (instanceId2 >= instanceId1) {
             instanceId2++;
           }
-          completedOrder.nodes.add(new SynchronizationNode.generated(
+          completedOrder.nodes.add(SynchronizationNode.generated(
               '${completedOrder.nodes.length}', instanceId1, instanceId2));
         }
       }
@@ -152,7 +152,7 @@
         await fleetState.applyNode(completedOrder.nodes[i], i);
       } on TestFailure catch (failure) {
         // ignore: only_throw_errors
-        throw new SingleOrderTestFailure(
+        throw SingleOrderTestFailure(
             failure, completedOrder, completedOrder.nodes[i]);
       }
     }
@@ -169,7 +169,7 @@
   Future testFixedOrder(Iterable<String> nodeIds,
       {bool allowPartial = false, bool allowGenerated = true}) async {
     await testSingleOrder(
-        order: new EvaluationOrder.fromIds(nodeIds, graph.nodes,
+        order: EvaluationOrder.fromIds(nodeIds, graph.nodes,
             allowPartial: allowPartial, allowGenerated: allowGenerated),
         enableRandomSyncronization: false);
   }
diff --git a/public/dart/sledge/test/crdt_test_framework/fleet_state.dart b/public/dart/sledge/test/crdt_test_framework/fleet_state.dart
index 83ad580..8643956 100644
--- a/public/dart/sledge/test/crdt_test_framework/fleet_state.dart
+++ b/public/dart/sledge/test/crdt_test_framework/fleet_state.dart
@@ -24,19 +24,19 @@
 
   FleetState(int size, T instanceGenerator(int index))
       : _fleetSize = size,
-        _storageStates = new List<StorageState>.generate(
-            size, (index) => new StorageState(),
+        _storageStates = List<StorageState>.generate(
+            size, (index) => StorageState(),
             growable: false),
         _instances =
-            new List<T>.generate(size, instanceGenerator, growable: false) {
+            List<T>.generate(size, instanceGenerator, growable: false) {
     for (int i = 0; i < size; i++) {
       if (T == Sledge) {
         _storageStates[i] = _instances[i].fakeLedgerPage.storageState;
       } else if (T == Document) {
-        _storageStates[i] = new StorageState(
+        _storageStates[i] = StorageState(
             (change) => _instances.cast<Document>()[i].applyChange(change));
       } else {
-        _storageStates[i] = new StorageState(_instances[i].applyChange);
+        _storageStates[i] = StorageState(_instances[i].applyChange);
       }
     }
   }
diff --git a/public/dart/sledge/test/crdt_test_framework/node.dart b/public/dart/sledge/test/crdt_test_framework/node.dart
index 0d9f9b9..1acd883 100644
--- a/public/dart/sledge/test/crdt_test_framework/node.dart
+++ b/public/dart/sledge/test/crdt_test_framework/node.dart
@@ -17,10 +17,10 @@
   /// already contains type prefix.
   Node._internal(this.nodeId) {
     if (nodeId.contains("'")) {
-      throw new ArgumentError("[nodeId] should not contain character <'>.");
+      throw ArgumentError("[nodeId] should not contain character <'>.");
     }
     if (nodeId.startsWith(r'[\w]+-')) {
-      throw new ArgumentError('[nodeId] should start with the type prefix.');
+      throw ArgumentError('[nodeId] should start with the type prefix.');
     }
   }
 
diff --git a/public/dart/sledge/test/crdt_test_framework/storage_state.dart b/public/dart/sledge/test/crdt_test_framework/storage_state.dart
index 36c1f47..ecac39f 100644
--- a/public/dart/sledge/test/crdt_test_framework/storage_state.dart
+++ b/public/dart/sledge/test/crdt_test_framework/storage_state.dart
@@ -29,10 +29,10 @@
 
     timestamp ??= globalIncrementalTimer++;
     for (final entry in change.changedEntries) {
-      _storage[entry.key] = new Entry(entry.value, timestamp);
+      _storage[entry.key] = Entry(entry.value, timestamp);
     }
     for (final key in change.deletedKeys) {
-      _storage[key] = new Entry.deleted(timestamp);
+      _storage[key] = Entry.deleted(timestamp);
     }
     // TODO: check that changedEntries and deletedKeys do not intersect.
     _onChangeCallback?.call(change);
@@ -62,12 +62,12 @@
             _storage[entry.key] = entry.value;
           }
         } else {
-          changedEntries.add(new KeyValue(entry.key, entry.value.value));
+          changedEntries.add(KeyValue(entry.key, entry.value.value));
           _storage[entry.key] = other._storage[entry.key];
         }
       }
     }
-    final change = new Change(changedEntries, deletedKeys);
+    final change = Change(changedEntries, deletedKeys);
     if (change.changedEntries.isNotEmpty || change.deletedKeys.isNotEmpty) {
       _onChangeCallback?.call(change);
     }
@@ -79,7 +79,7 @@
     for (final key in _storage.keys) {
       Entry value = _storage[key];
       if (!value.isDeleted && hasPrefix(key, keyPrefix)) {
-        entries.add(new KeyValue(key, value.value));
+        entries.add(KeyValue(key, value.value));
       }
     }
     return entries;
diff --git a/public/dart/sledge/test/crdt_test_framework_test/checker_test.dart b/public/dart/sledge/test/crdt_test_framework_test/checker_test.dart
index b341cf9..0951fd8 100644
--- a/public/dart/sledge/test/crdt_test_framework_test/checker_test.dart
+++ b/public/dart/sledge/test/crdt_test_framework_test/checker_test.dart
@@ -15,13 +15,13 @@
   const LastOneWinsFleetFactory();
 
   Fleet<LastOneWinsValue<T>> newFleet(int count) {
-    return new Fleet<LastOneWinsValue<T>>(
-        count, (index) => new LastOneWinsValue<T>());
+    return Fleet<LastOneWinsValue<T>>(
+        count, (index) => LastOneWinsValue<T>());
   }
 }
 
 const LastOneWinsFleetFactory<bool> boolLastOneWinsFleetFactory =
-    const LastOneWinsFleetFactory<bool>();
+    LastOneWinsFleetFactory<bool>();
 
 class FalseChecker extends Checker<LastOneWinsValue<bool>> {
   @override
@@ -42,7 +42,7 @@
         b.value = false;
       })
       ..synchronize([0, 1])
-      ..addChecker(() => new FalseChecker());
+      ..addChecker(() => FalseChecker());
     await fleet.testAllOrders();
   });
 
@@ -51,7 +51,7 @@
       ..runInTransaction(0, (LastOneWinsValue<bool> b) async {
         b.value = true;
       })
-      ..addChecker(() => new FalseChecker());
-    expect(fleet.testAllOrders(), throwsA(new TypeMatcher<TestFailure>()));
+      ..addChecker(() => FalseChecker());
+    expect(fleet.testAllOrders(), throwsA(TypeMatcher<TestFailure>()));
   });
 }
diff --git a/public/dart/sledge/test/crdt_test_framework_test/computational_graph_test.dart b/public/dart/sledge/test/crdt_test_framework_test/computational_graph_test.dart
index 0ba1c59..ebfb766 100644
--- a/public/dart/sledge/test/crdt_test_framework_test/computational_graph_test.dart
+++ b/public/dart/sledge/test/crdt_test_framework_test/computational_graph_test.dart
@@ -14,11 +14,11 @@
   setupLogger();
 
   test('Build and get orders.', () {
-    ComputationalGraph G = new ComputationalGraph();
-    final n1 = new Node('1');
-    final n2 = new Node('2');
-    final n3 = new Node('3');
-    final n4 = new Node('4');
+    ComputationalGraph G = ComputationalGraph();
+    final n1 = Node('1');
+    final n2 = Node('2');
+    final n3 = Node('3');
+    final n4 = Node('4');
     G
       ..addNode(n1)
       ..addNode(n2)
@@ -32,16 +32,16 @@
     expect(
         orders,
         unorderedEquals([
-          new EvaluationOrder([n1, n2, n3, n4]),
-          new EvaluationOrder([n1, n2, n4, n3])
+          EvaluationOrder([n1, n2, n3, n4]),
+          EvaluationOrder([n1, n2, n4, n3])
         ]));
   });
 
   test('Build and get orders not connected.', () {
-    ComputationalGraph G = new ComputationalGraph();
-    final n1 = new Node('1');
-    final n2 = new Node('2');
-    final n3 = new Node('3');
+    ComputationalGraph G = ComputationalGraph();
+    final n1 = Node('1');
+    final n2 = Node('2');
+    final n3 = Node('3');
     G
       ..addNode(n1)
       ..addNode(n2)
@@ -52,19 +52,19 @@
     expect(
         orders,
         unorderedEquals([
-          new EvaluationOrder([n1, n2, n3]),
-          new EvaluationOrder([n2, n1, n3]),
-          new EvaluationOrder([n2, n3, n1])
+          EvaluationOrder([n1, n2, n3]),
+          EvaluationOrder([n2, n1, n3]),
+          EvaluationOrder([n2, n3, n1])
         ]));
   });
 
   test('Build and get orders.', () {
-    ComputationalGraph G = new ComputationalGraph();
-    final n1 = new Node('1');
-    final n2 = new Node('2');
-    final n3 = new Node('3');
-    final n4 = new Node('4');
-    final n5 = new Node('5');
+    ComputationalGraph G = ComputationalGraph();
+    final n1 = Node('1');
+    final n2 = Node('2');
+    final n3 = Node('3');
+    final n4 = Node('4');
+    final n5 = Node('5');
     G
       ..addNode(n1)
       ..addNode(n2)
@@ -81,17 +81,17 @@
     expect(
         orders,
         unorderedEquals([
-          new EvaluationOrder([n1, n2, n3, n4, n5]),
-          new EvaluationOrder([n1, n2, n4, n3, n5]),
-          new EvaluationOrder([n1, n4, n2, n3, n5])
+          EvaluationOrder([n1, n2, n3, n4, n5]),
+          EvaluationOrder([n1, n2, n4, n3, n5]),
+          EvaluationOrder([n1, n4, n2, n3, n5])
         ]));
   });
 
   test('Build and get orders, cyclic graph.', () {
-    ComputationalGraph G = new ComputationalGraph();
-    final n1 = new Node('1');
-    final n2 = new Node('2');
-    final n3 = new Node('3');
+    ComputationalGraph G = ComputationalGraph();
+    final n1 = Node('1');
+    final n2 = Node('2');
+    final n3 = Node('3');
     G
       ..addNode(n1)
       ..addNode(n2)
@@ -104,9 +104,9 @@
   });
 
   test('Check that random orders differs.', () {
-    ComputationalGraph G = new ComputationalGraph();
-    final n1 = new Node('1');
-    final n2 = new Node('2');
+    ComputationalGraph G = ComputationalGraph();
+    final n1 = Node('1');
+    final n2 = Node('2');
     G..addNode(n1)..addNode(n2);
     final orders = <EvaluationOrder>[];
     for (int i = 0; i < 31; i++) {
@@ -117,18 +117,18 @@
     expect(
         orders,
         containsAll([
-          new EvaluationOrder([n1, n2]),
-          new EvaluationOrder([n2, n1])
+          EvaluationOrder([n1, n2]),
+          EvaluationOrder([n2, n1])
         ]));
   });
 
   test('Check getRandomOrder in linear graph.', () {
-    ComputationalGraph G = new ComputationalGraph();
-    final n1 = new Node('1');
-    final n2 = new Node('2');
-    final n3 = new Node('3');
-    final n4 = new Node('4');
-    final n5 = new Node('5');
+    ComputationalGraph G = ComputationalGraph();
+    final n1 = Node('1');
+    final n2 = Node('2');
+    final n3 = Node('3');
+    final n4 = Node('4');
+    final n5 = Node('5');
     G
       ..addNode(n1)
       ..addNode(n2)
@@ -141,6 +141,6 @@
       ..addRelation(n4, n5);
 
     final order = G.getRandomOrder();
-    expect(order, equals(new EvaluationOrder([n1, n2, n3, n4, n5])));
+    expect(order, equals(EvaluationOrder([n1, n2, n3, n4, n5])));
   });
 }
diff --git a/public/dart/sledge/test/crdt_test_framework_test/evaluation_order_test.dart b/public/dart/sledge/test/crdt_test_framework_test/evaluation_order_test.dart
index ec05059..8178f68 100644
--- a/public/dart/sledge/test/crdt_test_framework_test/evaluation_order_test.dart
+++ b/public/dart/sledge/test/crdt_test_framework_test/evaluation_order_test.dart
@@ -13,40 +13,40 @@
   setupLogger();
 
   test('EvaluationOrder operator ==', () {
-    final n1 = new Node('1');
-    final n2 = new Node('2');
-    final n3 = new Node('3');
-    expect(new EvaluationOrder([n1, n2, n3]),
-        equals(new EvaluationOrder([n1, n2, n3])));
-    expect(new EvaluationOrder([n1, n2, n3]),
-        isNot(equals(new EvaluationOrder([n2, n1, n3]))));
+    final n1 = Node('1');
+    final n2 = Node('2');
+    final n3 = Node('3');
+    expect(EvaluationOrder([n1, n2, n3]),
+        equals(EvaluationOrder([n1, n2, n3])));
+    expect(EvaluationOrder([n1, n2, n3]),
+        isNot(equals(EvaluationOrder([n2, n1, n3]))));
   });
 
-  final argumentErrorMatcher = throwsA(new TypeMatcher<ArgumentError>());
+  final argumentErrorMatcher = throwsA(TypeMatcher<ArgumentError>());
 
   test('Node restricted name', () {
-    expect(() => new Node("f'o'o"), argumentErrorMatcher);
+    expect(() => Node("f'o'o"), argumentErrorMatcher);
   });
 
   test('EvaluationOrder from list of ids', () {
-    final n1 = new Node('1');
-    final n2 = new Node('2');
-    final n3 = new Node('3');
+    final n1 = Node('1');
+    final n2 = Node('2');
+    final n3 = Node('3');
     final order132 =
-        new EvaluationOrder.fromIds(['n-1', 'n-3', 'n-2'], [n1, n2, n3]);
-    expect(order132, equals(new EvaluationOrder([n1, n3, n2])));
-    expect(() => new EvaluationOrder.fromIds(['n-1', 'n-2'], [n1, n2, n3]),
+        EvaluationOrder.fromIds(['n-1', 'n-3', 'n-2'], [n1, n2, n3]);
+    expect(order132, equals(EvaluationOrder([n1, n3, n2])));
+    expect(() => EvaluationOrder.fromIds(['n-1', 'n-2'], [n1, n2, n3]),
         argumentErrorMatcher);
     expect(
-        () => new EvaluationOrder.fromIds(
+        () => EvaluationOrder.fromIds(
             ['n-1', 'n-2', 'n-3', 'n-1'], [n1, n2, n3]),
         argumentErrorMatcher);
     expect(
-        () => new EvaluationOrder.fromIds(['n-1', 'n-2', 'n-1'], [n1, n2, n3]),
+        () => EvaluationOrder.fromIds(['n-1', 'n-2', 'n-1'], [n1, n2, n3]),
         argumentErrorMatcher);
     expect(
-        new EvaluationOrder.fromIds(['n-1', 'n-3'], [n1, n2, n3],
+        EvaluationOrder.fromIds(['n-1', 'n-3'], [n1, n2, n3],
             allowPartial: true),
-        equals(new EvaluationOrder([n1, n3])));
+        equals(EvaluationOrder([n1, n3])));
   });
 }
diff --git a/public/dart/sledge/test/crdt_test_framework_test/storage_state_test.dart b/public/dart/sledge/test/crdt_test_framework_test/storage_state_test.dart
index 352c06b..95e0126 100644
--- a/public/dart/sledge/test/crdt_test_framework_test/storage_state_test.dart
+++ b/public/dart/sledge/test/crdt_test_framework_test/storage_state_test.dart
@@ -18,7 +18,7 @@
   setupLogger();
 
   test('Empty storage state.', () async {
-    StorageState storage = new StorageState();
+    StorageState storage = StorageState();
     expect(storage.getEntries(getUint8ListFromString('')).length, equals(0));
     expect(storage.getEntries(getUint8ListFromString('AA')).length, equals(0));
   });
@@ -27,15 +27,15 @@
     final List<KeyValue> keyValues = <KeyValue>[];
     Uint8List unused = getUint8ListFromString('');
     keyValues
-      ..add(new KeyValue(getUint8ListFromString('AAB'), unused))
-      ..add(new KeyValue(getUint8ListFromString('Z'), unused))
-      ..add(new KeyValue(getUint8ListFromString('AABC'), unused))
-      ..add(new KeyValue(getUint8ListFromString('ZAA'), unused))
-      ..add(new KeyValue(getUint8ListFromString('AAA'), unused))
-      ..add(new KeyValue(getUint8ListFromString('ABAA'), unused));
+      ..add(KeyValue(getUint8ListFromString('AAB'), unused))
+      ..add(KeyValue(getUint8ListFromString('Z'), unused))
+      ..add(KeyValue(getUint8ListFromString('AABC'), unused))
+      ..add(KeyValue(getUint8ListFromString('ZAA'), unused))
+      ..add(KeyValue(getUint8ListFromString('AAA'), unused))
+      ..add(KeyValue(getUint8ListFromString('ABAA'), unused));
 
-    StorageState storage = new StorageState()
-      ..applyChange(new Change(keyValues));
+    StorageState storage = StorageState()
+      ..applyChange(Change(keyValues));
 
     final entries = storage.getEntries(getUint8ListFromString('AA'));
     expect(entries.length, equals(3));
diff --git a/public/dart/sledge/test/crdt_test_framework_test/thrown_error_test.dart b/public/dart/sledge/test/crdt_test_framework_test/thrown_error_test.dart
index 353b56c..84cf0c2 100644
--- a/public/dart/sledge/test/crdt_test_framework_test/thrown_error_test.dart
+++ b/public/dart/sledge/test/crdt_test_framework_test/thrown_error_test.dart
@@ -15,12 +15,12 @@
   const MapFleetFactory();
 
   Fleet<MapValue<K, V>> newFleet(int count) {
-    return new Fleet<MapValue<K, V>>(count, (index) => new MapValue<K, V>());
+    return Fleet<MapValue<K, V>>(count, (index) => MapValue<K, V>());
   }
 }
 
 const MapFleetFactory<int, int> intMapFleetFactory =
-    const MapFleetFactory<int, int>();
+    MapFleetFactory<int, int>();
 
 class ValuesAreUniqueChecker<K, V> extends Checker<MapValue<K, V>> {
   @override
@@ -46,7 +46,7 @@
         m1[2] = 2;
       })
       ..synchronize([0, 1])
-      ..addChecker(() => new ValuesAreUniqueChecker<int, int>());
+      ..addChecker(() => ValuesAreUniqueChecker<int, int>());
     try {
       await fleet.testAllOrders();
       // If SingleOrderTestFailure wasn't thrown, fail. Note that fail will
@@ -56,7 +56,7 @@
       final nodeIds = failure.order.nodes.map((node) => node.nodeId);
       // Check that the EvaluationOrder is correctly reproduced with the list of
       // nodeIds.
-      expect(new EvaluationOrder.fromIds(nodeIds, fleet.graph.nodes),
+      expect(EvaluationOrder.fromIds(nodeIds, fleet.graph.nodes),
           equals(failure.order));
 
       try {
@@ -84,7 +84,7 @@
         m0[2] = 4;
       })
       ..setRandomSynchronizationsRate(1.0)
-      ..addChecker(() => new ValuesAreUniqueChecker<int, int>());
+      ..addChecker(() => ValuesAreUniqueChecker<int, int>());
     try {
       // 1/2 probability of the correct order.
       // 1/2 probability of synchronization after the last modification.
@@ -100,7 +100,7 @@
       // Check that the EvaluationOrder is correctly reproduced with the list of
       // nodeIds.
       expect(
-          new EvaluationOrder.fromIds(nodeIds, fleet.graph.nodes,
+          EvaluationOrder.fromIds(nodeIds, fleet.graph.nodes,
               allowGenerated: true),
           equals(failure.order));
 
diff --git a/public/dart/sledge/test/document_deletion_test.dart b/public/dart/sledge/test/document_deletion_test.dart
index 40d2be4..f38b656 100644
--- a/public/dart/sledge/test/document_deletion_test.dart
+++ b/public/dart/sledge/test/document_deletion_test.dart
@@ -10,9 +10,9 @@
 
