Dart: Adds optional named arguments for creating bindings.

mojo/dart/embedder/test/dart_to_cpp_tests.dart

Index: mojo/dart/embedder/test/dart_to_cpp_tests.dart
diff --git a/mojo/dart/embedder/test/dart_to_cpp_tests.dart b/mojo/dart/embedder/test/dart_to_cpp_tests.dart
index c93d82d4e9f89302fdb30de5ad6fd3e63a02d501..385884759d34da758dece25bac9c0e4ab2afe82d 100644
--- a/mojo/dart/embedder/test/dart_to_cpp_tests.dart
+++ b/mojo/dart/embedder/test/dart_to_cpp_tests.dart
@@ -14,7 +14,7 @@ class DartSideImpl implements DartSide {
   static const int ELEMENT_BYTES = 1;
   static const int CAPACITY_BYTES = 64;
 
-  DartSideStub _stub;
+  DartSideBinding _binding;
   CppSideProxy cppSide;
 
   Uint8List _sampleData;
@@ -22,9 +22,7 @@ class DartSideImpl implements DartSide {
   Completer _completer;
 
   DartSideImpl(core.MojoMessagePipeEndpoint endpoint) {
-    _stub = new DartSideStub.fromEndpoint(endpoint)
-            ..delegate = this
-            ..listen();
+    _binding = new DartSideBinding.fromEndpoint(endpoint, delegate: this);
     _sampleData = new Uint8List(CAPACITY_BYTES);
     for (int i = 0; i < _sampleData.length; ++i) {
       _sampleData[i] = i;