[ledger] Replace usage of New methods on ledger's Page.

LE-618

Change-Id: I5e0ebf27d80fe4b352ad4b5040e87c0b48efb6b5
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 a5f0ce1..a4bb05d 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
@@ -45,7 +45,7 @@
     await _ledger.getRootPage(_page.ctrl.request());
 
     final snapshot = ledger.PageSnapshotProxy();
-    await _page.getSnapshotNew(
+    await _page.getSnapshot(
       snapshot.ctrl.request(),
       Uint8List(0),
       _pageWatcherBinding.wrap(_PageWatcher(this)),
@@ -62,12 +62,12 @@
 
   /// Marks the item of the given [id] as done.
   void markItemDone(List<int> id) {
-    _page.deleteNew(id);
+    _page.delete(id);
   }
 
   /// Adds a new todo item with the given [content].
   void addItem(String content) {
-    _page.putNew(_makeKey(), utf8.encode(content));
+    _page.put(_makeKey(), utf8.encode(content));
   }
 
   void _readItems(ledger.PageSnapshotProxy snapshot) {
diff --git a/public/dart/sledge/lib/src/storage/document_storage.dart b/public/dart/sledge/lib/src/storage/document_storage.dart
index 0cf1bce..e5a1e07 100644
--- a/public/dart/sledge/lib/src/storage/document_storage.dart
+++ b/public/dart/sledge/lib/src/storage/document_storage.dart
@@ -38,7 +38,7 @@
   for (Uint8List deletedKey in change.deletedKeys) {
     final Uint8List keyWithDocumentPrefix =
         concatUint8Lists(documentPrefix, deletedKey);
-    page.deleteNew(
+    page.delete(
       keyWithDocumentPrefix,
     );
   }
@@ -47,7 +47,7 @@
   for (KeyValue kv in change.changedEntries) {
     final Uint8List keyWithDocumentPrefix =
         concatUint8Lists(documentPrefix, kv.key);
-    page.putNew(
+    page.put(
       keyWithDocumentPrefix,
       kv.value,
     );
@@ -56,7 +56,7 @@
 
 void _deleteKeyValues(List<KeyValue> keyValues, ledger.Page page) {
   for (KeyValue kv in keyValues) {
-    page.deleteNew(
+    page.delete(
       kv.key,
     );
   }
diff --git a/public/dart/sledge/lib/src/storage/schema_storage.dart b/public/dart/sledge/lib/src/storage/schema_storage.dart
index 1a7ea72..62da932 100644
--- a/public/dart/sledge/lib/src/storage/schema_storage.dart
+++ b/public/dart/sledge/lib/src/storage/schema_storage.dart
@@ -28,7 +28,7 @@
   final Uint8List value = getUint8ListFromString(jsonString);
   // TODO: handle the case where |value| is larger than the maximum allowed
   // size.
-  page.putNew(
+  page.put(
     key,
     value,
   );
diff --git a/public/dart/sledge/lib/src/subscription/subscription.dart b/public/dart/sledge/lib/src/subscription/subscription.dart
index 7f929bd..ed9c07c 100644
--- a/public/dart/sledge/lib/src/subscription/subscription.dart
+++ b/public/dart/sledge/lib/src/subscription/subscription.dart
@@ -24,7 +24,7 @@
       this._applyChangeCallback)
       : _snapshotProxy = ledgerObjectsFactory.newPageSnapshotProxy(),
         _pageWatcherBinding = ledgerObjectsFactory.newPageWatcherBinding() {
-    _pageProxy.getSnapshotNew(
+    _pageProxy.getSnapshot(
       _snapshotProxy.ctrl.request(),
       Uint8List(0),
       _pageWatcherBinding.wrap(this),
diff --git a/public/dart/sledge/lib/src/transaction.dart b/public/dart/sledge/lib/src/transaction.dart
index 576eaf8..deeb1b6 100644
--- a/public/dart/sledge/lib/src/transaction.dart
+++ b/public/dart/sledge/lib/src/transaction.dart
@@ -42,10 +42,10 @@
   Future<bool> saveModification(Modification modification) async {
     // Start Ledger transaction.
     _pageProxy
-      ..startTransactionNew()
+      ..startTransaction()
       // Obtain the snapshot.
       // All the read operations in |modification| will read from that snapshot.
-      ..getSnapshotNew(
+      ..getSnapshot(
         _pageSnapshotProxy.ctrl.request(),
         Uint8List(0),
         null,
@@ -80,7 +80,7 @@
       }
 
       // Finish the transaction by commiting.
-      _pageProxy.commitNew();
+      _pageProxy.commit();
 
       // Notify the documents that the transaction has been completed.
       _documents
@@ -196,6 +196,6 @@
     _documents
       ..forEach((Document document) => document.rollbackChange())
       ..clear();
-    _pageProxy.rollbackNew();
+    _pageProxy.rollback();
   }
 }
diff --git a/public/dart/sledge/test/fakes/fake_ledger_page.dart b/public/dart/sledge/test/fakes/fake_ledger_page.dart
index de0c32b..5eedc7d 100644
--- a/public/dart/sledge/test/fakes/fake_ledger_page.dart
+++ b/public/dart/sledge/test/fakes/fake_ledger_page.dart
@@ -38,35 +38,35 @@
   StorageState get storageState => _storageState;
 
   @override
-  void putNew(Uint8List key, Uint8List value) {
+  void put(Uint8List key, Uint8List value) {
     _modification.changedEntries.add(KeyValue(key, value));
   }
 
   @override
-  void deleteNew(Uint8List key) {
+  void delete(Uint8List key) {
     _modification.deletedKeys.add(key);
   }
 
   @override
-  void startTransactionNew() {
+  void startTransaction() {
     assert(_modification.changedEntries.isEmpty);
     assert(_modification.deletedKeys.isEmpty);
   }
 
   @override
-  void commitNew() {
+  void commit() {
     _storageState.applyChange(_modification);
     onChange(_modification);
     _modification.clear();
   }
 
   @override
-  void rollbackNew() {
+  void rollback() {
     _modification.clear();
   }
 
   @override
-  void getSnapshotNew(
+  void getSnapshot(
       Object snapshotRequest, Uint8List keyPrefix, dynamic watcher) {
     if (watcher != null) {
       _watcher = watcher;