 Schema newSchema() {
   final schemaDescription = <String, BaseType>{
-    'a': new Integer(),
+    'a': Integer(),
   };
-  return new Schema(schemaDescription);
+  return Schema(schemaDescription);
 }
 
 void main() async {
@@ -20,7 +20,7 @@
 
   test('Test immediate deletions.', () async {
     Schema schema = newSchema();
-    final id = new DocumentId(schema);
+    final id = DocumentId(schema);
     Sledge sledge = newSledgeForTesting();
     Document doc;
     await sledge.runInTransaction(() async {
@@ -34,7 +34,7 @@
 
   test('Test deletions.', () async {
     Schema schema = newSchema();
-    final id = new DocumentId(schema);
+    final id = DocumentId(schema);
     Sledge sledge = newSledgeForTesting();
 
     // Create document.
@@ -44,14 +44,14 @@
     });
     // Verify that the document exists and delete it.
     await sledge.runInTransaction(() async {
-      final query = new Query(schema);
+      final query = Query(schema);
       final docs = await sledge.getDocuments(query);
       expect(docs.length, equals(1));
       docs[0].delete();
     });
     // Verify that document deos not exist anymore.
     await sledge.runInTransaction(() async {
-      final query = new Query(schema);
+      final query = Query(schema);
       final docs = await sledge.getDocuments(query);
       expect(docs.length, equals(0));
     });
@@ -59,7 +59,7 @@
 
   test('Test rollbacked deletions.', () async {
     Schema schema = newSchema();
-    final id = new DocumentId(schema);
+    final id = DocumentId(schema);
     Sledge sledge = newSledgeForTesting();
     Document doc;
     // Create document.
diff --git a/public/dart/sledge/test/document_id_test.dart b/public/dart/sledge/test/document_id_test.dart
index 6bc87dc..430ed5b 100644
--- a/public/dart/sledge/test/document_id_test.dart
+++ b/public/dart/sledge/test/document_id_test.dart
@@ -8,10 +8,10 @@
 
 Schema newSchema() {
   final schemaDescription = <String, BaseType>{
-    'a': new Integer(),
-    'b': new Integer()
+    'a': Integer(),
+    'b': Integer()
   };
-  return new Schema(schemaDescription);
+  return Schema(schemaDescription);
 }
 
 void main() {
@@ -19,22 +19,22 @@
 
   test('Verify that two unnamed DocumentId have different prefixes', () {
     Schema schema = newSchema();
-    final id1 = new DocumentId(schema);
-    final id2 = new DocumentId(schema);
+    final id1 = DocumentId(schema);
+    final id2 = DocumentId(schema);
     expect(id1.prefix, isNot(equals(id2.prefix)));
   });
 
   test('Verify that two identically named DocumentId have identical prefixes',
       () {
     Schema schema = newSchema();
-    final id1 = new DocumentId.fromIntId(schema, 42);
-    final id2 = new DocumentId.fromIntId(schema, 42);
+    final id1 = DocumentId.fromIntId(schema, 42);
+    final id2 = DocumentId.fromIntId(schema, 42);
     expect(id1.prefix, equals(id2.prefix));
   });
 
   test('Verify that an incorrect parameter results in an exception', () {
     Schema schema = newSchema();
     final list = <int>[];
-    expect(() => new DocumentId(schema, list), throwsA(anything));
+    expect(() => DocumentId(schema, list), throwsA(anything));
   });
 }
diff --git a/public/dart/sledge/test/document_ss_test.dart b/public/dart/sledge/test/document_ss_test.dart
index 00322c7..ab8a67d 100644
--- a/public/dart/sledge/test/document_ss_test.dart
+++ b/public/dart/sledge/test/document_ss_test.dart
@@ -16,7 +16,7 @@
   const DocumentFleetFactory(this._sledge, this._documentId);
 
   Fleet<Document> newFleet(int count) {
-    return new Fleet<Document>(
+    return Fleet<Document>(
         count, (index) => _sledge.fakeGetDocument(_documentId));
   }
 }
@@ -31,13 +31,13 @@
 void main() async {
   setupLogger();
 
-  final Schema nameLengthSchema = new Schema(<String, BaseType>{
-    'name': new LastOneWinsString(),
-    'length': new Integer()
+  final Schema nameLengthSchema = Schema(<String, BaseType>{
+    'name': LastOneWinsString(),
+    'length': Integer()
   });
-  final documentId = new DocumentId(nameLengthSchema);
+  final documentId = DocumentId(nameLengthSchema);
   final fakeSledge = newSledgeForTesting()..startInfiniteTransaction();
-  final documentFleetFactory = new DocumentFleetFactory(fakeSledge, documentId);
+  final documentFleetFactory = DocumentFleetFactory(fakeSledge, documentId);
 
   test('Document test with framework', () async {
     final fleet = documentFleetFactory.newFleet(3)
@@ -54,7 +54,7 @@
         doc['length'].value = 6;
       })
       ..synchronize([0, 1, 2])
-      ..addChecker(() => new NameLengthChecker());
+      ..addChecker(() => NameLengthChecker());
     await fleet.testAllOrders();
   });
 
diff --git a/public/dart/sledge/test/document_test.dart b/public/dart/sledge/test/document_test.dart
index 107348d..af4bc50 100644
--- a/public/dart/sledge/test/document_test.dart
+++ b/public/dart/sledge/test/document_test.dart
@@ -10,10 +10,10 @@
 
 Schema newSchema() {
   final schemaDescription = <String, BaseType>{
-    'a': new Integer(),
-    'b': new Integer()
+    'a': Integer(),
+    'b': Integer()
   };
-  return new Schema(schemaDescription);
+  return Schema(schemaDescription);
 }
 
 void main() async {
@@ -21,7 +21,7 @@
 
   test('Verify that document can be created.', () async {
     Schema schema = newSchema();
-    final id = new DocumentId(schema);
+    final id = DocumentId(schema);
     Sledge sledge = newSledgeForTesting();
     // ignore: unused_local_variable
     Document doc;
@@ -34,7 +34,7 @@
       'Verify that by same DocumentId we get the same document object.'
       '(different transactions)', () async {
     Schema schema = newSchema();
-    final id = new DocumentId(schema);
+    final id = DocumentId(schema);
     Sledge sledge = newSledgeForTesting();
     Document doc1, doc2;
     await sledge.runInTransaction(() async {
@@ -50,7 +50,7 @@
       'Verify that by same documentId we get the same document object.'
       '(same transaction)', () async {
     Schema schema = newSchema();
-    final id = new DocumentId(schema);
+    final id = DocumentId(schema);
     Sledge sledge = newSledgeForTesting();
     Document doc1, doc2;
     await sledge.runInTransaction(() async {
@@ -66,7 +66,7 @@
       'Verify that by different documentId we get different document objects.'
       '(different transactions)', () async {
     Schema schema = newSchema();
-    final id1 = new DocumentId(schema), id2 = new DocumentId(schema);
+    final id1 = DocumentId(schema), id2 = DocumentId(schema);
     Sledge sledge = newSledgeForTesting();
     Document doc1, doc2;
     await sledge.runInTransaction(() async {
@@ -82,7 +82,7 @@
       'Verify that by different documentId we get different document objects.'
       '(same transaction)', () async {
     Schema schema = newSchema();
-    final id1 = new DocumentId(schema), id2 = new DocumentId(schema);
+    final id1 = DocumentId(schema), id2 = DocumentId(schema);
     Sledge sledge = newSledgeForTesting();
     Document doc1, doc2;
     await sledge.runInTransaction(() async {
@@ -96,7 +96,7 @@
       'Check that creating then rolling back a document does not prevent from'
       'creating it later', () async {
     Schema schema = newSchema();
-    final id = new DocumentId(schema);
+    final id = DocumentId(schema);
     Sledge sledge = newSledgeForTesting();
     await sledge.runInTransaction(() async {
       await sledge.getDocument(id);
@@ -118,7 +118,7 @@
   test('Check that operations on non-existing documents throw exceptions',
       () async {
     Schema schema = newSchema();
-    final id = new DocumentId(schema);
+    final id = DocumentId(schema);
     Sledge sledge = newSledgeForTesting();
     Document doc;
     await sledge.runInTransaction(() async {
diff --git a/public/dart/sledge/test/fakes/fake_ledger_object_factories.dart b/public/dart/sledge/test/fakes/fake_ledger_object_factories.dart
index aa3113d..6aae0a2 100644
--- a/public/dart/sledge/test/fakes/fake_ledger_object_factories.dart
+++ b/public/dart/sledge/test/fakes/fake_ledger_object_factories.dart
@@ -18,9 +18,9 @@
 
   @override
   ledger.PageWatcherBinding newPageWatcherBinding() =>
-      new FakePageWatcherBinding();
+      FakePageWatcherBinding();
 
   @override
   ledger.PageSnapshotProxy newPageSnapshotProxy() =>
-      new FakeLedgerPageSnapshot(_fakeLedgerPage);
+      FakeLedgerPageSnapshot(_fakeLedgerPage);
 }
diff --git a/public/dart/sledge/test/fakes/fake_ledger_page.dart b/public/dart/sledge/test/fakes/fake_ledger_page.dart
index 79627b6..de0c32b 100644
--- a/public/dart/sledge/test/fakes/fake_ledger_page.dart
+++ b/public/dart/sledge/test/fakes/fake_ledger_page.dart
@@ -17,29 +17,29 @@
 List<ledger.Entry> convertToEntries(final List<KeyValue> changedEntries) {
   final List<ledger.Entry> convertedEntries = <ledger.Entry>[];
   for (final keyValue in changedEntries) {
-    convertedEntries.add(new ledger.Entry(
+    convertedEntries.add(ledger.Entry(
         key: keyValue.key,
-        value: new lib$fuchsia_mem.Buffer(
-            vmo: new FakeVmo(keyValue.value), size: keyValue.value.length),
-        priority: new ledger.Priority(0)));
+        value: lib$fuchsia_mem.Buffer(
+            vmo: FakeVmo(keyValue.value), size: keyValue.value.length),
+        priority: ledger.Priority(0)));
   }
   return convertedEntries;
 }
 
 class FakeLedgerPage extends ledger.PageProxy {
   StorageState _storageState;
-  final Change _modification = new Change();
+  final Change _modification = Change();
   dynamic _watcher;
 
   FakeLedgerPage() {
-    _storageState = new StorageState(onChange);
+    _storageState = StorageState(onChange);
   }
 
   StorageState get storageState => _storageState;
 
   @override
   void putNew(Uint8List key, Uint8List value) {
-    _modification.changedEntries.add(new KeyValue(key, value));
+    _modification.changedEntries.add(KeyValue(key, value));
   }
 
   @override
@@ -78,7 +78,7 @@
 
   void onChange(Change change) {
     _watcher.onChange(
-        new ledger.PageChange(
+        ledger.PageChange(
             timestamp: null,
             changedEntries: convertToEntries(change.changedEntries),
             deletedKeys: change.deletedKeys),
diff --git a/public/dart/sledge/test/fakes/fake_ledger_page_snapshot.dart b/public/dart/sledge/test/fakes/fake_ledger_page_snapshot.dart
index a8796f9..25f2ff9 100644
--- a/public/dart/sledge/test/fakes/fake_ledger_page_snapshot.dart
+++ b/public/dart/sledge/test/fakes/fake_ledger_page_snapshot.dart
@@ -24,7 +24,7 @@
 
   @override
   ProxyController<FakeLedgerPageSnapshot> get ctrl =>
-      new _FakeProxyController<FakeLedgerPageSnapshot>();
+      _FakeProxyController<FakeLedgerPageSnapshot>();
 
   @override
   void getEntries(
diff --git a/public/dart/sledge/test/fakes/fake_ledger_page_watcher_binding.dart b/public/dart/sledge/test/fakes/fake_ledger_page_watcher_binding.dart
index 1b797e0..5b82613 100644
--- a/public/dart/sledge/test/fakes/fake_ledger_page_watcher_binding.dart
+++ b/public/dart/sledge/test/fakes/fake_ledger_page_watcher_binding.dart
@@ -23,6 +23,6 @@
   @override
   fidl.InterfaceHandle<ledger.PageWatcher> wrap(
       ledger.PageWatcher pageWatcher) {
-    return new FakePageWatcherInterfaceHandle(pageWatcher);
+    return FakePageWatcherInterfaceHandle(pageWatcher);
   }
 }
diff --git a/public/dart/sledge/test/fakes/fake_vmo.dart b/public/dart/sledge/test/fakes/fake_vmo.dart
index a911782..6a2b691 100644
--- a/public/dart/sledge/test/fakes/fake_vmo.dart
+++ b/public/dart/sledge/test/fakes/fake_vmo.dart
@@ -16,7 +16,7 @@
     if (_data == null) {
       return super.getSize();
     }
-    return new GetSizeResult(ZX.OK, _data.length);
+    return GetSizeResult(ZX.OK, _data.length);
   }
 
   @override
@@ -30,7 +30,7 @@
     if (len < numBytes) {
       // TODO: decide on returning status
     }
-    return new ReadResult(
+    return ReadResult(
         ZX.OK, buffer.asByteData(offsetInBytes, len), len, null);
   }
 }
diff --git a/public/dart/sledge/test/get_documents_test.dart b/public/dart/sledge/test/get_documents_test.dart
index a44e2f7..798f7a7 100644
--- a/public/dart/sledge/test/get_documents_test.dart
+++ b/public/dart/sledge/test/get_documents_test.dart
@@ -10,22 +10,22 @@
 import 'helpers.dart';
 
 Schema _newSchema1() {
-  final schemaDescription = <String, BaseType>{'s1': new LastOneWinsString()};
-  return new Schema(schemaDescription);
+  final schemaDescription = <String, BaseType>{'s1': LastOneWinsString()};
+  return Schema(schemaDescription);
 }
 
 Schema _newSchema2() {
-  final schemaDescription = <String, BaseType>{'s2': new LastOneWinsString()};
-  return new Schema(schemaDescription);
+  final schemaDescription = <String, BaseType>{'s2': LastOneWinsString()};
+  return Schema(schemaDescription);
 }
 
 Schema _newSchema3() {
   final schemaDescription = <String, BaseType>{
-    'i1': new Integer(),
-    'i2': new Integer(),
-    's3': new LastOneWinsString(),
+    'i1': Integer(),
+    'i2': Integer(),
+    's3': LastOneWinsString(),
   };
-  return new Schema(schemaDescription);
+  return Schema(schemaDescription);
 }
 
 void main() async {
@@ -36,7 +36,7 @@
       Schema schema = _newSchema1();
       Sledge sledge = newSledgeForTesting();
       await sledge.runInTransaction(() async {
-        final query = new Query(schema);
+        final query = Query(schema);
         final docs = await sledge.getDocuments(query);
         expect(docs.length, equals(0));
       });
@@ -51,21 +51,21 @@
       Document docB;
       // Save 3 documents in Sledge, two of which are instances of schema1.
       await sledge.runInTransaction(() async {
-        docA = await sledge.getDocument(new DocumentId(schema1));
+        docA = await sledge.getDocument(DocumentId(schema1));
         docA['s1'].value = 'foo';
-        docB = await sledge.getDocument(new DocumentId(schema1));
+        docB = await sledge.getDocument(DocumentId(schema1));
         docB['s1'].value = 'bar';
-        final otherDoc = await sledge.getDocument(new DocumentId(schema2));
+        final otherDoc = await sledge.getDocument(DocumentId(schema2));
         otherDoc['s2'].value = 'baz';
 
         // Verify that `getDocuments` does not return any documents.
-        final docs = await sledge.getDocuments(new Query(schema1));
+        final docs = await sledge.getDocuments(Query(schema1));
         expect(docs.length, equals(0));
       });
 
       // Verify that `getDocuments` returns all instances of schema1.
       await sledge.runInTransaction(() async {
-        final docs = await sledge.getDocuments(new Query(schema1));
+        final docs = await sledge.getDocuments(Query(schema1));
         expect(docs.length, equals(2));
         expect(docs, contains(docA));
         expect(docs, contains(docB));
@@ -79,10 +79,10 @@
       Sledge sledge = newSledgeForTesting();
       await sledge.runInTransaction(() async {
         final comparisons = <String, QueryFieldComparison>{
-          'i1': new QueryFieldComparison(
-              new NumFieldValue(42), ComparisonType.equal)
+          'i1': QueryFieldComparison(
+              NumFieldValue(42), ComparisonType.equal)
         };
-        final query = new Query(schema, comparisons: comparisons);
+        final query = Query(schema, comparisons: comparisons);
         final docs = await sledge.getDocuments(query);
         expect(docs.length, equals(0));
       });
@@ -98,38 +98,38 @@
       Document doc4;
       Document doc5;
       await sledge.runInTransaction(() async {
-        doc1 = await sledge.getDocument(new DocumentId(schema));
+        doc1 = await sledge.getDocument(DocumentId(schema));
         doc1['i1'].value = 1;
         doc1['i2'].value = 10;
-        doc2 = await sledge.getDocument(new DocumentId(schema));
+        doc2 = await sledge.getDocument(DocumentId(schema));
         doc2['i1'].value = 2;
         doc2['i2'].value = 20;
-        doc3 = await sledge.getDocument(new DocumentId(schema));
+        doc3 = await sledge.getDocument(DocumentId(schema));
         doc3['i1'].value = 1;
         doc3['i2'].value = 30;
-        doc4 = await sledge.getDocument(new DocumentId(schema));
+        doc4 = await sledge.getDocument(DocumentId(schema));
         doc4['i1'].value = 2;
         doc4['i2'].value = 30;
-        doc5 = await sledge.getDocument(new DocumentId(schema));
+        doc5 = await sledge.getDocument(DocumentId(schema));
         doc5['i1'].value = 2;
         doc5['i2'].value = 20;
       });
       // Verify the resuts of queries with equalities.
       await sledge.runInTransaction(() async {
         {
-          QueryBuilder qb = new QueryBuilder(schema)..addEqual('i1', 1);
+          QueryBuilder qb = QueryBuilder(schema)..addEqual('i1', 1);
           final docs = await sledge.getDocuments(qb.build());
           expect(docs.length, equals(2));
           expect(docs, containsAll([doc1, doc3]));
         }
         {
-          QueryBuilder qb = new QueryBuilder(schema)..addEqual('i2', 30);
+          QueryBuilder qb = QueryBuilder(schema)..addEqual('i2', 30);
           final docs = await sledge.getDocuments(qb.build());
           expect(docs.length, equals(2));
           expect(docs, containsAll([doc3, doc4]));
         }
         {
-          QueryBuilder qb = new QueryBuilder(schema)
+          QueryBuilder qb = QueryBuilder(schema)
             ..addEqual('i1', 2)
             ..addEqual('i2', 30);
           final docs = await sledge.getDocuments(qb.build());
@@ -139,12 +139,12 @@
       });
       // Verify the resuts of queries with inequalities.
       await sledge.runInTransaction(() async {
-        final lessQb = new QueryBuilder(schema)..addLess('i2', 20);
-        final lessOrEqualQb = new QueryBuilder(schema)
+        final lessQb = QueryBuilder(schema)..addLess('i2', 20);
+        final lessOrEqualQb = QueryBuilder(schema)
           ..addLessOrEqual('i2', 20);
-        final greaterOrEqualQb = new QueryBuilder(schema)
+        final greaterOrEqualQb = QueryBuilder(schema)
           ..addGreaterOrEqual('i2', 20);
-        final greaterQb = new QueryBuilder(schema)..addGreater('i2', 20);
+        final greaterQb = QueryBuilder(schema)..addGreater('i2', 20);
         {
           final docs = await sledge.getDocuments(lessQb.build());
           expect(docs.length, equals(1));
diff --git a/public/dart/sledge/test/helpers.dart b/public/dart/sledge/test/helpers.dart
index bb600fe..ca2ec72 100644
--- a/public/dart/sledge/test/helpers.dart
+++ b/public/dart/sledge/test/helpers.dart
@@ -19,10 +19,10 @@
   SledgeForTesting(FakeLedgerPage fakeLedgerPage)
       : fakeLedgerPage = fakeLedgerPage,
         super.testing(
-            fakeLedgerPage, new FakeLedgerObjectsFactory(fakeLedgerPage));
+            fakeLedgerPage, FakeLedgerObjectsFactory(fakeLedgerPage));
 
