Dart: Adjusts class Application for removal of Application/Shell Client=

services/dart/test/pingpong.dart

Index: services/dart/test/pingpong.dart
diff --git a/services/dart/test/pingpong.dart b/services/dart/test/pingpong.dart
index c0fe32f4ae4010161db91a7bf33b5cd73d511d7e..65870592c23eb05d1f12932228efc021b64c7ba4 100644
--- a/services/dart/test/pingpong.dart
+++ b/services/dart/test/pingpong.dart
@@ -94,6 +94,9 @@ class PingPongServiceImpl extends PingPongServiceStub {
       _proxy.close();
     }
     close();
+    if (_application != null) {
+      _application.close();
+    }
   }
 }
 
@@ -105,8 +108,8 @@ class PingPongApplication extends Application {
 }
 
 main(List args) {
-  MojoHandle shellHandle = new MojoHandle(args[0]);
+  MojoHandle appHandle = new MojoHandle(args[0]);
   String url = args[1];
-  var pingPongApplication = new PingPongApplication.fromHandle(shellHandle);
+  var pingPongApplication = new PingPongApplication.fromHandle(appHandle);
   pingPongApplication.listen();
 }