Dart: Adds optional named arguments for creating bindings.

services/dart/test/pingpong/main.dart

Index: services/dart/test/pingpong/main.dart
diff --git a/services/dart/test/pingpong/main.dart b/services/dart/test/pingpong/main.dart
index 01dd1cb95cce6bd5b101c3a4da5d7c214bbc850f..a395b72af73dfadf6c9edc41ad039cbec384c26b 100644
--- a/services/dart/test/pingpong/main.dart
+++ b/services/dart/test/pingpong/main.dart
@@ -16,7 +16,7 @@ class PingPongClientImpl implements PingPongClient {
 
   PingPongClientImpl.unbound(this._count, this._completer)
       : stub = new PingPongClientStub.unbound() {
-    stub.delegate = this;
+    stub.impl = this;
   }
 
   void pong(int pongValue) {
@@ -34,13 +34,12 @@ class PingPongServiceImpl implements PingPongService {
 
   PingPongServiceImpl(Application application, MojoMessagePipeEndpoint endpoint)
       : _application = application {
-    _stub = new PingPongServiceStub.fromEndpoint(endpoint)
-            ..delegate = this
-            ..listen();
+    _stub = new PingPongServiceStub.fromEndpoint(
+        endpoint, impl: this);
   }
 
   PingPongServiceImpl.fromStub(this._stub) {
-    _stub.delegate = this;
+    _stub.impl = this;
   }
 
   listen() => _stub.listen();
@@ -61,7 +60,7 @@ class PingPongServiceImpl implements PingPongService {
       return responseFactory(false);
     }
     var completer = new Completer();
-    var pingPongService= new PingPongServiceProxy.unbound();
+    var pingPongService = new PingPongServiceProxy.unbound();
     _application.connectToService(url, pingPongService);
 
     var pingPongClient = new PingPongClientImpl.unbound(count, completer);
@@ -73,6 +72,7 @@ class PingPongServiceImpl implements PingPongService {
     }
     await completer.future;
     pingPongService.ptr.quit();
+    pingPongService.close();
 
     return responseFactory(true);
   }
@@ -91,6 +91,7 @@ class PingPongServiceImpl implements PingPongService {
     }
     await completer.future;
     pingPongService.ptr.quit();
+    pingPongService.close();
 
     return responseFactory(true);
   }
@@ -105,16 +106,16 @@ class PingPongServiceImpl implements PingPongService {
       _pingPongClient = null;
     }
     _stub.close();
-    if (_application != null) {
-      _application.close();
-    }
+    _stub = null;
   }
 }
 
 class PingPongApplication extends Application {
   PingPongApplication.fromHandle(MojoHandle handle) : super.fromHandle(handle);
 
-  void acceptConnection(String requestorUrl, ApplicationConnection connection) {
+  void acceptConnection(String requestorUrl,
+                        ApplicationConnection connection,
+                        String resolvedUrl) {
     connection.provideService(PingPongServiceName,
         (endpoint) => new PingPongServiceImpl(this, endpoint));
     connection.listen();