   Document fakeGetDocument(DocumentId documentId) {
-    return new Document(this, documentId);
+    return Document(this, documentId);
   }
 
   @override
@@ -32,10 +32,10 @@
 
   void startInfiniteTransaction() {
     _fakeTransaction =
-        new Transaction(null, null, new FakeLedgerObjectsFactory(null));
+        Transaction(null, null, FakeLedgerObjectsFactory(null));
   }
 }
 
 SledgeForTesting newSledgeForTesting() {
-  return new SledgeForTesting(new FakeLedgerPage());
+  return SledgeForTesting(FakeLedgerPage());
 }
diff --git a/public/dart/sledge/test/integration_tests/helpers.dart b/public/dart/sledge/test/integration_tests/helpers.dart
index 507c7dc..a322419 100644
--- a/public/dart/sledge/test/integration_tests/helpers.dart
+++ b/public/dart/sledge/test/integration_tests/helpers.dart
@@ -29,13 +29,13 @@
 Future<LedgerTestInstanceProvider> newLedgerTestInstanceProvider() async {
   String server =
       'fuchsia-pkg://fuchsia.com/ledger_test_instance_provider#meta/ledger_test_instance_provider.cmx';
-  final Services services = new Services();
+  final Services services = Services();
   final LaunchInfo launchInfo =
-      new LaunchInfo(url: server, directoryRequest: services.request());
-  final context = new StartupContext.fromStartupInfo();
-  final ComponentControllerProxy controller = new ComponentControllerProxy();
+      LaunchInfo(url: server, directoryRequest: services.request());
+  final context = StartupContext.fromStartupInfo();
+  final ComponentControllerProxy controller = ComponentControllerProxy();
   await context.launcher.createComponent(launchInfo, controller.ctrl.request());
-  return new LedgerTestInstanceProvider(services, controller);
+  return LedgerTestInstanceProvider(services, controller);
 }
 
 /// Sledge subclass that makes sure the ComponentControllerProxy does not get GCed.
@@ -54,12 +54,12 @@
 Future<Sledge> newSledgeForTesting(
     {SledgePageId pageId,
     LedgerTestInstanceProvider ledgerInstanceProvider}) async {
-  pageId ??= new SledgePageId('');
+  pageId ??= SledgePageId('');
   ledgerInstanceProvider ??= await newLedgerTestInstanceProvider();
   fidl.InterfaceHandle<ledger.Ledger> ledgerHandle =
       await ledgerInstanceProvider.services
           .connectToServiceByName<ledger.Ledger>(ledger.Ledger.$serviceName);
-  final sledge = new _SledgeForTesting(
+  final sledge = _SledgeForTesting(
       ledgerHandle, pageId, ledgerInstanceProvider._controller);
   return sledge;
 }
diff --git a/public/dart/sledge/test/integration_tests/sledge_integration_test.dart b/public/dart/sledge/test/integration_tests/sledge_integration_test.dart
index 6f8a054..75e477e 100644
--- a/public/dart/sledge/test/integration_tests/sledge_integration_test.dart
+++ b/public/dart/sledge/test/integration_tests/sledge_integration_test.dart
@@ -9,20 +9,20 @@
 
 void main() {
   test('Save a document', () async {
-    final pageId = new SledgePageId('some page');
+    final pageId = SledgePageId('some page');
     final ledgerInstanceProvider = await newLedgerTestInstanceProvider();
     final activeSledge = await newSledgeForTesting(
         ledgerInstanceProvider: ledgerInstanceProvider, pageId: pageId);
     Map<String, BaseType> schemaDescription = <String, BaseType>{
-      'someInteger': new Integer()
+      'someInteger': Integer()
     };
-    Schema schema = new Schema(schemaDescription);
-    DocumentId id = new DocumentId(schema);
+    Schema schema = Schema(schemaDescription);
+    DocumentId id = DocumentId(schema);
 
     // Store a document in Sledge.
     await activeSledge.runInTransaction(() async {
       final List<Document> documents =
-          await activeSledge.getDocuments(new Query(schema));
+          await activeSledge.getDocuments(Query(schema));
       assert(documents.isEmpty);
       assert(await activeSledge.documentExists(id) == false);
 
@@ -39,7 +39,7 @@
         ledgerInstanceProvider: ledgerInstanceProvider, pageId: pageId);
     await passiveSledge.runInTransaction(() async {
       final List<Document> documents =
-          await passiveSledge.getDocuments(new Query(schema));
+          await passiveSledge.getDocuments(Query(schema));
       assert(documents.isNotEmpty);
       assert(await passiveSledge.documentExists(id) == true);
       Document doc = await passiveSledge.getDocument(id);
@@ -48,13 +48,13 @@
 
     // Verify that the document is not present in a Sledge instance
     // created with a different page.
-    final unrelatedPageId = new SledgePageId('some other page');
+    final unrelatedPageId = SledgePageId('some other page');
     final unrelatedSledge = await newSledgeForTesting(
         ledgerInstanceProvider: ledgerInstanceProvider,
         pageId: unrelatedPageId);
     await unrelatedSledge.runInTransaction(() async {
       final List<Document> documents =
-          await unrelatedSledge.getDocuments(new Query(schema));
+          await unrelatedSledge.getDocuments(Query(schema));
       assert(documents.isEmpty);
     });
 
diff --git a/public/dart/sledge/test/ledger_helpers_test.dart b/public/dart/sledge/test/ledger_helpers_test.dart
index 09ffadd..db81764 100644
--- a/public/dart/sledge/test/ledger_helpers_test.dart
+++ b/public/dart/sledge/test/ledger_helpers_test.dart
@@ -20,29 +20,29 @@
 
   group('Transform ledger types.', () {
     test('Convert empty change', () {
-      const emptyPageChange = const ledger.PageChange(
+      const emptyPageChange = ledger.PageChange(
           timestamp: 0,
-          changedEntries: const <ledger.Entry>[],
-          deletedKeys: const <Uint8List>[]);
+          changedEntries: <ledger.Entry>[],
+          deletedKeys: <Uint8List>[]);
       final change = getChangeFromPageChange(emptyPageChange);
-      expect(change, new ChangeMatcher(new Change()));
+      expect(change, ChangeMatcher(Change()));
     });
 
     test('Convert non empty change', () {
-      final pageChange = new ledger.PageChange(
+      final pageChange = ledger.PageChange(
           timestamp: 0,
           changedEntries: <ledger.Entry>[],
           deletedKeys: <Uint8List>[
-            new Uint8List.fromList([0]),
-            new Uint8List.fromList([1, 2])
+            Uint8List.fromList([0]),
+            Uint8List.fromList([1, 2])
           ]);
-      final ourChange = new Change([], [
-        new Uint8List.fromList([0]),
-        new Uint8List.fromList([1, 2])
+      final ourChange = Change([], [
+        Uint8List.fromList([0]),
+        Uint8List.fromList([1, 2])
       ]);
 
       final change = getChangeFromPageChange(pageChange);
-      expect(change, new ChangeMatcher(ourChange));
+      expect(change, ChangeMatcher(ourChange));
     });
   });
 }
diff --git a/public/dart/sledge/test/query/index_definition_test.dart b/public/dart/sledge/test/query/index_definition_test.dart
index 13a8b5a..5c1ec25 100644
--- a/public/dart/sledge/test/query/index_definition_test.dart
+++ b/public/dart/sledge/test/query/index_definition_test.dart
@@ -10,19 +10,19 @@
 
 Schema testSchema1() {
   final schemaDescription = <String, BaseType>{
-    'a': new Integer(),
-    'b': new Integer(),
+    'a': Integer(),
+    'b': Integer(),
   };
-  return new Schema(schemaDescription);
+  return Schema(schemaDescription);
 }
 
 Schema testSchema2() {
   final schemaDescription = <String, BaseType>{
-    'a': new Integer(),
-    'b': new Integer(),
-    'c': new Integer(),
+    'a': Integer(),
+    'b': Integer(),
+    'c': Integer(),
   };
-  return new Schema(schemaDescription);
+  return Schema(schemaDescription);
 }
 
 void main() {
@@ -30,29 +30,29 @@
 
   test('IndexDefinition constructor.', () {
     final schema = testSchema1();
-    new IndexDefinition(schema);
-    new IndexDefinition(schema, fieldsWithEquality: <String>['a']);
-    new IndexDefinition(schema, fieldsWithEquality: <String>['a', 'b']);
-    new IndexDefinition(schema, fieldWithInequality: 'a');
-    new IndexDefinition(schema,
+    IndexDefinition(schema);
+    IndexDefinition(schema, fieldsWithEquality: <String>['a']);
+    IndexDefinition(schema, fieldsWithEquality: <String>['a', 'b']);
+    IndexDefinition(schema, fieldWithInequality: 'a');
+    IndexDefinition(schema,
         fieldsWithEquality: <String>['a'], fieldWithInequality: 'b');
-    expect(() => new IndexDefinition(schema, fieldsWithEquality: <String>['']),
+    expect(() => IndexDefinition(schema, fieldsWithEquality: <String>['']),
         throwsArgumentError);
-    expect(() => new IndexDefinition(schema, fieldsWithEquality: <String>['z']),
+    expect(() => IndexDefinition(schema, fieldsWithEquality: <String>['z']),
         throwsArgumentError);
     expect(
         () =>
-            new IndexDefinition(schema, fieldsWithEquality: <String>['a', 'a']),
+            IndexDefinition(schema, fieldsWithEquality: <String>['a', 'a']),
         throwsArgumentError);
     expect(
-        () => new IndexDefinition(schema,
+        () => IndexDefinition(schema,
             fieldsWithEquality: <String>['a'], fieldWithInequality: 'a'),
         throwsArgumentError);
   });
 
   test('IndexDefinition serialization and deserialization.', () {
     final schema1 = testSchema1();
-    final i1 = new IndexDefinition(schema1,
+    final i1 = IndexDefinition(schema1,
         fieldsWithEquality: <String>['a'], fieldWithInequality: 'b');
     String jsonString = json.encode(i1);
     print(jsonString);
@@ -63,10 +63,10 @@
   test('IndexDefinition hash.', () {
     final schema1 = testSchema1();
     final schema2 = testSchema2();
-    final i1 = new IndexDefinition(schema1, fieldsWithEquality: <String>['a']);
-    final i2 = new IndexDefinition(schema1, fieldsWithEquality: <String>['a']);
-    final i3 = new IndexDefinition(schema2, fieldsWithEquality: <String>['a']);
-    final i4 = new IndexDefinition(schema1, fieldsWithEquality: <String>['b']);
+    final i1 = IndexDefinition(schema1, fieldsWithEquality: <String>['a']);
+    final i2 = IndexDefinition(schema1, fieldsWithEquality: <String>['a']);
+    final i3 = IndexDefinition(schema2, fieldsWithEquality: <String>['a']);
+    final i4 = IndexDefinition(schema1, fieldsWithEquality: <String>['b']);
     expect(i1.hash, equals(i2.hash));
     expect(i1.hash, isNot(equals(i3.hash)));
     expect(i1.hash, isNot(equals(i4.hash)));
diff --git a/public/dart/sledge/test/query/query_builder_test.dart b/public/dart/sledge/test/query/query_builder_test.dart
index ee3ede5..1997e40 100644
--- a/public/dart/sledge/test/query/query_builder_test.dart
+++ b/public/dart/sledge/test/query/query_builder_test.dart
@@ -8,10 +8,10 @@
 
 Schema _newSchema() {
   final schemaDescription = <String, BaseType>{
-    'a': new Integer(),
-    'b': new Integer(),
+    'a': Integer(),
+    'b': Integer(),
   };
-  return new Schema(schemaDescription);
+  return Schema(schemaDescription);
 }
 
 void main() {
@@ -19,7 +19,7 @@
 
   test('Verify exceptions', () async {
     Schema schema = _newSchema();
-    QueryBuilder qb = new QueryBuilder(schema)..addEqual('a', 1);
+    QueryBuilder qb = QueryBuilder(schema)..addEqual('a', 1);
     // Test adding multiple restrictions on the same field.
     expect(() => qb.addEqual('a', 2), throwsArgumentError);
     // Test passing an unsuported type.
diff --git a/public/dart/sledge/test/query/query_test.dart b/public/dart/sledge/test/query/query_test.dart
index ec76216..9bc2b9c 100644
--- a/public/dart/sledge/test/query/query_test.dart
+++ b/public/dart/sledge/test/query/query_test.dart
@@ -11,18 +11,18 @@
 
 Schema _newSchema() {
   final schemaDescription = <String, BaseType>{
-    'a': new Integer(),
-    'b': new LastOneWinsString(),
-    'c': new Integer(),
+    'a': Integer(),
+    'b': LastOneWinsString(),
+    'c': Integer(),
   };
-  return new Schema(schemaDescription);
+  return Schema(schemaDescription);
 }
 
 Schema _newSchema2() {
   final schemaDescription = <String, BaseType>{
-    'a': new Integer(),
+    'a': Integer(),
   };
-  return new Schema(schemaDescription);
+  return Schema(schemaDescription);
 }
 
 void main() {
@@ -34,48 +34,48 @@
     // Test invalid comparisons
     final comparisonWithNonExistantField = <String, QueryFieldComparison>{
       'foo':
-          new QueryFieldComparison(new NumFieldValue(42), ComparisonType.equal)
+          QueryFieldComparison(NumFieldValue(42), ComparisonType.equal)
     };
-    expect(() => new Query(schema, comparisons: comparisonWithNonExistantField),
+    expect(() => Query(schema, comparisons: comparisonWithNonExistantField),
         throwsArgumentError);
     final comparisonWithWrongType = <String, QueryFieldComparison>{
-      'b': new QueryFieldComparison(new NumFieldValue(42), ComparisonType.equal)
+      'b': QueryFieldComparison(NumFieldValue(42), ComparisonType.equal)
     };
-    expect(() => new Query(schema, comparisons: comparisonWithWrongType),
+    expect(() => Query(schema, comparisons: comparisonWithWrongType),
         throwsArgumentError);
 
     // Test too many inequalities
     final comparisonWithMultipleInequalities = <String, QueryFieldComparison>{
-      'a': new QueryFieldComparison(
-          new NumFieldValue(42), ComparisonType.greater),
-      'c': new QueryFieldComparison(
-          new NumFieldValue(42), ComparisonType.greater)
+      'a': QueryFieldComparison(
+          NumFieldValue(42), ComparisonType.greater),
+      'c': QueryFieldComparison(
+          NumFieldValue(42), ComparisonType.greater)
     };
     expect(
         () =>
-            new Query(schema, comparisons: comparisonWithMultipleInequalities),
+            Query(schema, comparisons: comparisonWithMultipleInequalities),
         throwsArgumentError);
   });
 
   test('Verify `filtersDocuments`', () async {
     Schema schema = _newSchema();
 
-    final query1 = new Query(schema);
+    final query1 = Query(schema);
     expect(query1.filtersDocuments(), equals(false));
 
     // Test with equalities
     final equality = <String, QueryFieldComparison>{
-      'a': new QueryFieldComparison(new NumFieldValue(42), ComparisonType.equal)
+      'a': QueryFieldComparison(NumFieldValue(42), ComparisonType.equal)
     };
-    final query2 = new Query(schema, comparisons: equality);
+    final query2 = Query(schema, comparisons: equality);
     expect(query2.filtersDocuments(), equals(true));
 
     // Test with inequality
     final inequality = <String, QueryFieldComparison>{
-      'a': new QueryFieldComparison(
-          new NumFieldValue(42), ComparisonType.greater)
+      'a': QueryFieldComparison(
+          NumFieldValue(42), ComparisonType.greater)
     };
-    final query3 = new Query(schema, comparisons: inequality);
+    final query3 = Query(schema, comparisons: inequality);
     expect(query3.filtersDocuments(), equals(true));
   });
 
@@ -83,23 +83,23 @@
     Sledge sledge = newSledgeForTesting();
     Schema schema = _newSchema();
     final equality = <String, QueryFieldComparison>{
-      'a': new QueryFieldComparison(new NumFieldValue(42), ComparisonType.equal)
+      'a': QueryFieldComparison(NumFieldValue(42), ComparisonType.equal)
     };
     final inequality = <String, QueryFieldComparison>{
-      'a': new QueryFieldComparison(
-          new NumFieldValue(42), ComparisonType.greater)
+      'a': QueryFieldComparison(
+          NumFieldValue(42), ComparisonType.greater)
     };
-    final queryWithoutFilter = new Query(schema);
-    final queryWithEqualities = new Query(schema, comparisons: equality);
-    final queryWithInequality = new Query(schema, comparisons: inequality);
+    final queryWithoutFilter = Query(schema);
+    final queryWithEqualities = Query(schema, comparisons: equality);
+    final queryWithInequality = Query(schema, comparisons: inequality);
     await sledge.runInTransaction(() async {
-      Document doc1 = await sledge.getDocument(new DocumentId(schema));
+      Document doc1 = await sledge.getDocument(DocumentId(schema));
       doc1['a'].value = 1;
-      Document doc2 = await sledge.getDocument(new DocumentId(schema));
+      Document doc2 = await sledge.getDocument(DocumentId(schema));
       doc2['a'].value = 42;
-      Document doc3 = await sledge.getDocument(new DocumentId(schema));
+      Document doc3 = await sledge.getDocument(DocumentId(schema));
       doc3['a'].value = 43;
-      Document doc4 = await sledge.getDocument(new DocumentId(_newSchema2()));
+      Document doc4 = await sledge.getDocument(DocumentId(_newSchema2()));
       doc4['a'].value = 42;
       expect(queryWithoutFilter.documentMatchesQuery(doc1), equals(true));
       expect(queryWithoutFilter.documentMatchesQuery(doc2), equals(true));
diff --git a/public/dart/sledge/test/schema_test.dart b/public/dart/sledge/test/schema_test.dart
index 41dae49..6f64f3e 100644
--- a/public/dart/sledge/test/schema_test.dart
+++ b/public/dart/sledge/test/schema_test.dart
@@ -17,98 +17,98 @@
 
