Dart: Adds Interface and InterfaceRequest interfaces.

mojo/dart/apptests/test_apps/pingpong_target/lib/main.dart

Index: mojo/dart/apptests/test_apps/pingpong_target/lib/main.dart
diff --git a/mojo/dart/apptests/test_apps/pingpong_target/lib/main.dart b/mojo/dart/apptests/test_apps/pingpong_target/lib/main.dart
index 4f35f9b1d217a1c381eaf453945e78ef9fa71455..b82ade9fbaa77031298264b073fbcb352858d0a9 100644
--- a/mojo/dart/apptests/test_apps/pingpong_target/lib/main.dart
+++ b/mojo/dart/apptests/test_apps/pingpong_target/lib/main.dart
@@ -11,21 +11,23 @@ import 'package:mojo/core.dart';
 import 'package:_mojo_for_test_only/test/pingpong_service.mojom.dart';
 
 class PingPongServiceImpl implements PingPongService {
-  PingPongServiceStub _stub;
+  PingPongService _service;
   Application _application;
-  PingPongClientProxy _pingPongClient;
+  PingPongClient _pingPongClient;
 
   PingPongServiceImpl(this._application, MojoMessagePipeEndpoint endpoint) {
-    _stub = new PingPongServiceStub.fromEndpoint(endpoint, this);
+    _service = new PingPongServiceInterface.fromEndpoint(endpoint, this);
   }
 
-  PingPongServiceImpl.fromStub(this._stub) {
-    _stub.impl = this;
+  PingPongServiceImpl.fromInterfaceRequest(
+      PingPongServiceInterfaceRequest service) {
+    service.impl = this;
+    _service = service;
   }
 
-  void setClient(Proxy proxy) {
+  void setClient(PingPongClientInterface client) {
     assert(_pingPongClient == null);
-    _pingPongClient = proxy;
+    _pingPongClient = client;
   }
 
   void ping(int pingValue) => _pingPongClient.pong(pingValue + 1);
@@ -33,15 +35,15 @@ class PingPongServiceImpl implements PingPongService {
   // These methods are unimplemented; they merely throw on invocation.
   dynamic pingTargetUrl(String url, int count, [Function responseFactory]) =>
       throw "Unimplemented";
-  dynamic pingTargetService(
-      Object service, int count, [Function responseFactory]) =>
+  dynamic pingTargetService(PingPongServiceInterface service, int count,
+      [Function responseFactory]) =>
       throw "Unimplemented";
-  dynamic getPingPongServiceDelayed(
-      Object service, [Function responseFactory]) =>
+  dynamic getPingPongServiceDelayed(PingPongServiceInterfaceRequest service,
+      [Function responseFactory]) =>
       throw "Unimplemented";
 
-  void getPingPongService(Object service) {
-    new PingPongServiceImpl.fromStub(service);
+  void getPingPongService(PingPongServiceInterfaceRequest service) {
+    new PingPongServiceImpl.fromInterfaceRequest(service);
   }
 
   void quit() {}