Adjust GN for removal of libdart.

Change-Id: I113e957bff6319a718cac71b426ff84d85db3352
diff --git a/BUILD.gn b/BUILD.gn
index b51765c..3bcb619 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -28,7 +28,7 @@
   ]
 
   public_deps = [
-    "//dart/runtime:libdart",
+    "//dart/runtime:dart_api",
     "//lib/ftl",
     "//lib/tonic/converter",
     "//lib/tonic/file_loader",
diff --git a/converter/BUILD.gn b/converter/BUILD.gn
index 73a5d52..e1646dc 100644
--- a/converter/BUILD.gn
+++ b/converter/BUILD.gn
@@ -9,7 +9,7 @@
   ]
 
   public_deps = [
-    "//dart/runtime:libdart",
+    "//dart/runtime:dart_api",
     "//lib/ftl",
   ]
 }
diff --git a/debugger/BUILD.gn b/debugger/BUILD.gn
index 59df725..1b208b4 100644
--- a/debugger/BUILD.gn
+++ b/debugger/BUILD.gn
@@ -9,7 +9,7 @@
   ]
 
   deps = [
-    "//dart/runtime:libdart",
+    "//dart/runtime:dart_api",
     "//lib/ftl",
   ]
 }
diff --git a/file_loader/BUILD.gn b/file_loader/BUILD.gn
index c30a91f..1a67863 100644
--- a/file_loader/BUILD.gn
+++ b/file_loader/BUILD.gn
@@ -9,7 +9,7 @@
   ]
 
   deps = [
-    "//dart/runtime:libdart",
+    "//dart/runtime:dart_api",
     "//lib/ftl",
     "//lib/tonic/converter",
     "//lib/tonic/parsers",
diff --git a/logging/BUILD.gn b/logging/BUILD.gn
index 1ac2009..c5fdd4f 100644
--- a/logging/BUILD.gn
+++ b/logging/BUILD.gn
@@ -11,7 +11,7 @@
   ]
 
   public_deps = [
-    "//dart/runtime:libdart",
+    "//dart/runtime:dart_api",
     "//lib/ftl",
   ]
 }
diff --git a/mx/BUILD.gn b/mx/BUILD.gn
index 3f8f11b..07ccccf 100644
--- a/mx/BUILD.gn
+++ b/mx/BUILD.gn
@@ -8,7 +8,7 @@
   ]
 
   public_deps = [
-    "//dart/runtime:libdart",
+    "//dart/runtime:dart_api",
     "//lib/tonic/converter",
     "//magenta/system/ulib/mx",
   ]
diff --git a/scopes/BUILD.gn b/scopes/BUILD.gn
index 25f3840..04df943 100644
--- a/scopes/BUILD.gn
+++ b/scopes/BUILD.gn
@@ -10,7 +10,7 @@
   ]
 
   public_deps = [
-    "//dart/runtime:libdart",
+    "//dart/runtime:dart_api",
     "//lib/ftl",
   ]
 }
diff --git a/typed_data/BUILD.gn b/typed_data/BUILD.gn
index 0811ed4..72daa89 100644
--- a/typed_data/BUILD.gn
+++ b/typed_data/BUILD.gn
@@ -17,7 +17,7 @@
   ]
 
   public_deps = [
-    "//dart/runtime:libdart",
+    "//dart/runtime:dart_api",
     "//lib/ftl",
     "//lib/tonic/converter",
     "//lib/tonic/logging",