 Map<String, BaseType> flatSchema() {
   return <String, BaseType>{
-    'someBool': new Boolean(),
-    'someInteger': new Integer()
+    'someBool': Boolean(),
+    'someInteger': Integer()
   };
 }
 
 Map<String, BaseType> schemaWithEmbeddedSchema() {
-  Schema schema = new Schema(flatSchema());
-  return <String, BaseType>{'foo': schema, 'bar': new LastOneWinsString()};
+  Schema schema = Schema(flatSchema());
+  return <String, BaseType>{'foo': schema, 'bar': LastOneWinsString()};
 }
 
 void main() {
   setupLogger();
 
   test('Create flat schema', () {
-    new Schema(flatSchema());
+    Schema(flatSchema());
   });
 
   test('Create schema with embedded schema.', () {
-    new Schema(schemaWithEmbeddedSchema());
+    Schema(schemaWithEmbeddedSchema());
   });
 
   test('Serialize and deserialize flat schema', () {
-    Schema schema1 = new Schema(flatSchema());
+    Schema schema1 = Schema(flatSchema());
     final json1 = json.encode(schema1);
-    Schema schema2 = new Schema.fromJson(json.decode(json1));
+    Schema schema2 = Schema.fromJson(json.decode(json1));
     final json2 = json.encode(schema2);
     expect(json1, equals(json2));
   });
 
   test('Serialize and deserialize schema with embedded schema', () {
-    Schema schema1 = new Schema(schemaWithEmbeddedSchema());
+    Schema schema1 = Schema(schemaWithEmbeddedSchema());
     final json1 = json.encode(schema1);
-    Schema schema2 = new Schema.fromJson(json.decode(json1));
+    Schema schema2 = Schema.fromJson(json.decode(json1));
     final json2 = json.encode(schema2);
     expect(json1, equals(json2));
   });
 
   test('Verify that two identical schemes result in identical hashes', () {
     Map<String, BaseType> schemaDescription1 = <String, BaseType>{
-      'someBool': new Boolean(),
-      'someInteger': new Integer()
+      'someBool': Boolean(),
+      'someInteger': Integer()
     };
     Map<String, BaseType> schemaDescription2 = <String, BaseType>{
-      'someInteger': new Integer(),
-      'someBool': new Boolean(),
+      'someInteger': Integer(),
+      'someBool': Boolean(),
     };
-    Schema schema1 = new Schema(schemaDescription1);
-    Schema schema2 = new Schema(schemaDescription2);
+    Schema schema1 = Schema(schemaDescription1);
+    Schema schema2 = Schema(schemaDescription2);
     expect(schema1.hash, equals(schema2.hash));
   });
 
   test('Verify that two different schemes result in different hashes', () {
     Map<String, BaseType> schemaDescription1 = <String, BaseType>{
-      'someBool': new Boolean(),
-      'someInteger': new Integer()
+      'someBool': Boolean(),
+      'someInteger': Integer()
     };
     Map<String, BaseType> schemaDescription2 = <String, BaseType>{
-      'someBool': new Boolean(),
+      'someBool': Boolean(),
     };
     Map<String, BaseType> schemaDescription3 = <String, BaseType>{
-      'someBool_': new Boolean(),
-      'someInteger': new Integer()
+      'someBool_': Boolean(),
+      'someInteger': Integer()
     };
-    Schema schema1 = new Schema(schemaDescription1);
-    Schema schema2 = new Schema(schemaDescription2);
-    Schema schema3 = new Schema(schemaDescription3);
+    Schema schema1 = Schema(schemaDescription1);
+    Schema schema2 = Schema(schemaDescription2);
+    Schema schema3 = Schema(schemaDescription3);
     expect(schema1.hash, isNot(equals(schema2.hash)));
     expect(schema1.hash, isNot(equals(schema3.hash)));
   });
 
   test('Verify that schemas can not be modified after their creation', () {
     Map<String, BaseType> schemaDescription = <String, BaseType>{
-      'someBool': new Boolean(),
+      'someBool': Boolean(),
     };
-    Schema schema = new Schema(schemaDescription);
+    Schema schema = Schema(schemaDescription);
     Uint8List hash1 = schema.hash;
-    schemaDescription['foo'] = new Integer();
+    schemaDescription['foo'] = Integer();
     Uint8List hash2 = schema.hash;
     expect(hash1, equals(hash2));
   });
 
   test('Verify exception with invalid field names', () {
     Map<String, BaseType> schemaDescription = <String, BaseType>{
-      'foo.bar': new Boolean(),
+      'foo.bar': Boolean(),
     };
     expect(() {
-      new Schema(schemaDescription);
+      Schema(schemaDescription);
     }, throwsA(const TypeMatcher<ArgumentError>()));
   });
 
   test('Verify fieldAtPath', () {
-    final schema = new Schema(schemaWithEmbeddedSchema());
+    final schema = Schema(schemaWithEmbeddedSchema());
     expect(schema.fieldAtPath(null), equals(null));
     expect(schema.fieldAtPath(''), equals(null));
     expect(schema.fieldAtPath('.'), equals(null));
@@ -125,20 +125,20 @@
   test('Instantiate and initialize a Sledge document', () async {
     // Create schemas.
     Map<String, BaseType> schemaDescription = <String, BaseType>{
-      'someBool': new Boolean(),
-      'someInteger': new Integer()
+      'someBool': Boolean(),
+      'someInteger': Integer()
     };
-    Schema schema = new Schema(schemaDescription);
+    Schema schema = Schema(schemaDescription);
     Map<String, BaseType> schemaDescription2 = <String, BaseType>{
       'foo': schema
     };
-    Schema schema2 = new Schema(schemaDescription2);
+    Schema schema2 = Schema(schemaDescription2);
 
     // Create a new Sledge document.
     Sledge sledge = newSledgeForTesting();
     Document doc;
     await sledge.runInTransaction(() async {
-      doc = await sledge.getDocument(new DocumentId(schema2));
+      doc = await sledge.getDocument(DocumentId(schema2));
     });
     // Read and write properties of a Sledge document.
     expect(doc['foo']['someBool'].value, equals(false));
@@ -154,18 +154,18 @@
   test('Last One Wins basic types.', () async {
     // Create schemas.
     Map<String, BaseType> schemaDescription = <String, BaseType>{
-      'someBool': new Boolean(),
-      'someInteger': new Integer(),
-      'someDouble': new Double(),
-      'someString': new LastOneWinsString()
+      'someBool': Boolean(),
+      'someInteger': Integer(),
+      'someDouble': Double(),
+      'someString': LastOneWinsString()
     };
-    Schema schema = new Schema(schemaDescription);
+    Schema schema = Schema(schemaDescription);
 
     // Create a new Sledge document.
     Sledge sledge = newSledgeForTesting();
     Document doc;
     await sledge.runInTransaction(() async {
-      doc = await sledge.getDocument(new DocumentId(schema));
+      doc = await sledge.getDocument(DocumentId(schema));
     });
 
     // Read and write properties of a Sledge document.
@@ -190,16 +190,16 @@
   test('Integration of PosNegCounter with Sledge', () async {
     // Create Schema.
     Map<String, BaseType> schemaDescription = <String, BaseType>{
-      'cnt': new IntCounter(),
-      'cnt_d': new DoubleCounter()
+      'cnt': IntCounter(),
+      'cnt_d': DoubleCounter()
     };
-    Schema schema = new Schema(schemaDescription);
+    Schema schema = Schema(schemaDescription);
 
     // Create a new Sledge document.
     Sledge sledge = newSledgeForTesting();
     Document doc;
     await sledge.runInTransaction(() async {
-      doc = await sledge.getDocument(new DocumentId(schema));
+      doc = await sledge.getDocument(DocumentId(schema));
     });
 
     // Modify and get value of PosNegCounter.
@@ -225,27 +225,27 @@
 
   test('Integration of OrderedList with Sledge', () async {
     Map<String, BaseType> schemaDescription = <String, BaseType>{
-      'list': new OrderedList()
+      'list': OrderedList()
     };
-    Schema schema = new Schema(schemaDescription);
+    Schema schema = Schema(schemaDescription);
 
     // Create a new Sledge document.
     Sledge sledge = newSledgeForTesting();
     Document doc;
     await sledge.runInTransaction(() async {
-      doc = await sledge.getDocument(new DocumentId(schema));
+      doc = await sledge.getDocument(DocumentId(schema));
     });
 
     // Apply modifications to OrderedList.
     expect(doc['list'].toList(), equals([]));
     await sledge.runInTransaction(() async {
-      doc['list'].insert(0, new Uint8List.fromList([1]));
+      doc['list'].insert(0, Uint8List.fromList([1]));
     });
     expect(doc['list'].toList().length, equals(1));
     expect(doc['list'][0].toList(), equals([1]));
     await sledge.runInTransaction(() async {
-      doc['list'].insert(1, new Uint8List.fromList([3]));
-      doc['list'].insert(1, new Uint8List.fromList([2]));
+      doc['list'].insert(1, Uint8List.fromList([3]));
+      doc['list'].insert(1, Uint8List.fromList([2]));
     });
     expect(doc['list'].toList().length, equals(3));
     expect(doc['list'][0].toList(), equals([1]));
@@ -256,20 +256,20 @@
   test('get and apply changes', () async {
     // Create Schema.
     Map<String, BaseType> schemaDescription = <String, BaseType>{
-      'name': new LastOneWinsString(),
-      'number': new Integer(),
-      'cnt': new IntCounter()
+      'name': LastOneWinsString(),
+      'number': Integer(),
+      'cnt': IntCounter()
     };
-    Schema schema = new Schema(schemaDescription);
+    Schema schema = Schema(schemaDescription);
 
     // Create two Sledge documents
     Sledge sledgeA = newSledgeForTesting(), sledgeB = newSledgeForTesting();
     Document docA, docB;
     await sledgeA.runInTransaction(() async {
-      docA = await sledgeA.getDocument(new DocumentId(schema));
+      docA = await sledgeA.getDocument(DocumentId(schema));
     });
     await sledgeB.runInTransaction(() async {
-      docB = await sledgeB.getDocument(new DocumentId(schema));
+      docB = await sledgeB.getDocument(DocumentId(schema));
     });
 
     Change c1;
@@ -292,18 +292,18 @@
   test('put large list into set', () async {
     // Create Schema.
     Map<String, BaseType> schemaDescription = <String, BaseType>{
-      'names': new BytelistSet(),
+      'names': BytelistSet(),
     };
-    Schema schema = new Schema(schemaDescription);
+    Schema schema = Schema(schemaDescription);
 
     // Create two Sledge documents
     Sledge sledgeA = newSledgeForTesting(), sledgeB = newSledgeForTesting();
     Document docA, docB;
     await sledgeA.runInTransaction(() async {
-      docA = await sledgeA.getDocument(new DocumentId(schema));
+      docA = await sledgeA.getDocument(DocumentId(schema));
     });
     await sledgeB.runInTransaction(() async {
-      docB = await sledgeB.getDocument(new DocumentId(schema));
+      docB = await sledgeB.getDocument(DocumentId(schema));
     });
 
     final largeList = randomUint8List(10000);
@@ -322,16 +322,16 @@
     test('rollback LastOneWinsValue', () async {
       // Create schemas.
       Map<String, BaseType> schemaDescription = <String, BaseType>{
-        'someBool': new Boolean(),
-        'someInteger': new Integer()
+        'someBool': Boolean(),
+        'someInteger': Integer()
       };
-      Schema schema = new Schema(schemaDescription);
+      Schema schema = Schema(schemaDescription);
 
       // Create a new Sledge document.
       SledgeForTesting sledge = newSledgeForTesting();
       Document doc;
       await sledge.runInTransaction(() async {
-        doc = await sledge.getDocument(new DocumentId(schema));
+        doc = await sledge.getDocument(DocumentId(schema));
       });
       // Read and write properties of a Sledge document.
       bool transactionSucceed = await sledge.runInTransaction(() async {
@@ -361,27 +361,27 @@
     test('rollback BytelistMap', () async {
       // Create schemas.
       Map<String, BaseType> schemaDescription = <String, BaseType>{
-        'map': new BytelistMap(),
+        'map': BytelistMap(),
       };
-      Schema schema = new Schema(schemaDescription);
+      Schema schema = Schema(schemaDescription);
 
       // Create a new Sledge document.
       SledgeForTesting sledge = newSledgeForTesting();
       Document doc;
       await sledge.runInTransaction(() async {
-        doc = await sledge.getDocument(new DocumentId(schema));
+        doc = await sledge.getDocument(DocumentId(schema));
       });
       // Read and write properties of a Sledge document.
       bool transactionSucceed = await sledge.runInTransaction(() async {
-        doc['map']['a'] = new Uint8List.fromList([1, 2, 3]);
+        doc['map']['a'] = Uint8List.fromList([1, 2, 3]);
       });
       expect(transactionSucceed, true);
       expect(doc['map'].length, equals(1));
 
       // Test case when transaction fails.
       transactionSucceed = await sledge.runInTransaction(() async {
-        doc['map']['a'] = new Uint8List.fromList([4]);
-        doc['map']['foo'] = new Uint8List.fromList([1, 3]);
+        doc['map']['a'] = Uint8List.fromList([4]);
+        doc['map']['foo'] = Uint8List.fromList([1, 3]);
         sledge.abortAndRollback();
       });
       expect(transactionSucceed, false);
@@ -389,7 +389,7 @@
       expect(doc['map']['a'], equals([1, 2, 3]));
 
       transactionSucceed = await sledge.runInTransaction(() async {
-        doc['map']['foo'] = new Uint8List.fromList([1, 3]);
+        doc['map']['foo'] = Uint8List.fromList([1, 3]);
       });
       expect(transactionSucceed, true);
       expect(doc['map'].length, equals(2));
@@ -397,7 +397,7 @@
       expect(doc['map']['foo'], equals([1, 3]));
 
       transactionSucceed = await sledge.runInTransaction(() async {
-        doc['map']['a'] = new Uint8List.fromList([3, 4]);
+        doc['map']['a'] = Uint8List.fromList([3, 4]);
       });
       expect(transactionSucceed, true);
       expect(doc['map']['a'], equals([3, 4]));
diff --git a/public/dart/sledge/test/schemas_obtainer_test.dart b/public/dart/sledge/test/schemas_obtainer_test.dart
index 1083d5b..2f543a5 100644
--- a/public/dart/sledge/test/schemas_obtainer_test.dart
+++ b/public/dart/sledge/test/schemas_obtainer_test.dart
@@ -15,13 +15,13 @@
 
 Map<String, BaseType> schemaDescriptionA() {
   return <String, BaseType>{
-    'boolA': new Boolean(),
+    'boolA': Boolean(),
   };
 }
 
 Map<String, BaseType> schemaDescriptionB() {
   return <String, BaseType>{
-    'boolB': new Boolean(),
+    'boolB': Boolean(),
   };
 }
 
@@ -35,8 +35,8 @@
       Set<KeyValue> keyValues = <KeyValue>{};
 
       // Add 2 KeyValues encoding 2 different schemas.
-      final schemaA = new Schema(schemaDescriptionA());
-      final schemaB = new Schema(schemaDescriptionB());
+      final schemaA = Schema(schemaDescriptionA());
+      final schemaB = Schema(schemaDescriptionB());
       final schemaPrefix =
           sledge_storage.prefixForType(sledge_storage.KeyValueType.schema);
       final keyA = concatUint8Lists(schemaPrefix, schemaA.hash);
@@ -44,8 +44,8 @@
       final keyB = concatUint8Lists(schemaPrefix, schemaB.hash);
       final valueB = getUint8ListFromString(json.encode(schemaB));
       keyValues
-        ..add(new KeyValue(keyA, valueA))
-        ..add(new KeyValue(keyB, valueB));
+        ..add(KeyValue(keyA, valueA))
+        ..add(KeyValue(keyB, valueB));
 
       Map<Uint8List, Schema> map = createSchemaMap(keyValues);
       expect(map.length, equals(2));
diff --git a/public/dart/sledge/test/sledge_page_id_test.dart b/public/dart/sledge/test/sledge_page_id_test.dart
index 9beb06d..4a1344a 100644
--- a/public/dart/sledge/test/sledge_page_id_test.dart
+++ b/public/dart/sledge/test/sledge_page_id_test.dart
@@ -13,10 +13,10 @@
   setupLogger();
 
   test('Create SledgePageId objects', () {
-    final a = new SledgePageId();
-    final b = new SledgePageId('');
-    final c = new SledgePageId('foo');
-    final d = new SledgePageId(
+    final a = SledgePageId();
+    final b = SledgePageId('');
+    final c = SledgePageId('foo');
+    final d = SledgePageId(
         'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
     expect(a.id.id, equals(b.id.id));
     expect(SledgePageId.pageIsManagedBySledge(a.id), equals(true));
@@ -26,8 +26,8 @@
   });
 
   test('pageIsManagedBySledge detects PageIds not managed by Sledge', () {
-    final bytes = new Uint8List(16);
-    final pageId = new ledger.PageId(id: bytes);
+    final bytes = Uint8List(16);
+    final pageId = ledger.PageId(id: bytes);
     expect(SledgePageId.pageIsManagedBySledge(pageId), equals(false));
   });
 
@@ -36,7 +36,7 @@
     // the SledgePageId, because if the encoding changes then clients of Sledge
     // won't be able to read their data back.
     // The format of the expected value is described in SledgePageId.
-    final sledgePageId = new SledgePageId('foo');
+    final sledgePageId = SledgePageId('foo');
     expect(
         sledgePageId.id.id,
         equals([
diff --git a/public/dart/sledge/test/sledge_ss_test.dart b/public/dart/sledge/test/sledge_ss_test.dart
index e19ef86..86d6ae5 100644
--- a/public/dart/sledge/test/sledge_ss_test.dart
+++ b/public/dart/sledge/test/sledge_ss_test.dart
@@ -10,17 +10,17 @@
 
 class SledgeFleetFactory {
   Fleet<Sledge> newFleet(int count) {
-    return new Fleet<Sledge>(count, (index) => newSledgeForTesting());
+    return Fleet<Sledge>(count, (index) => newSledgeForTesting());
   }
 }
 
 void main() async {
-  final Schema nameSchema = new Schema(<String, BaseType>{
-    'name': new LastOneWinsString(),
+  final Schema nameSchema = Schema(<String, BaseType>{
+    'name': LastOneWinsString(),
   });
-  final documentId = new DocumentId(nameSchema);
+  final documentId = DocumentId(nameSchema);
 
-  final sledgeFleetFactory = new SledgeFleetFactory();
+  final sledgeFleetFactory = SledgeFleetFactory();
 
   test('Sledge test with framework. One instance.', () async {
     final fleet = sledgeFleetFactory.newFleet(1)
diff --git a/public/dart/sledge/test/transaction_test.dart b/public/dart/sledge/test/transaction_test.dart
index 2556149..c165cdf 100644
--- a/public/dart/sledge/test/transaction_test.dart
+++ b/public/dart/sledge/test/transaction_test.dart
@@ -34,7 +34,7 @@
     List<int> events = <int>[];
     // ignore: unawaited_futures
     sledge.runInTransaction(() async {
-      await new Future(() => events.add(0));
+      await Future(() => events.add(0));
     });
     expect(events, equals(<int>[]));
     await sledge.runInTransaction(() async {
@@ -45,14 +45,14 @@
 
   test('Check that abortAndRollback works', () async {
     Map<String, BaseType> schemaDescription = <String, BaseType>{
-      'written': new Boolean()
+      'written': Boolean()
     };
-    Schema schema = new Schema(schemaDescription);
+    Schema schema = Schema(schemaDescription);
 
