Dart: Adds optional named arguments for creating bindings.

mojo/dart/embedder/test/dart_to_cpp_tests.dart

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'dart:async';
 import 'dart:typed_data';
 import 'mojo:bindings' as bindings;
 import 'mojo:core' as core;
 
 import 'package:mojo/dart/embedder/test/dart_to_cpp.mojom.dart';
 
 class DartSideImpl implements DartSide {
   static const int BAD_VALUE = 13;
   static const int ELEMENT_BYTES = 1;
   static const int CAPACITY_BYTES = 64;
 
   DartSideStub _stub;
   CppSideProxy cppSide;
 
   Uint8List _sampleData;
   Uint8List _sampleMessage;
   Completer _completer;
 
   DartSideImpl(core.MojoMessagePipeEndpoint endpoint) {
-    _stub = new DartSideStub.fromEndpoint(endpoint)
-            ..delegate = this
-            ..listen();
+    _stub = new DartSideStub.fromEndpoint(endpoint, impl: this);
     _sampleData = new Uint8List(CAPACITY_BYTES);
     for (int i = 0; i < _sampleData.length; ++i) {
       _sampleData[i] = i;
     }
     _sampleMessage = new Uint8List(CAPACITY_BYTES);
     for (int i = 0; i < _sampleMessage.length; ++i) {
       _sampleMessage[i] = 255 - i;
     }
     _completer = new Completer();
   }
@@ skipping 75 matching lines @@
 main(List args) {
   assert(args.length == 2);
   int mojoHandle = args[0];
   var rawHandle = new core.MojoHandle(mojoHandle);
   var endpoint = new core.MojoMessagePipeEndpoint(rawHandle);
   var dartSide = new DartSideImpl(endpoint);
   dartSide.future.then((_) {
     print('Success');
   });
 }