     Sledge sledge = newSledgeForTesting();
     Document doc;
     await sledge.runInTransaction(() async {
-      doc = await sledge.getDocument(new DocumentId(schema));
+      doc = await sledge.getDocument(DocumentId(schema));
       doc['written'].value = false;
     });
     expect(doc['written'].value, equals(false));
@@ -67,14 +67,14 @@
 
   test('Check that exceptions rollback transactions', () async {
     Map<String, BaseType> schemaDescription = <String, BaseType>{
-      'written': new Boolean()
+      'written': Boolean()
     };
-    Schema schema = new Schema(schemaDescription);
+    Schema schema = Schema(schemaDescription);
 
     Sledge sledge = newSledgeForTesting();
     Document doc;
     await sledge.runInTransaction(() async {
-      doc = await sledge.getDocument(new DocumentId(schema));
+      doc = await sledge.getDocument(DocumentId(schema));
       doc['written'].value = false;
     });
     expect(doc['written'].value, equals(false));
diff --git a/public/dart/sledge/test/uint8list_ops_test.dart b/public/dart/sledge/test/uint8list_ops_test.dart
index 6dbd9af..2eb32fe 100644
--- a/public/dart/sledge/test/uint8list_ops_test.dart
+++ b/public/dart/sledge/test/uint8list_ops_test.dart
@@ -11,8 +11,8 @@
 import 'package:test/test.dart';
 
 bool _listsAreEqualHelper(a, b) {
-  final convertedA = new Uint8List.fromList(a);
-  final convertedB = new Uint8List.fromList(b);
+  final convertedA = Uint8List.fromList(a);
+  final convertedB = Uint8List.fromList(b);
   return uint8ListsAreEqual(convertedA, convertedB);
 }
 
@@ -21,9 +21,9 @@
   test('Concatenation of Uint8Lists', () {
     final l1 = [1, 2], l2 = [3, 4, 5], l3 = [6];
     final uint8lConcat = concatListOfUint8Lists([
-      new Uint8List.fromList(l1),
-      new Uint8List.fromList(l2),
-      new Uint8List.fromList(l3)
+      Uint8List.fromList(l1),
+      Uint8List.fromList(l2),
+      Uint8List.fromList(l3)
     ]);
     expect(uint8lConcat.toList(), equals([1, 2, 3, 4, 5, 6]));
   });
@@ -31,10 +31,10 @@
   test('Concatenation of Uint8Lists #2', () {
     final l1 = [1], l2 = [10], l3 = [3], l4 = [6];
     final uint8lConcat = concatListOfUint8Lists([
-      new Uint8List.fromList(l1),
-      new Uint8List.fromList(l2),
-      new Uint8List.fromList(l3),
-      new Uint8List.fromList(l4)
+      Uint8List.fromList(l1),
+      Uint8List.fromList(l2),
+      Uint8List.fromList(l3),
+      Uint8List.fromList(l4)
     ]);
     expect(uint8lConcat.toList(), equals([1, 10, 3, 6]));
   });
@@ -48,7 +48,7 @@
 
   test('listsAreEqual', () {
     expect(uint8ListsAreEqual(null, null), equals(true));
-    expect(uint8ListsAreEqual(new Uint8List.fromList([]), null), equals(false));
+    expect(uint8ListsAreEqual(Uint8List.fromList([]), null), equals(false));
     expect(_listsAreEqualHelper(<int>[], <int>[]), equals(true));
     expect(_listsAreEqualHelper([1], <int>[]), equals(false));
     expect(_listsAreEqualHelper([1], [1]), equals(true));
@@ -58,10 +58,10 @@
 
   test('Ordered map with Uint8List keys of same length', () {
     final orderedMap = newUint8ListOrderedMap<int>();
-    Random rand = new Random();
+    Random rand = Random();
     for (int i = 0; i < 100; i++) {
       int value = rand.nextInt(0xffffffff);
-      Uint8List key = new Uint8List(8)
+      Uint8List key = Uint8List(8)
         ..buffer.asByteData().setUint64(0, value, Endian.big);
       orderedMap[key] = value;
     }
@@ -91,56 +91,56 @@
 
   group('hasPrefix', () {
     test('both empty', () {
-      expect(hasPrefix(new Uint8List(0), new Uint8List(0)), isTrue);
+      expect(hasPrefix(Uint8List(0), Uint8List(0)), isTrue);
     });
 
     test('prefix empty', () {
-      expect(hasPrefix(new Uint8List.fromList([1]), new Uint8List(0)), isTrue);
+      expect(hasPrefix(Uint8List.fromList([1]), Uint8List(0)), isTrue);
     });
 
     test('key empty', () {
-      expect(hasPrefix(new Uint8List(0), new Uint8List.fromList([1])), isFalse);
+      expect(hasPrefix(Uint8List(0), Uint8List.fromList([1])), isFalse);
     });
 
     test('prefix equals to key', () {
       expect(
           hasPrefix(
-              new Uint8List.fromList([1, 3]), new Uint8List.fromList([1, 3])),
+              Uint8List.fromList([1, 3]), Uint8List.fromList([1, 3])),
           isTrue);
     });
 
     test('prefix is a prefix of key', () {
       expect(
-          hasPrefix(new Uint8List.fromList([1, 3, 2, 5]),
-              new Uint8List.fromList([1, 3])),
+          hasPrefix(Uint8List.fromList([1, 3, 2, 5]),
+              Uint8List.fromList([1, 3])),
           isTrue);
     });
 
     test('key is a prefix of prefix', () {
       expect(
-          hasPrefix(new Uint8List.fromList([1, 3]),
-              new Uint8List.fromList([1, 3, 2, 5])),
+          hasPrefix(Uint8List.fromList([1, 3]),
+              Uint8List.fromList([1, 3, 2, 5])),
           isFalse);
     });
 
     test('same length, non equal', () {
       expect(
-          hasPrefix(new Uint8List.fromList([1, 3, 4, 5]),
-              new Uint8List.fromList([1, 3, 2, 5])),
+          hasPrefix(Uint8List.fromList([1, 3, 4, 5]),
+              Uint8List.fromList([1, 3, 2, 5])),
           isFalse);
     });
 
     test('key shorter, not prefix', () {
       expect(
-          hasPrefix(new Uint8List.fromList([1, 2]),
-              new Uint8List.fromList([1, 3, 2, 5])),
+          hasPrefix(Uint8List.fromList([1, 2]),
+              Uint8List.fromList([1, 3, 2, 5])),
           isFalse);
     });
 
     test('prefix shorter, not prefix', () {
       expect(
-          hasPrefix(new Uint8List.fromList([1, 2, 4, 2]),
-              new Uint8List.fromList([1, 3, 1])),
+          hasPrefix(Uint8List.fromList([1, 2, 4, 2]),
+              Uint8List.fromList([1, 3, 1])),
           isFalse);
     });
   });
diff --git a/public/dart/sledge/test/values/compressor_test.dart b/public/dart/sledge/test/values/compressor_test.dart
index a360a0e..78727d3 100644
--- a/public/dart/sledge/test/values/compressor_test.dart
+++ b/public/dart/sledge/test/values/compressor_test.dart
@@ -18,43 +18,43 @@
 
   group('Correct compression', () {
     test('KeyValue', () {
-      final c = new Compressor(), c1 = new Compressor();
-      final kv = new KeyValue(
-          new Uint8List.fromList([1, 2, 3]), new Uint8List.fromList([4, 5]));
+      final c = Compressor(), c1 = Compressor();
+      final kv = KeyValue(
+          Uint8List.fromList([1, 2, 3]), Uint8List.fromList([4, 5]));
       final kv2 = c.uncompressKeyInEntry(c1.compressKeyInEntry(kv));
-      expect(kv2, new KeyValueMatcher(kv));
+      expect(kv2, KeyValueMatcher(kv));
     });
 
     test('Key', () {
-      final c = new Compressor();
-      final key = new Uint8List.fromList([3, 8, 2]);
+      final c = Compressor();
+      final key = Uint8List.fromList([3, 8, 2]);
       final keyUc = c.uncompressKey(c.compressKey(key));
       expect(keyUc, equals(key));
 
-      final keyOth = new Uint8List.fromList([3]);
+      final keyOth = Uint8List.fromList([3]);
       final keyOthUc = c.uncompressKey(c.compressKey(keyOth));
       expect(keyOthUc, equals(keyOth));
     });
   });
 
   group('Exceptions', () {
-    test('Uncompress new key', () {
-      final c = new Compressor(), c1 = new Compressor();
+    test('Uncompress key', () {
+      final c = Compressor(), c1 = Compressor();
       expect(
-          () => c.uncompressKey(c1.compressKey(new Uint8List.fromList([1, 2]))),
+          () => c.uncompressKey(c1.compressKey(Uint8List.fromList([1, 2]))),
           throwsInternalError);
     });
 
     test('Uncompress short key', () {
-      final c = new Compressor();
-      expect(() => c.uncompressKey(new Uint8List.fromList([1, 2])),
+      final c = Compressor();
+      expect(() => c.uncompressKey(Uint8List.fromList([1, 2])),
           throwsInternalError);
     });
 
     test('Uncompress key value with wrong key length', () {
-      final c = new Compressor();
-      final kv = new KeyValue(
-          new Uint8List.fromList([1, 2, 3]), new Uint8List.fromList([4, 5]));
+      final c = Compressor();
+      final kv = KeyValue(
+          Uint8List.fromList([1, 2, 3]), Uint8List.fromList([4, 5]));
       final kvC = c.compressKeyInEntry(kv);
       kvC.value.buffer.asByteData().setUint64(0, 6);
       expect(() => c.uncompressKeyInEntry(kvC), throwsInternalError);
diff --git a/public/dart/sledge/test/values/converter_test.dart b/public/dart/sledge/test/values/converter_test.dart
index f660a5b..e57a262 100644
--- a/public/dart/sledge/test/values/converter_test.dart
+++ b/public/dart/sledge/test/values/converter_test.dart
@@ -13,7 +13,7 @@
 import 'matchers.dart';
 
 void _testSerializationAndDeserialization<T>(T value) {
-  Converter<T> converter = new Converter<T>();
+  Converter<T> converter = Converter<T>();
   expect(converter.deserialize(converter.serialize(value)), equals(value));
 }
 
@@ -24,10 +24,10 @@
 void main() {
   setupLogger();
 
-  final boolConverter = new Converter<bool>();
-  final doubleConverter = new Converter<double>();
-  final numConverter = new Converter<num>();
-  final stringConverter = new Converter<String>();
+  final boolConverter = Converter<bool>();
+  final doubleConverter = Converter<double>();
+  final numConverter = Converter<num>();
+  final stringConverter = Converter<String>();
 
   group('Correct convertions', () {
     test('int converter', () {
@@ -75,19 +75,19 @@
     });
 
     test('data converter', () {
-      final conv = new MapToKVListConverter<String, int>();
-      final longBuffer = new StringBuffer();
+      final conv = MapToKVListConverter<String, int>();
+      final longBuffer = StringBuffer();
       for (int i = 0; i < 100; i++) {
         longBuffer.write('$i');
       }
       final long = longBuffer.toString(), short = 'aba';
-      final change = new ConvertedChange<String, int>({long: 10, short: 1});
+      final change = ConvertedChange<String, int>({long: 10, short: 1});
       final serializedChange = conv.serialize(change);
       expect(serializedChange.changedEntries[0].key.length <= 128 + 1, isTrue);
       final deserializedChange = conv.deserialize(serializedChange);
       expect(deserializedChange.changedEntries[short], equals(1));
       expect(deserializedChange.changedEntries[long], equals(10));
-      final change2 = new ConvertedChange<String, int>(
+      final change2 = ConvertedChange<String, int>(
           <String, int>{}, <String>{short, long});
       final deserializedChange2 = conv.deserialize(conv.serialize(change2));
       expect(deserializedChange2.deletedKeys.length, equals(2));
@@ -98,13 +98,13 @@
 
   group('Exceptions', () {
     test('odd lengthInBytes', () {
-      expect(() => stringConverter.deserialize(new Uint8List(1)),
+      expect(() => stringConverter.deserialize(Uint8List(1)),
           throwsInternalError);
     });
     test("double's length", () {
       for (int i = 0; i < 10; i++) {
         if (i != 8) {
-          expect(() => doubleConverter.deserialize(new Uint8List(i)),
+          expect(() => doubleConverter.deserialize(Uint8List(i)),
               throwsInternalError);
         }
       }
@@ -112,18 +112,18 @@
     test('bool', () {
       for (int i = 0; i < 10; i++) {
         if (i != 1) {
-          expect(() => boolConverter.deserialize(new Uint8List(i)),
+          expect(() => boolConverter.deserialize(Uint8List(i)),
               throwsInternalError);
         }
       }
-      expect(() => boolConverter.deserialize(new Uint8List.fromList([2])),
+      expect(() => boolConverter.deserialize(Uint8List.fromList([2])),
           throwsInternalError);
-      expect(() => boolConverter.deserialize(new Uint8List.fromList([-1])),
+      expect(() => boolConverter.deserialize(Uint8List.fromList([-1])),
           throwsInternalError);
-      expect(boolConverter.deserialize(new Uint8List.fromList([0])),
+      expect(boolConverter.deserialize(Uint8List.fromList([0])),
           equals(false));
       expect(
-          boolConverter.deserialize(new Uint8List.fromList([1])), equals(true));
+          boolConverter.deserialize(Uint8List.fromList([1])), equals(true));
     });
   });
 }
diff --git a/public/dart/sledge/test/values/key_value_storage_test.dart b/public/dart/sledge/test/values/key_value_storage_test.dart
index 42fcbd4..1e85a9f 100644
--- a/public/dart/sledge/test/values/key_value_storage_test.dart
+++ b/public/dart/sledge/test/values/key_value_storage_test.dart
@@ -13,13 +13,13 @@
   setupLogger();
 
   group('Map API coverage', () {
-    new MapApiTester<KeyValueStorage>(() => new KeyValueStorage<int, int>())
+    MapApiTester<KeyValueStorage>(() => KeyValueStorage<int, int>())
       ..testApi()
       ..testObserver();
   });
 
   test('getChange', () {
-    KeyValueStorage kv = new KeyValueStorage<int, int>();
+    KeyValueStorage kv = KeyValueStorage<int, int>();
     expect(kv.length, equals(0));
     kv[0] = 2;
     expect(kv[0], equals(2));
@@ -30,8 +30,8 @@
   });
 
   test('getChange + applyChange', () {
-    KeyValueStorage kv1 = new KeyValueStorage<int, int>(),
-        kv2 = new KeyValueStorage<int, int>();
+    KeyValueStorage kv1 = KeyValueStorage<int, int>(),
+        kv2 = KeyValueStorage<int, int>();
     kv1[0] = 2;
     kv2.applyChange(kv1.getChange());
     expect(kv2[0], equals(2));
diff --git a/public/dart/sledge/test/values/last_one_wins_values_test.dart b/public/dart/sledge/test/values/last_one_wins_values_test.dart
index 64c9281..6c211e9 100644
--- a/public/dart/sledge/test/values/last_one_wins_values_test.dart
+++ b/public/dart/sledge/test/values/last_one_wins_values_test.dart
@@ -18,7 +18,7 @@
   setupLogger();
 
   test('Integer', () {
-    final cnt = new LastOneWinsValue<int>();
+    final cnt = LastOneWinsValue<int>();
     expect(cnt.value, equals(0));
     cnt.value = 3;
     expect(cnt.value, equals(3));
@@ -27,7 +27,7 @@
   });
 
   test('Double', () {
-    final cnt = new LastOneWinsValue<double>();
+    final cnt = LastOneWinsValue<double>();
     expect(cnt.value, equals(0.0));
     cnt.value = 3.5;
     expect(cnt.value, equals(3.5));
@@ -36,7 +36,7 @@
   });
 
   test('Boolean', () {
-    final cnt = new LastOneWinsValue<bool>();
+    final cnt = LastOneWinsValue<bool>();
     expect(cnt.value, equals(false));
     cnt.value = true;
     expect(cnt.value, equals(true));
@@ -45,7 +45,7 @@
   });
 
   test('String', () {
-    final cnt = new LastOneWinsValue<String>();
+    final cnt = LastOneWinsValue<String>();
     expect(cnt.value, equals(''));
     cnt.value = 'aba';
     expect(cnt.value, equals('aba'));
@@ -54,20 +54,20 @@
   });
 
   test('Uint8List', () {
-    final cnt = new LastOneWinsValue<Uint8List>();
-    expect(cnt.value, equals(new Uint8List(0)));
-    cnt.value = new Uint8List.fromList([1, 2, 3]);
-    expect(cnt.value, equals(new Uint8List.fromList([1, 2, 3])));
-    cnt.value = new Uint8List.fromList([2, 5, 3]);
-    expect(cnt.value, equals(new Uint8List.fromList([2, 5, 3])));
+    final cnt = LastOneWinsValue<Uint8List>();
+    expect(cnt.value, equals(Uint8List(0)));
+    cnt.value = Uint8List.fromList([1, 2, 3]);
+    expect(cnt.value, equals(Uint8List.fromList([1, 2, 3])));
+    cnt.value = Uint8List.fromList([2, 5, 3]);
+    expect(cnt.value, equals(Uint8List.fromList([2, 5, 3])));
   });
 
   test('Integer oprations', () {
-    final conv = new MapToKVListConverter<int, int>();
-    final x = new LastOneWinsValue<int>(
-        conv.serialize(new ConvertedChange<int, int>({0: -3})));
+    final conv = MapToKVListConverter<int, int>();
+    final x = LastOneWinsValue<int>(
+        conv.serialize(ConvertedChange<int, int>({0: -3})));
     expect(x.value, equals(-3));
-    x.applyChange(conv.serialize(new ConvertedChange<int, int>({0: 5})));
+    x.applyChange(conv.serialize(ConvertedChange<int, int>({0: 5})));
     expect(x.value, equals(5));
     x.value = 2;
     expect(x.value, equals(2));
@@ -75,16 +75,16 @@
     expect(x.value, equals(-1));
     x.getChange();
     expect(x.value, equals(-1));
-    x.applyChange(conv.serialize(new ConvertedChange<int, int>({0: 4})));
+    x.applyChange(conv.serialize(ConvertedChange<int, int>({0: 4})));
     expect(x.value, equals(4));
   });
 
   test('Double operations', () {
-    final conv = new MapToKVListConverter<int, double>();
-    final x = new LastOneWinsValue<double>(
-        conv.serialize(new ConvertedChange<int, double>({0: -3.5})));
+    final conv = MapToKVListConverter<int, double>();
+    final x = LastOneWinsValue<double>(
+        conv.serialize(ConvertedChange<int, double>({0: -3.5})));
     expect(x.value, equals(-3.5));
-    x.applyChange(conv.serialize(new ConvertedChange<int, double>({0: 4.2})));
+    x.applyChange(conv.serialize(ConvertedChange<int, double>({0: 4.2})));
     expect(x.value, equals(4.2));
     x.value = 0.5;
     expect(x.value, equals(0.5));
@@ -92,16 +92,16 @@
     expect(x.value, equals(-1.0));
     x.getChange();
     expect(x.value, equals(-1.0));
-    x.applyChange(conv.serialize(new ConvertedChange<int, double>({0: 4.25})));
+    x.applyChange(conv.serialize(ConvertedChange<int, double>({0: 4.25})));
     expect(x.value, equals(4.25));
   });
 
   test('String operations', () {
-    final conv = new MapToKVListConverter<int, String>();
-    final x = new LastOneWinsValue<String>(
-        conv.serialize(new ConvertedChange<int, String>({0: 'bar'})));
+    final conv = MapToKVListConverter<int, String>();
+    final x = LastOneWinsValue<String>(
+        conv.serialize(ConvertedChange<int, String>({0: 'bar'})));
     expect(x.value, equals('bar'));
-    x.applyChange(conv.serialize(new ConvertedChange<int, String>({0: 'foo'})));
+    x.applyChange(conv.serialize(ConvertedChange<int, String>({0: 'foo'})));
     expect(x.value, equals('foo'));
     x.value = 'bar';
     expect(x.value, equals('bar'));
@@ -109,42 +109,42 @@
     expect(x.value, equals('tor'));
     x.getChange();
     expect(x.value, equals('tor'));
-    x.applyChange(conv.serialize(new ConvertedChange<int, String>({0: 'cir'})));
+    x.applyChange(conv.serialize(ConvertedChange<int, String>({0: 'cir'})));
     expect(x.value, equals('cir'));
   });
 
   test('Boolean operations', () {
-    final conv = new MapToKVListConverter<int, bool>();
-    final x = new LastOneWinsValue<bool>(
-        conv.serialize(new ConvertedChange<int, bool>({0: true})));
+    final conv = MapToKVListConverter<int, bool>();
+    final x = LastOneWinsValue<bool>(
+        conv.serialize(ConvertedChange<int, bool>({0: true})));
     expect(x.value, equals(true));
-    x.applyChange(conv.serialize(new ConvertedChange<int, bool>({0: false})));
+    x.applyChange(conv.serialize(ConvertedChange<int, bool>({0: false})));
     expect(x.value, equals(false));
     x.value = true;
     expect(x.value, equals(true));
     x.getChange();
     expect(x.value, equals(true));
-    x.applyChange(conv.serialize(new ConvertedChange<int, bool>({0: false})));
+    x.applyChange(conv.serialize(ConvertedChange<int, bool>({0: false})));
     expect(x.value, equals(false));
   });
 
   test('onChange stream', () {
-    final conv = new MapToKVListConverter<int, String>();
-    final x = new LastOneWinsValue<String>(
-        conv.serialize(new ConvertedChange<int, String>({0: 'aba'})));
+    final conv = MapToKVListConverter<int, String>();
+    final x = LastOneWinsValue<String>(
+        conv.serialize(ConvertedChange<int, String>({0: 'aba'})));
     Stream<String> changeStream = x.onChange;
     expect(changeStream, emitsInOrder(['bar', 'foo', 'a']));
     x
       ..applyChange(
-          conv.serialize(new ConvertedChange<int, String>({0: 'bar'})))
+          conv.serialize(ConvertedChange<int, String>({0: 'bar'})))
       ..applyChange(
-          conv.serialize(new ConvertedChange<int, String>({0: 'foo'})))
-      ..applyChange(conv.serialize(new ConvertedChange<int, String>({0: 'a'})));
+          conv.serialize(ConvertedChange<int, String>({0: 'foo'})))
+      ..applyChange(conv.serialize(ConvertedChange<int, String>({0: 'a'})));
   });
 
   test('Observer calls', () {
-    final x = new LastOneWinsValue<String>();
-    final observer = new DummyValueObserver();
+    final x = LastOneWinsValue<String>();
+    final observer = DummyValueObserver();
     x.observer = observer;
     expect(x.value, equals(''));
     observer.expectNotChanged();
diff --git a/public/dart/sledge/test/values/list_api_tester.dart b/public/dart/sledge/test/values/list_api_tester.dart
index 3c95e2c..e2e99fd 100644
--- a/public/dart/sledge/test/values/list_api_tester.dart
+++ b/public/dart/sledge/test/values/list_api_tester.dart
@@ -639,7 +639,7 @@
   void testObserver() {
     test('Observer calls.', () {
       final list = _newList();
-      final observer = new DummyValueObserver();
+      final observer = DummyValueObserver();
       expect(list, const TypeMatcher<LeafValue>());
       dynamic leafValue = list;
       leafValue.observer = observer; // ignore: cascade_invocations
@@ -676,7 +676,7 @@
         ..expectChanged()
         ..reset();
 
-      list.shuffle(new Random(1));
+      list.shuffle(Random(1));
       observer
         ..expectChanged()
         ..reset();
diff --git a/public/dart/sledge/test/values/map_api_tester.dart b/public/dart/sledge/test/values/map_api_tester.dart
index ce3f5d8..05cded6 100644
--- a/public/dart/sledge/test/values/map_api_tester.dart
+++ b/public/dart/sledge/test/values/map_api_tester.dart
@@ -163,7 +163,7 @@
   void testObserver() {
     test('Observer calls.', () {
       final dynamic map = _mapCreator();
-      final observer = new DummyValueObserver();
+      final observer = DummyValueObserver();
       map.observer = observer;
       expect(map.containsKey(0), equals(false));
       observer.expectNotChanged();
diff --git a/public/dart/sledge/test/values/map_value_ss_test.dart b/public/dart/sledge/test/values/map_value_ss_test.dart
index b22c8d8..53d4f80 100644
--- a/public/dart/sledge/test/values/map_value_ss_test.dart
+++ b/public/dart/sledge/test/values/map_value_ss_test.dart
@@ -16,12 +16,12 @@
 
   // Returns Fleet of [count] MapValues.
   Fleet<MapValue<K, V>> newFleet(int count) {
-    return new Fleet<MapValue<K, V>>(count, (index) => new MapValue<K, V>());
+    return Fleet<MapValue<K, V>>(count, (index) => MapValue<K, V>());
   }
 }
 
 const MapFleetFactory<int, int> intMapFleetFactory =
-    const MapFleetFactory<int, int>();
+    MapFleetFactory<int, int>();
 
 void main() async {
   setupLogger();
diff --git a/public/dart/sledge/test/values/map_value_test.dart b/public/dart/sledge/test/values/map_value_test.dart
index cae1717..5b7d10f 100644
--- a/public/dart/sledge/test/values/map_value_test.dart
+++ b/public/dart/sledge/test/values/map_value_test.dart
@@ -13,13 +13,13 @@
   setupLogger();
 
   group('Map API coverage', () {
-    new MapApiTester<MapValue>(() => new MapValue<int, int>())
+    MapApiTester<MapValue>(() => MapValue<int, int>())
       ..testApi()
       ..testObserver();
   });
 
   test('MapValue get and set.', () {
-    var m = new MapValue<int, int>();
+    var m = MapValue<int, int>();
     expect(m[0], equals(null));
     expect(m[3], equals(null));
     m[2] = 1;
@@ -32,7 +32,7 @@
   });
 
   test('MapValue get, set and remove.', () {
-    var m = new MapValue<int, int>();
+    var m = MapValue<int, int>();
     expect(m[0], equals(null));
     m[0] = 3;
     expect(m[0], equals(3));
diff --git a/public/dart/sledge/test/values/matchers.dart b/public/dart/sledge/test/values/matchers.dart
index f217661..05e7fc7 100644
--- a/public/dart/sledge/test/values/matchers.dart
+++ b/public/dart/sledge/test/values/matchers.dart
@@ -12,7 +12,7 @@
 import 'package:sledge/src/sledge_errors.dart';
 import 'package:test/test.dart';
 
-const Equality<List<int>> _listEquality = const ListEquality<int>();
+const Equality<List<int>> _listEquality = ListEquality<int>();
 
 class KeyValueEquality implements Equality<KeyValue> {
   // Default constructor;
@@ -35,11 +35,11 @@
   }
 }
 
-const _keyValueEquality = const KeyValueEquality();
+const _keyValueEquality = KeyValueEquality();
 const ListEquality _keyValueListEquality =
-    const ListEquality<KeyValue>(_keyValueEquality);
+    ListEquality<KeyValue>(_keyValueEquality);
 const ListEquality _keysListEquality =
-    const ListEquality<List<int>>(_listEquality);
+    ListEquality<List<int>>(_listEquality);
 
 class KeyValueMatcher extends Matcher {
   final KeyValue _kv;
@@ -98,4 +98,4 @@
 
 /// Matcher for InternalSledgeErrors.
 final Matcher throwsInternalError =
-    throwsA(new TypeMatcher<InternalSledgeError>());
+    throwsA(TypeMatcher<InternalSledgeError>());
diff --git a/public/dart/sledge/test/values/ordered_list_ss_test.dart b/public/dart/sledge/test/values/ordered_list_ss_test.dart
index 7aeab4b..356c3bb 100644
--- a/public/dart/sledge/test/values/ordered_list_ss_test.dart
+++ b/public/dart/sledge/test/values/ordered_list_ss_test.dart
@@ -24,13 +24,13 @@
   // Returns Fleet of [count] OrderedListValues with pairwise different
   // instanceIds.
   Fleet<OrderedListValue<T>> newFleet(int count) {
-    return new Fleet<OrderedListValue<T>>(count,
-        (index) => new OrderedListValue<T>(new Uint8List.fromList([index])));
+    return Fleet<OrderedListValue<T>>(count,
+        (index) => OrderedListValue<T>(Uint8List.fromList([index])));
   }
 }
 
 const OrderedListFleetFactory<int> integerOrderedListFleetFactory =
-    const OrderedListFleetFactory<int>();
+    OrderedListFleetFactory<int>();
 
 // Checks that relative orders of elements do not change.
 // Throws an error if some pair of elements [a] and [b] appear in both orders,
@@ -83,11 +83,11 @@
       'Check relative order '
       '(i: $countInstances, e: $countEpochs, ins: $countInsertions, seed: $seed).',
       () async {
-    final random = new Random(seed);
+    final random = Random(seed);
     int incValue = 0;
     final fleet = integerOrderedListFleetFactory.newFleet(countInstances);
     final instanceIdList =
-        new List<int>.generate(countInstances, (index) => index);
+        List<int>.generate(countInstances, (index) => index);
 
     for (int epoch = 0; epoch < countEpochs; epoch++) {
       for (int instance = 0; instance < countInstances; instance++) {
@@ -100,7 +100,7 @@
       }
       fleet.synchronize(instanceIdList);
     }
-    fleet.addChecker(() => new RelativeOrderChecker<int>());
+    fleet.addChecker(() => RelativeOrderChecker<int>());
     await fleet.testAllOrders();
   });
 }
@@ -135,7 +135,7 @@
         l2..insert(0, 5)..insert(1, 6);
       })
       ..synchronize([0, 1, 2])
-      ..addChecker(() => new RelativeOrderChecker<int>());
+      ..addChecker(() => RelativeOrderChecker<int>());
     await fleet.testAllOrders();
   });
 
@@ -161,14 +161,14 @@
         expect(
             cnt.onChange,
             emitsInOrder([
-              new OrderedListChangeMatcher(new OrderedListChange<int>(
-                  [], new SplayTreeMap<int, int>.fromIterables([0], [1]))),
-              new OrderedListChangeMatcher(new OrderedListChange<int>([],
-                  new SplayTreeMap<int, int>.fromIterables([0, 2], [2, 3]))),
-              new OrderedListChangeMatcher(new OrderedListChange<int>(
-                  [1, 2], new SplayTreeMap<int, int>.fromIterables([], []))),
-              new OrderedListChangeMatcher(new OrderedListChange<int>(
-                  [], new SplayTreeMap<int, int>.fromIterables([0], [5]))),
+              OrderedListChangeMatcher(OrderedListChange<int>(
+                  [], SplayTreeMap<int, int>.fromIterables([0], [1]))),
+              OrderedListChangeMatcher(OrderedListChange<int>([],
+                  SplayTreeMap<int, int>.fromIterables([0, 2], [2, 3]))),
+              OrderedListChangeMatcher(OrderedListChange<int>(
+                  [1, 2], SplayTreeMap<int, int>.fromIterables([], []))),
+              OrderedListChangeMatcher(OrderedListChange<int>(
+                  [], SplayTreeMap<int, int>.fromIterables([0], [5]))),
             ]));
       });
     }
diff --git a/public/dart/sledge/test/values/ordered_list_tree_path_test.dart b/public/dart/sledge/test/values/ordered_list_tree_path_test.dart
index 3ac105e..1763656 100644
--- a/public/dart/sledge/test/values/ordered_list_tree_path_test.dart
+++ b/public/dart/sledge/test/values/ordered_list_tree_path_test.dart
@@ -13,7 +13,7 @@
   int _incrementalTime = 0;
   Uint8List get timestamp {
     _incrementalTime += 1;
-    return new Uint8List(8)..buffer.asByteData().setUint64(0, _incrementalTime);
+    return Uint8List(8)..buffer.asByteData().setUint64(0, _incrementalTime);
   }
 }
 
@@ -21,8 +21,8 @@
   setupLogger();
 
   test('isDescendant.', () {
-    var time = new IncrementalTime();
-    var root = new OrderedListTreePath.root();
+    var time = IncrementalTime();
+    var root = OrderedListTreePath.root();
     expect(root.isDescendant(root), isFalse);
 
     // root -
@@ -30,7 +30,7 @@
     //      - - -> p(v1) - - -> v1
 
     var v1 = root.getChild(
-        ChildType.right, new Uint8List.fromList([1]), time.timestamp);
+        ChildType.right, Uint8List.fromList([1]), time.timestamp);
     expect(v1.isDescendant(root), isTrue);
     expect(v1.isDescendant(v1), isFalse);
     expect(root.isDescendant(v1), isFalse);
@@ -42,7 +42,7 @@
     //      - - -> p(v2) - - -> v2
 
     var v2 = root.getChild(
-        ChildType.right, new Uint8List.fromList([2]), time.timestamp);
+        ChildType.right, Uint8List.fromList([2]), time.timestamp);
     expect(v2.isDescendant(root), isTrue);
     expect(v2.isDescendant(v2), isFalse);
     expect(v1.isDescendant(v2), isFalse);
@@ -55,7 +55,7 @@
     //      -----> p(v2) -----> v2
 
     var v3 = v1.getChild(
-        ChildType.left, new Uint8List.fromList([0, 1, 2]), time.timestamp);
+        ChildType.left, Uint8List.fromList([0, 1, 2]), time.timestamp);
     expect(v3.isDescendant(root), isTrue);
     expect(v3.isDescendant(v1), isTrue);
     expect(v3.isDescendant(v2), isFalse);
diff --git a/public/dart/sledge/test/values/ordered_list_value_test.dart b/public/dart/sledge/test/values/ordered_list_value_test.dart
index 8c4379f..8fe61a9 100644
--- a/public/dart/sledge/test/values/ordered_list_value_test.dart
+++ b/public/dart/sledge/test/values/ordered_list_value_test.dart
@@ -16,27 +16,27 @@
 void main() {
   setupLogger();
 
-  final id1 = new Uint8List.fromList([1]);
+  final id1 = Uint8List.fromList([1]);
 
   group('List API coverage', () {
-    new ListApiTester<OrderedListValue, int>(
-        () => new OrderedListValue<int>(id1), (int id) => id)
+    ListApiTester<OrderedListValue, int>(
+        () => OrderedListValue<int>(id1), (int id) => id)
       ..testApi()
       ..testObserver();
-    new ListApiTester<OrderedListValue, String>(
-        () => new OrderedListValue<String>(id1), (int id) => id.toString())
+    ListApiTester<OrderedListValue, String>(
+        () => OrderedListValue<String>(id1), (int id) => id.toString())
       ..testApi()
       ..testObserver();
-    new ListApiTester<OrderedListValue, Uint8List>(
-        () => new OrderedListValue<Uint8List>(id1,
-            equals: new ListEquality().equals),
-        (int id) => new Uint8List.fromList([id]))
+    ListApiTester<OrderedListValue, Uint8List>(
+        () => OrderedListValue<Uint8List>(id1,
+            equals: ListEquality().equals),
+        (int id) => Uint8List.fromList([id]))
       ..testApi()
       ..testObserver();
   });
 
   test('Add to end of list and check content.', () {
-    var s = new OrderedListValue<int>(id1);
+    var s = OrderedListValue<int>(id1);
     expect(s.toList(), equals([]));
     s.insert(0, 1);
     expect(s.toList(), equals([1]));
@@ -47,7 +47,7 @@
   });
 
   test('Insert into random positions of list and check content.', () {
-    var s = new OrderedListValue<int>(id1);
+    var s = OrderedListValue<int>(id1);
     expect(s.toList(), equals([]));
     s.insert(0, 1);
     expect(s.toList(), equals([1]));
@@ -62,7 +62,7 @@
   });
 
   test('Insert into random positions, delete from list and check content.', () {
-    var s = new OrderedListValue<int>(id1);
+    var s = OrderedListValue<int>(id1);
     expect(s.toList(), equals([]));
     s.insert(0, 1);
     expect(s.toList(), equals([1]));
@@ -83,7 +83,7 @@
   });
 
   test('Simple operations.', () {
-    var s = new OrderedListValue<int>(id1);
+    var s = OrderedListValue<int>(id1);
     expect(s.toList(), equals([]));
     s.insert(0, 1);
     expect(s[0], equals(1));
@@ -101,7 +101,7 @@
 
   group('Exceptions', () {
     test('Insert out of range', () {
-      var s = new OrderedListValue<int>(id1);
+      var s = OrderedListValue<int>(id1);
       expect(() => s.insert(1, 1), throwsRangeError);
       s.insert(0, 1);
       expect(() => s.insert(2, 0), throwsRangeError);
@@ -109,7 +109,7 @@
     });
 
     test('[] out of range', () {
-      var s = new OrderedListValue<int>(id1);
+      var s = OrderedListValue<int>(id1);
       expect(() => s[1], throwsRangeError);
       expect(() => s[4], throwsRangeError);
       s.insert(0, 1);
@@ -118,7 +118,7 @@
     });
 
     test('Remove out of range', () {
-      var s = new OrderedListValue<int>(id1);
+      var s = OrderedListValue<int>(id1);
       expect(() => s.removeAt(0), throwsRangeError);
       expect(() => s.removeAt(1), throwsRangeError);
       s.insert(0, 1);
@@ -130,8 +130,8 @@
 
   test('Insert into random positions of list and check content. Large test.',
       () {
-    final random = new Random(1);
-    var s = new OrderedListValue<int>(id1);
+    final random = Random(1);
+    var s = OrderedListValue<int>(id1);
     var list = <int>[];
     expect(s.toList(), equals(<int>[]));
     for (int value = 0; value < 100; value++) {
@@ -143,7 +143,7 @@
   });
 
   test('Complex example of inserting in the list.', () {
-    var s = new OrderedListValue<int>(id1)
+    var s = OrderedListValue<int>(id1)
       ..insert(0, 0)
       ..insert(0, 1)
       ..insert(1, 2)
diff --git a/public/dart/sledge/test/values/pos_neg_counter_ss_test.dart b/public/dart/sledge/test/values/pos_neg_counter_ss_test.dart
index 689a1d3..6e90961 100644
--- a/public/dart/sledge/test/values/pos_neg_counter_ss_test.dart
+++ b/public/dart/sledge/test/values/pos_neg_counter_ss_test.dart
@@ -16,24 +16,24 @@
   const PosNegCounterFleetFactory();
 
   Fleet<PosNegCounterValue<T>> newFleet(int count) {
-    return new Fleet<PosNegCounterValue<T>>(count,
-        (index) => new PosNegCounterValue<T>(new Uint8List.fromList([index])));
+    return Fleet<PosNegCounterValue<T>>(count,
+        (index) => PosNegCounterValue<T>(Uint8List.fromList([index])));
   }
 }
 
 const PosNegCounterFleetFactory<int> integerCounterFleetFactory =
-    const PosNegCounterFleetFactory<int>();
+    PosNegCounterFleetFactory<int>();
 
 void main() async {
   setupLogger();
 
   test('PosNegCounterValue with StorageState', () {
-    var cnt1 = new PosNegCounterValue<int>(new Uint8List.fromList([1])),
-        cnt2 = new PosNegCounterValue<int>(new Uint8List.fromList([2])),
-        cnt3 = new PosNegCounterValue<int>(new Uint8List.fromList([3]));
-    var ss1 = new StorageState(),
-        ss2 = new StorageState(),
-        ss3 = new StorageState();
+    var cnt1 = PosNegCounterValue<int>(Uint8List.fromList([1])),
+        cnt2 = PosNegCounterValue<int>(Uint8List.fromList([2])),
+        cnt3 = PosNegCounterValue<int>(Uint8List.fromList([3]));
+    var ss1 = StorageState(),
+        ss2 = StorageState(),
+        ss3 = StorageState();
     cnt1.add(4);
     cnt2.add(2);
     ss1.applyChange(cnt1.getChange(), 1);
diff --git a/public/dart/sledge/test/values/pos_neg_counter_test.dart b/public/dart/sledge/test/values/pos_neg_counter_test.dart
index fcd359f..924631d 100644
--- a/public/dart/sledge/test/values/pos_neg_counter_test.dart
+++ b/public/dart/sledge/test/values/pos_neg_counter_test.dart
@@ -21,10 +21,10 @@
 void main() {
   setupLogger();
 
-  final id1 = new Uint8List.fromList([1]);
+  final id1 = Uint8List.fromList([1]);
 
   test('PosNegCounterValue accumulate additions', () {
-    final cnt = new PosNegCounterValue<int>(id1);
+    final cnt = PosNegCounterValue<int>(id1);
     expect(cnt.value, equals(0));
     cnt.add(1);
     expect(cnt.value, equals(1));
@@ -35,7 +35,7 @@
   });
 
   test('PosNegCounterValue accumulate subtractions', () {
-    final cnt = new PosNegCounterValue<int>(id1);
+    final cnt = PosNegCounterValue<int>(id1);
     expect(cnt.value, equals(0));
     cnt.add(-1);
     expect(cnt.value, equals(-1));
@@ -46,7 +46,7 @@
   });
 
   test('PosNegCounterValue accumulate', () {
-    final cnt = new PosNegCounterValue<int>(id1);
+    final cnt = PosNegCounterValue<int>(id1);
     expect(cnt.value, equals(0));
     cnt.add(-3);
     expect(cnt.value, equals(-3));
@@ -57,7 +57,7 @@
   });
 
   test('PosNegCounterValue accumulate', () {
-    final cnt = new PosNegCounterValue<double>(id1);
+    final cnt = PosNegCounterValue<double>(id1);
     expect(cnt.value, equals(0.0));
     cnt.add(-3.2);
     expect(cnt.value, equals(-3.2));
@@ -68,75 +68,75 @@
   });
 
   test('PosNegCounterValue construction', () {
-    final conv = new MapToKVListConverter<Uint8List, int>();
-    final cnt = new PosNegCounterValue<int>(id1)
-      ..applyChange(conv.serialize(new ConvertedChange<Uint8List, int>(
+    final conv = MapToKVListConverter<Uint8List, int>();
+    final cnt = PosNegCounterValue<int>(id1)
+      ..applyChange(conv.serialize(ConvertedChange<Uint8List, int>(
           _newIntMap()
-            ..putIfAbsent(new Uint8List.fromList([0, 1]), () => 4)
-            ..putIfAbsent(new Uint8List.fromList([1, 1]), () => 3))));
+            ..putIfAbsent(Uint8List.fromList([0, 1]), () => 4)
+            ..putIfAbsent(Uint8List.fromList([1, 1]), () => 3))));
     expect(cnt.value, equals(1));
   });
 
   test('PosNegCounterValue construction 2', () {
-    final conv = new MapToKVListConverter<Uint8List, int>();
-    final cnt = new PosNegCounterValue<int>(id1)
-      ..applyChange(conv.serialize(new ConvertedChange<Uint8List, int>(
+    final conv = MapToKVListConverter<Uint8List, int>();
+    final cnt = PosNegCounterValue<int>(id1)
+      ..applyChange(conv.serialize(ConvertedChange<Uint8List, int>(
           _newIntMap()
-            ..putIfAbsent(new Uint8List.fromList([0, 1]), () => 4)
-            ..putIfAbsent(new Uint8List.fromList([1, 1]), () => 3)
-            ..putIfAbsent(new Uint8List.fromList([0, 3]), () => 5)
-            ..putIfAbsent(new Uint8List.fromList([1, 3]), () => 2))));
+            ..putIfAbsent(Uint8List.fromList([0, 1]), () => 4)
+            ..putIfAbsent(Uint8List.fromList([1, 1]), () => 3)
+            ..putIfAbsent(Uint8List.fromList([0, 3]), () => 5)
+            ..putIfAbsent(Uint8List.fromList([1, 3]), () => 2))));
     expect(cnt.value, equals(4));
   });
 
   test('PosNegCounterValue construction double', () {
-    final conv = new MapToKVListConverter<Uint8List, double>();
-    final cnt = new PosNegCounterValue<double>(id1)
-      ..applyChange(conv.serialize(new ConvertedChange<Uint8List, double>(
+    final conv = MapToKVListConverter<Uint8List, double>();
+    final cnt = PosNegCounterValue<double>(id1)
+      ..applyChange(conv.serialize(ConvertedChange<Uint8List, double>(
           newUint8ListMap<double>()
-            ..putIfAbsent(new Uint8List.fromList([0, 1]), () => 4.25)
-            ..putIfAbsent(new Uint8List.fromList([1, 1]), () => 3.0)
-            ..putIfAbsent(new Uint8List.fromList([0, 3]), () => 2.5)
-            ..putIfAbsent(new Uint8List.fromList([1, 4]), () => 4.125))));
+            ..putIfAbsent(Uint8List.fromList([0, 1]), () => 4.25)
+            ..putIfAbsent(Uint8List.fromList([1, 1]), () => 3.0)
+            ..putIfAbsent(Uint8List.fromList([0, 3]), () => 2.5)
+            ..putIfAbsent(Uint8List.fromList([1, 4]), () => 4.125))));
     expect(cnt.value, equals(-0.375));
   });
 
   test('PosNegCounterValue applyChange', () {
-    final conv = new MapToKVListConverter<Uint8List, int>();
-    final cnt = new PosNegCounterValue<int>(id1);
+    final conv = MapToKVListConverter<Uint8List, int>();
+    final cnt = PosNegCounterValue<int>(id1);
     expect(cnt.value, equals(0));
-    cnt.applyChange(conv.serialize(new ConvertedChange<Uint8List, int>(
-        _newIntMap()..putIfAbsent(new Uint8List.fromList([0, 1]), () => 4))));
+    cnt.applyChange(conv.serialize(ConvertedChange<Uint8List, int>(
+        _newIntMap()..putIfAbsent(Uint8List.fromList([0, 1]), () => 4))));
     expect(cnt.value, equals(4));
-    cnt.applyChange(conv.serialize(new ConvertedChange<Uint8List, int>(
-        _newIntMap()..putIfAbsent(new Uint8List.fromList([0, 1]), () => 1))));
+    cnt.applyChange(conv.serialize(ConvertedChange<Uint8List, int>(
+        _newIntMap()..putIfAbsent(Uint8List.fromList([0, 1]), () => 1))));
     expect(cnt.value, equals(1));
-    cnt.applyChange(conv.serialize(new ConvertedChange<Uint8List, int>(
-        _newIntMap()..putIfAbsent(new Uint8List.fromList([1, 2]), () => 5))));
+    cnt.applyChange(conv.serialize(ConvertedChange<Uint8List, int>(
+        _newIntMap()..putIfAbsent(Uint8List.fromList([1, 2]), () => 5))));
     expect(cnt.value, equals(-4));
   });
 
   test('PosNegCounterValue onChange stream', () {
-    final conv = new MapToKVListConverter<Uint8List, int>();
-    final cnt = new PosNegCounterValue<int>(id1)
-      ..applyChange(conv.serialize(new ConvertedChange<Uint8List, int>(
+    final conv = MapToKVListConverter<Uint8List, int>();
+    final cnt = PosNegCounterValue<int>(id1)
+      ..applyChange(conv.serialize(ConvertedChange<Uint8List, int>(
           _newIntMap()
-            ..putIfAbsent(new Uint8List.fromList([0, 1]), () => 1)
-            ..putIfAbsent(new Uint8List.fromList([1, 1]), () => 2))));
+            ..putIfAbsent(Uint8List.fromList([0, 1]), () => 1)
+            ..putIfAbsent(Uint8List.fromList([1, 1]), () => 2))));
     Stream<int> changeStream = cnt.onChange;
     expect(changeStream, emitsInOrder([2, 4, -3]));
     cnt
-      ..applyChange(conv.serialize(new ConvertedChange<Uint8List, int>(
-          _newIntMap()..putIfAbsent(new Uint8List.fromList([0, 2]), () => 3))))
-      ..applyChange(conv.serialize(new ConvertedChange<Uint8List, int>(
-          _newIntMap()..putIfAbsent(new Uint8List.fromList([0, 1]), () => 3))))
-      ..applyChange(conv.serialize(new ConvertedChange<Uint8List, int>(
-          _newIntMap()..putIfAbsent(new Uint8List.fromList([1, 1]), () => 9))));
+      ..applyChange(conv.serialize(ConvertedChange<Uint8List, int>(
+          _newIntMap()..putIfAbsent(Uint8List.fromList([0, 2]), () => 3))))
+      ..applyChange(conv.serialize(ConvertedChange<Uint8List, int>(
+          _newIntMap()..putIfAbsent(Uint8List.fromList([0, 1]), () => 3))))
+      ..applyChange(conv.serialize(ConvertedChange<Uint8List, int>(
+          _newIntMap()..putIfAbsent(Uint8List.fromList([1, 1]), () => 9))));
   });
 
   test('Observer calls.', () {
-    final cnt = new PosNegCounterValue<int>(id1);
-    final observer = new DummyValueObserver();
+    final cnt = PosNegCounterValue<int>(id1);
+    final observer = DummyValueObserver();
     cnt.observer = observer;
     expect(cnt.value, equals(0));
     observer.expectNotChanged();
diff --git a/public/dart/sledge/test/values/set_api_tester.dart b/public/dart/sledge/test/values/set_api_tester.dart
index dedf0c9..1b68c4b 100644
--- a/public/dart/sledge/test/values/set_api_tester.dart
+++ b/public/dart/sledge/test/values/set_api_tester.dart
@@ -221,7 +221,7 @@
   void testObserver() {
     test('Observer calls.', () {
       final s = _setCreator();
-      final observer = new DummyValueObserver();
+      final observer = DummyValueObserver();
       expect(s, const TypeMatcher<LeafValue>());
       dynamic leafValue = s;
       leafValue.observer = observer; // ignore: cascade_invocations
diff --git a/public/dart/sledge/test/values/set_value_ss_test.dart b/public/dart/sledge/test/values/set_value_ss_test.dart
index 27f271e..ead90e7 100644
--- a/public/dart/sledge/test/values/set_value_ss_test.dart
+++ b/public/dart/sledge/test/values/set_value_ss_test.dart
@@ -16,11 +16,11 @@
 
   // Returns Fleet of [count] SetValues.
   Fleet<SetValue<E>> newFleet(int count) {
-    return new Fleet<SetValue<E>>(count, (index) => new SetValue<E>());
+    return Fleet<SetValue<E>>(count, (index) => SetValue<E>());
   }
 }
 
-const SetFleetFactory<int> intSetFleetFactory = const SetFleetFactory<int>();
+const SetFleetFactory<int> intSetFleetFactory = SetFleetFactory<int>();
 
 void main() async {
   setupLogger();
diff --git a/public/dart/sledge/test/values/set_value_test.dart b/public/dart/sledge/test/values/set_value_test.dart
index a07a182..fe4cecc 100644
--- a/public/dart/sledge/test/values/set_value_test.dart
+++ b/public/dart/sledge/test/values/set_value_test.dart
@@ -13,20 +13,20 @@
   setupLogger();
 
   group('Set API coverage', () {
-    new SetApiTester<SetValue>(() => new SetValue<int>())
+    SetApiTester<SetValue>(() => SetValue<int>())
       ..testApi()
       ..testObserver();
   });
 
   test('SetValue add and contains.', () {
-    var s = new SetValue<int>();
+    var s = SetValue<int>();
     expect(s.contains(0), equals(false));
     expect(s.add(0), equals(true));
     expect(s.contains(0), equals(true));
   });
 
   test('SetValue add twice and contains.', () {
-    var s = new SetValue<int>();
+    var s = SetValue<int>();
     expect(s.contains(0), equals(false));
     expect(s.add(0), equals(true));
     expect(s.add(0), equals(false));
@@ -34,7 +34,7 @@
   });
 
   test('SetValue remove.', () {
-    var s = new SetValue<int>();
+    var s = SetValue<int>();
     expect(s.remove(2), equals(false));
     expect(s.add(2), equals(true));
     expect(s.remove(2), equals(true));
@@ -43,7 +43,7 @@
   });
 
   test('SetValue add, put, contains, remove.', () {
-    var s = new SetValue<String>();
+    var s = SetValue<String>();
     expect(s.contains('-'), equals(false));
     expect(s.add('-'), equals(true));
     expect(s.add('-'), equals(false));
diff --git a/public/dart/widgets/lib/src/application/application_widget.dart b/public/dart/widgets/lib/src/application/application_widget.dart
index c74edca..fbf8412 100644
--- a/public/dart/widgets/lib/src/application/application_widget.dart
+++ b/public/dart/widgets/lib/src/application/application_widget.dart
@@ -42,7 +42,7 @@
   }) : super(key: key);
 
   @override
-  _ApplicationWidgetState createState() => new _ApplicationWidgetState();
+  _ApplicationWidgetState createState() => _ApplicationWidgetState();
 }
 
 class _ApplicationWidgetState extends State<ApplicationWidget> {
@@ -73,7 +73,7 @@
   }
 
   @override
-  Widget build(BuildContext context) => new ChildView(
+  Widget build(BuildContext context) => ChildView(
         connection: _connection,
         hitTestable: widget.hitTestable,
         focusable: widget.focusable,
@@ -85,11 +85,11 @@
   }
 
   void _launchApp() {
-    _applicationController = new ComponentControllerProxy();
+    _applicationController = ComponentControllerProxy();
 
-    Services incomingServices = new Services();
+    Services incomingServices = Services();
     widget.launcher.createComponent(
-      new LaunchInfo(
+      LaunchInfo(
           url: widget.url, directoryRequest: incomingServices.request()),
       _applicationController.ctrl.request(),
     );
diff --git a/public/dart/widgets/lib/src/application/application_widget_deprecated.dart b/public/dart/widgets/lib/src/application/application_widget_deprecated.dart
index bfea44b..7ccdced 100644
--- a/public/dart/widgets/lib/src/application/application_widget_deprecated.dart
+++ b/public/dart/widgets/lib/src/application/application_widget_deprecated.dart
@@ -42,7 +42,7 @@
   }) : super(key: key);
 
   @override
-  _ApplicationWidgetState createState() => new _ApplicationWidgetState();
+  _ApplicationWidgetState createState() => _ApplicationWidgetState();
 }
 
 class _ApplicationWidgetState extends State<ApplicationWidget> {
@@ -73,7 +73,7 @@
   }
 
   @override
-  Widget build(BuildContext context) => new ChildView(
+  Widget build(BuildContext context) => ChildView(
         connection: _connection,
         hitTestable: widget.hitTestable,
         focusable: widget.focusable,
@@ -85,11 +85,11 @@
   }
 
   void _launchApp() {
-    _applicationController = new ComponentControllerProxy();
+    _applicationController = ComponentControllerProxy();
 
-    Services incomingServices = new Services();
+    Services incomingServices = Services();
     widget.launcher.createComponent(
-      new LaunchInfo(
+      LaunchInfo(
           url: widget.url, directoryRequest: incomingServices.request()),
       _applicationController.ctrl.request(),
     );
diff --git a/public/dart/widgets/lib/src/model/spring_model.dart b/public/dart/widgets/lib/src/model/spring_model.dart
index 5334ce5..a503d0c 100644
--- a/public/dart/widgets/lib/src/model/spring_model.dart
+++ b/public/dart/widgets/lib/src/model/spring_model.dart
@@ -8,7 +8,7 @@
 export 'ticking_model.dart' show ScopedModel, Model, ScopedModelDescendant;
 
 const RK4SpringDescription _kSimulationDesc =
-    const RK4SpringDescription(tension: 450.0, friction: 50.0);
+    RK4SpringDescription(tension: 450.0, friction: 50.0);
 
 /// Models the progress of a spring simulation.
 class SpringModel extends TickingModel {
@@ -19,7 +19,7 @@
 
   /// Constructor.
   SpringModel({this.springDescription = _kSimulationDesc}) {
-    _simulation = new RK4SpringSimulation(
+    _simulation = RK4SpringSimulation(
       initValue: 0.0,
       desc: springDescription,
     );
@@ -27,7 +27,7 @@
 
   /// Jumps the simulation to [value].
   void jump(double value) {
-    _simulation = new RK4SpringSimulation(
+    _simulation = RK4SpringSimulation(
       initValue: value,
       desc: springDescription,
     );
diff --git a/public/dart/widgets/lib/src/model/ticking_model.dart b/public/dart/widgets/lib/src/model/ticking_model.dart
index 2336549..e11f9f4 100644
--- a/public/dart/widgets/lib/src/model/ticking_model.dart
+++ b/public/dart/widgets/lib/src/model/ticking_model.dart
@@ -21,7 +21,7 @@
       return;
     }
     if (handleTick(0.0)) {
-      _ticker = new Ticker(_onTick);
+      _ticker = Ticker(_onTick);
       _lastTick = Duration.zero;
       _ticker.start();
     }
diff --git a/public/dart/widgets/lib/src/model/tracing_spring_model.dart b/public/dart/widgets/lib/src/model/tracing_spring_model.dart
index 541f465..42bf224 100644
--- a/public/dart/widgets/lib/src/model/tracing_spring_model.dart
+++ b/public/dart/widgets/lib/src/model/tracing_spring_model.dart
@@ -11,7 +11,7 @@
 export 'spring_model.dart' show ScopedModel, Model, ScopedModelDescendant;
 
 const RK4SpringDescription _kSimulationDesc =
-    const RK4SpringDescription(tension: 450.0, friction: 50.0);
+    RK4SpringDescription(tension: 450.0, friction: 50.0);
 
 /// Models the progress of a spring simulation.
 class TracingSpringModel extends SpringModel {
@@ -24,7 +24,7 @@
     String traceName = 'TracingSpringModel',
     Logger cobaltLogger,
     Map<double, int> targetToCobaltMetricIdMap = const <double, int>{},
-  })  : _frameRateTracer = new FrameRateTracer(
+  })  : _frameRateTracer = FrameRateTracer(
           name: traceName,
           cobaltLogger: cobaltLogger,
         ),
diff --git a/public/dart/widgets/lib/src/utils/frame_rate_tracer.dart b/public/dart/widgets/lib/src/utils/frame_rate_tracer.dart
index 19f5814..b826759 100644
--- a/public/dart/widgets/lib/src/utils/frame_rate_tracer.dart
+++ b/public/dart/widgets/lib/src/utils/frame_rate_tracer.dart
@@ -17,7 +17,7 @@
   /// an observation to cobalt.
   final cobalt.Logger cobaltLogger;
 
-  DateTime _animationStart = new DateTime.now();
+  DateTime _animationStart = DateTime.now();
   int _frames = 0;
   String _currentTargetName;
   int _currentCobaltMetricId;
@@ -29,7 +29,7 @@
   void start({String targetName, int cobaltMetricId}) {
     _currentTargetName = targetName;
     _currentCobaltMetricId = cobaltMetricId;
-    _animationStart = new DateTime.now();
+    _animationStart = DateTime.now();
     _frames = 0;
   }
 
@@ -44,7 +44,7 @@
       return;
     }
     int microSeconds =
-        new DateTime.now().difference(_animationStart).inMicroseconds;
+        DateTime.now().difference(_animationStart).inMicroseconds;
     double frameRate = _frames.toDouble() * 1000000.0 / microSeconds.toDouble();
     String prefix = _currentTargetName?.isEmpty ?? true
         ? '$name'
diff --git a/public/dart/widgets/lib/src/utils/pointer_events_listener.dart b/public/dart/widgets/lib/src/utils/pointer_events_listener.dart
index 9370ce9..33c5dc1 100644
--- a/public/dart/widgets/lib/src/utils/pointer_events_listener.dart
+++ b/public/dart/widgets/lib/src/utils/pointer_events_listener.dart
@@ -15,7 +15,7 @@
 class PointerEventsListener extends PointerCaptureListenerHack {
   // Holds the fidl binding to receive pointer events.
   final PointerCaptureListenerHackBinding _pointerCaptureListenerBinding =
-      new PointerCaptureListenerHackBinding();
+      PointerCaptureListenerHackBinding();
 
   // Holds the last [PointerEvent] mapped to its pointer id. This is used to
   // determine the correct [PointerDataPacket] to generate at boundary condition
@@ -69,7 +69,7 @@
   }
 
   PointerEvent _clone(PointerEvent event, [PointerEventPhase phase]) {
-    return new PointerEvent(
+    return PointerEvent(
         buttons: event.buttons,
         deviceId: event.deviceId,
         eventTime: event.eventTime,
@@ -184,10 +184,10 @@
     }
 
     // Convert from PointerEvent to PointerData.
-    final data = new ui.PointerData(
+    final data = ui.PointerData(
       buttons: event.buttons,
       device: event.pointerId,
-      timeStamp: new Duration(microseconds: event.eventTime ~/ 1000),
+      timeStamp: Duration(microseconds: event.eventTime ~/ 1000),
       change: _changeFromPointerEvent(event),
       kind: _kindFromPointerEvent(event),
       physicalX: event.x * ui.window.devicePixelRatio,
diff --git a/public/dart/widgets/lib/src/utils/pointer_events_listener_deprecated.dart b/public/dart/widgets/lib/src/utils/pointer_events_listener_deprecated.dart
index ab73c9e..a659d13 100644
--- a/public/dart/widgets/lib/src/utils/pointer_events_listener_deprecated.dart
+++ b/public/dart/widgets/lib/src/utils/pointer_events_listener_deprecated.dart
@@ -13,7 +13,7 @@
 class PointerEventsListener implements PointerCaptureListenerHack {
   // Holds the fidl binding to receive pointer events.
   final PointerCaptureListenerHackBinding _pointerCaptureListenerBinding =
-      new PointerCaptureListenerHackBinding();
+      PointerCaptureListenerHackBinding();
 
   // Holds the last [PointerEvent] mapped to its pointer id. This is used to
   // determine the correct [PointerDataPacket] to generate at boundary condition
@@ -64,7 +64,7 @@
   }
 
   PointerEvent _clone(PointerEvent event, [PointerEventPhase phase]) {
-    return new PointerEvent(
+    return PointerEvent(
         buttons: event.buttons,
         deviceId: event.deviceId,
         eventTime: event.eventTime,
@@ -91,7 +91,7 @@
     Timeline.startSync('PointerEventsListener.onPointerEvent');
     final packet = _getPacket(event);
     if (packet != null) {
-      _originalCallback(new ui.PointerDataPacket(data: [packet]));
+      _originalCallback(ui.PointerDataPacket(data: [packet]));
     }
     Timeline.finishSync();
   }
@@ -179,10 +179,10 @@
     }
 
     // Convert from PointerEvent to PointerData.
-    final data = new ui.PointerData(
+    final data = ui.PointerData(
       buttons: event.buttons,
       device: event.pointerId,
-      timeStamp: new Duration(microseconds: event.eventTime ~/ 1000),
+      timeStamp: Duration(microseconds: event.eventTime ~/ 1000),
       change: _changeFromPointerEvent(event),
       kind: _kindFromPointerEvent(event),
       physicalX: event.x * ui.window.devicePixelRatio,
diff --git a/public/dart/widgets/lib/src/widgets/alphatar.dart b/public/dart/widgets/lib/src/widgets/alphatar.dart
index ac7cc61..64b1610 100644
--- a/public/dart/widgets/lib/src/widgets/alphatar.dart
+++ b/public/dart/widgets/lib/src/widgets/alphatar.dart
@@ -72,19 +72,19 @@
   }) {
     assert(avatarUrl != null || letter != null);
     assert(retry != null);
-    return new Alphatar(
+    return Alphatar(
       key: key,
       avatarImage: avatarUrl != null && avatarUrl.isNotEmpty
           ? avatarUrl.startsWith('http')
-              ? new Image(
+              ? Image(
                   image: retry
-                      ? new NetworkImageWithRetry(avatarUrl)
-                      : new NetworkImage(avatarUrl),
+                      ? NetworkImageWithRetry(avatarUrl)
+                      : NetworkImage(avatarUrl),
                   width: size,
                   height: size,
                   fit: BoxFit.cover,
                 )
-              : new Image.asset(
+              : Image.asset(
                   avatarUrl,
                   width: size,
                   height: size,
@@ -106,7 +106,7 @@
     Color backgroundColor,
   }) {
     assert(name != null);
-    return new Alphatar(
+    return Alphatar(
       key: key,
       avatarImage: avatarImage,
       letter: name.isNotEmpty ? name[0] : '',
@@ -125,7 +125,7 @@
     bool retry = true,
   }) {
     assert(name != null);
-    return new Alphatar.withUrl(
+    return Alphatar.withUrl(
       key: key,
       avatarUrl: avatarUrl,
       letter: name.isNotEmpty ? name[0] : '',
@@ -146,7 +146,7 @@
     // https://github.com/flutter/flutter/issues/6229
     Widget image;
     if (avatarImage != null) {
-      image = new Stack(
+      image = Stack(
         fit: StackFit.passthrough,
         children: <Widget>[
           _buildLetter(),
@@ -157,10 +157,10 @@
       image = _buildLetter();
     }
 
-    return new Container(
+    return Container(
       width: size,
       height: size,
-      child: new ClipOval(
+      child: ClipOval(
         child: image,
       ),
     );
@@ -169,21 +169,21 @@
   Widget _buildLetter() {
     String text = letter?.toUpperCase() ?? '';
 
-    return new Container(
+    return Container(
       alignment: FractionalOffset.center,
-      decoration: new BoxDecoration(
+      decoration: BoxDecoration(
         color: text.isNotEmpty ? backgroundColor : Colors.transparent,
         shape: BoxShape.circle,
       ),
       child: text.isNotEmpty
-          ? new Text(
+          ? Text(
               text,
-              style: new TextStyle(
+              style: TextStyle(
                 color: Colors.white,
                 fontSize: size / 2.0,
               ),
             )
-          : new Icon(
+          : Icon(
               Icons.error,
               size: size,
               color: Colors.red,
@@ -192,7 +192,7 @@
   }
 
   static Color _pickRandomColor() {
-    return _kAllowedColors[new Random().nextInt(_kAllowedColors.length)];
+    return _kAllowedColors[Random().nextInt(_kAllowedColors.length)];
   }
 
   static Color _pickColorForString(String str) {
diff --git a/public/dart/widgets/lib/src/widgets/fuchsia_spinner.dart b/public/dart/widgets/lib/src/widgets/fuchsia_spinner.dart
index 8a5d4f0..c43c4cc 100644
--- a/public/dart/widgets/lib/src/widgets/fuchsia_spinner.dart
+++ b/public/dart/widgets/lib/src/widgets/fuchsia_spinner.dart
@@ -11,9 +11,9 @@
 const double _kInitialFractionalDiameter = 1.0 / 1.2;
 const double _kTargetFractionalDiameter = 1.0;
 const double _kRotationRadians = 6 * math.pi;
-const Curve _kDefaultCurve = const Cubic(0.3, 0.1, 0.3, 0.9);
+const Curve _kDefaultCurve = Cubic(0.3, 0.1, 0.3, 0.9);
 
-const Duration _kAnimationDuration = const Duration(seconds: 2);
+const Duration _kAnimationDuration = Duration(seconds: 2);
 
 /// The spinner used by fuchsia flutter apps.
 class FuchsiaSpinner extends StatefulWidget {
@@ -26,21 +26,21 @@
   });
 
   @override
-  _FuchsiaSpinnerState createState() => new _FuchsiaSpinnerState();
+  _FuchsiaSpinnerState createState() => _FuchsiaSpinnerState();
 }
 
 class _FuchsiaSpinnerState extends State<FuchsiaSpinner>
     with SingleTickerProviderStateMixin {
-  final Tween<double> _fractionalWidthTween = new Tween<double>(
+  final Tween<double> _fractionalWidthTween = Tween<double>(
     begin: _kInitialFractionalDiameter,
     end: _kTargetFractionalDiameter,
   );
-  final Tween<double> _fractionalHeightTween = new Tween<double>(
+  final Tween<double> _fractionalHeightTween = Tween<double>(
     begin: _kInitialFractionalDiameter,
     end: _kInitialFractionalDiameter * 2 / 3,
   );
 
-  final Curve _firstHalfCurve = const Cubic(0.75, 0.25, 0.25, 1.0);
+  final Curve _firstHalfCurve = Cubic(0.75, 0.25, 0.25, 1.0);
   final Curve _secondHalfCurve = _kDefaultCurve;
 
   AnimationController _controller;
@@ -48,7 +48,7 @@
   @override
   void initState() {
     super.initState();
-    _controller = new AnimationController(
+    _controller = AnimationController(
       vsync: this,
       duration: _kAnimationDuration,
     )..repeat(period: _kAnimationDuration);
@@ -61,13 +61,13 @@
   }
 
   @override
-  Widget build(BuildContext context) => new LayoutBuilder(
+  Widget build(BuildContext context) => LayoutBuilder(
         builder: (_, BoxConstraints constraints) {
           double maxDiameter = math.min(
             constraints.maxWidth,
             constraints.maxHeight,
           );
-          return new AnimatedBuilder(
+          return AnimatedBuilder(
             animation: _controller,
             builder: (_, __) {
               double tweenProgress = _tweenValue;
@@ -79,24 +79,24 @@
                   _fractionalHeightTween.transform(
                     tweenProgress,
                   );
-              return new Transform(
+              return Transform(
                 alignment: FractionalOffset.center,
-                transform: new Matrix4.rotationZ(
+                transform: Matrix4.rotationZ(
                   _kDefaultCurve.transform(_controller.value) *
                       _kRotationRadians,
                 ),
-                child: new Center(
-                  child: new Container(
+                child: Center(
+                  child: Container(
                     width: width,
                     height: height,
-                    child: new Material(
+                    child: Material(
                       elevation: tweenProgress * 10.0,
                       color: Color.lerp(
                         widget.color.withOpacity(0.8),
                         widget.color,
                         tweenProgress,
                       ),
-                      borderRadius: new BorderRadius.circular(width / 2),
+                      borderRadius: BorderRadius.circular(width / 2),
                     ),
                   ),
                 ),
diff --git a/public/dart/widgets/lib/src/widgets/future_widget.dart b/public/dart/widgets/lib/src/widgets/future_widget.dart
index 8fd063d..9b5d8b9 100644
--- a/public/dart/widgets/lib/src/widgets/future_widget.dart
+++ b/public/dart/widgets/lib/src/widgets/future_widget.dart
@@ -31,7 +31,7 @@
   }) : assert(child != null);
 
   @override
-  _FutureWidgetState createState() => new _FutureWidgetState();
+  _FutureWidgetState createState() => _FutureWidgetState();
 }
 
 class _FutureWidgetState extends State<FutureWidget> {
diff --git a/public/dart/widgets/lib/src/widgets/lottie_player.dart b/public/dart/widgets/lib/src/widgets/lottie_player.dart
index 7b47d2b..59b694e 100644
--- a/public/dart/widgets/lib/src/widgets/lottie_player.dart
+++ b/public/dart/widgets/lib/src/widgets/lottie_player.dart
@@ -51,7 +51,7 @@
   }) : super(key: key);
 
   @override
-  _LottiePlayerState createState() => new _LottiePlayerState();
+  _LottiePlayerState createState() => _LottiePlayerState();
 }
 
 class _LottiePlayerState extends State<LottiePlayer> {
diff --git a/public/dart/widgets/lib/src/widgets/settings_item.dart b/public/dart/widgets/lib/src/widgets/settings_item.dart
index b8292ba..49f3ab2 100644
--- a/public/dart/widgets/lib/src/widgets/settings_item.dart
+++ b/public/dart/widgets/lib/src/widgets/settings_item.dart
@@ -33,23 +33,23 @@
 
   @override
   Widget build(BuildContext context) {
-    return new InkWell(
+    return InkWell(
         onTap: onTap,
-        child: new Container(
+        child: Container(
             height: 64.0 * scale,
             width: 480.0 * scale,
-            child: new Row(
+            child: Row(
               crossAxisAlignment: CrossAxisAlignment.center,
               children: <Widget>[_buildLogo(), _buildText()],
             )));
   }
 
   Widget _buildLogo() {
-    return new Container(
-        padding: new EdgeInsets.only(
+    return Container(
+        padding: EdgeInsets.only(
           right: 16.0 * scale,
         ),
-        child: new Image.asset(
+        child: Image.asset(
           iconUrl,
           height: 48.0 * scale,
           width: 48.0 * scale,
@@ -57,25 +57,25 @@
   }
 
   Widget _buildText() {
-    final Text text = new Text(label, style: _textStyle(scale));
+    final Text text = Text(label, style: _textStyle(scale));
 
     if (details == null) {
       return text;
     }
 
-    return new Column(
+    return Column(
       mainAxisSize: MainAxisSize.min,
       mainAxisAlignment: MainAxisAlignment.center,
       crossAxisAlignment: CrossAxisAlignment.start,
       children: <Widget>[
         text,
-        new Text(details, style: _textStyle(scale, isError: isError))
+        Text(details, style: _textStyle(scale, isError: isError))
       ],
     );
   }
 }
 
-TextStyle _textStyle(double scale, {bool isError = false}) => new TextStyle(
+TextStyle _textStyle(double scale, {bool isError = false}) => TextStyle(
       color: isError ? Colors.grey[900] : Colors.redAccent,
       fontSize: 24.0 * scale,
       fontWeight: FontWeight.w200,
diff --git a/public/dart/widgets/lib/src/widgets/window_media_query.dart b/public/dart/widgets/lib/src/widgets/window_media_query.dart
index ac9a3f2..efa36ce 100644
--- a/public/dart/widgets/lib/src/widgets/window_media_query.dart
+++ b/public/dart/widgets/lib/src/widgets/window_media_query.dart
@@ -18,7 +18,7 @@
   const WindowMediaQuery({this.onWindowMetricsChanged, this.child});
 
   @override
-  _WindowMediaQueryState createState() => new _WindowMediaQueryState();
+  _WindowMediaQueryState createState() => _WindowMediaQueryState();
 }
 
 class _WindowMediaQueryState extends State<WindowMediaQuery>
@@ -36,8 +36,8 @@
   }
 
   @override
-  Widget build(BuildContext context) => new MediaQuery(
-        data: new MediaQueryData.fromWindow(ui.window),
+  Widget build(BuildContext context) => MediaQuery(
+        data: MediaQueryData.fromWindow(ui.window),
         child: widget.child,
       );
 
diff --git a/public/dart/widgets/test/alphatar_test.dart b/public/dart/widgets/test/alphatar_test.dart
index b4fd594..23e5d7d 100644
--- a/public/dart/widgets/test/alphatar_test.dart
+++ b/public/dart/widgets/test/alphatar_test.dart
@@ -20,9 +20,9 @@
     await HttpOverrides.runZoned(() async {
       // First, try without providing a letter.
       await tester.pumpWidget(
-        new MaterialApp(
-          home: new Material(
-            child: new Alphatar.withUrl(
+        MaterialApp(
+          home: Material(
+            child: Alphatar.withUrl(
               avatarUrl: profileUrl,
               retry: false,
             ),
@@ -35,9 +35,9 @@
 
       // Try again with a letter provided.
       await tester.pumpWidget(
-        new MaterialApp(
-          home: new Material(
-            child: new Alphatar.withUrl(
+        MaterialApp(
+          home: Material(
+            child: Alphatar.withUrl(
               avatarUrl: profileUrl,
               letter: 'L',
               retry: false,
@@ -55,9 +55,9 @@
       'Alphatar should display the fall-back letter, '
       'when the image is not provided', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new MaterialApp(
-        home: new Material(
-          child: new Alphatar(letter: 'L'),
+      MaterialApp(
+        home: Material(
+          child: Alphatar(letter: 'L'),
         ),
       ),
     );
@@ -69,8 +69,8 @@
   test('Alphtars for the same name should have the same background color.', () {
     String name = 'John Doe';
 
-    Alphatar a1 = new Alphatar.fromName(name: name);
-    Alphatar a2 = new Alphatar.fromName(name: name);
+    Alphatar a1 = Alphatar.fromName(name: name);
+    Alphatar a2 = Alphatar.fromName(name: name);
     expect(a1.backgroundColor, equals(a2.backgroundColor));
   });
 }
diff --git a/public/dart/widgets/test/providers_test.dart b/public/dart/widgets/test/providers_test.dart
index d1afc33..5151650 100644
--- a/public/dart/widgets/test/providers_test.dart
+++ b/public/dart/widgets/test/providers_test.dart
@@ -61,14 +61,14 @@
 
       // Must wait one async cycle for value to propagate.
       streamController.add('stream');
-      await new Future.delayed(Duration.zero);
+      await Future.delayed(Duration.zero);
 
       expect(providers.getFromType(String).get(buildContext), 'stream');
       expect(providers.getFromType(String).get(buildContext), 'stream');
 
       // Must wait one async cycle for value to propagate.
       streamController.add('stream2');
-      await new Future.delayed(Duration.zero);
+      await Future.delayed(Duration.zero);
 
       expect(providers.getFromType(String).get(buildContext), 'stream2');