Change end_to_end_test so it doesn't time out due to V8 bug.

dart/tests/try/end_to_end_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Whitebox integration/end-to-end test of Try Dart! site.
 ///
 /// This test opens Try Dart! in an iframe.  When opened the first time, Try
 /// Dart! will display a simple hello-world example, color tokens, compile the
 /// example, and run the result.  We've instrumented Try Dart! to use
 /// window.parent.postMessage when the running program prints anything. So this
@@ skipping 53 matching lines @@
   contentWindowProxy['onerror'] = onError;
 }
 
 void onIframeLoaded(Event event) {
   installErrorHandlerOn(event.target);
 }
 
 void main() {
   asyncStart();
   window.onMessage.listen((MessageEvent e) {
-    if (e.data == 'Hello, World!\n') {
-      // Clear the DOM to work around a bug in test.dart.
-      document.body.nodes.clear();
+    switch (e.data) {
+      case 'Hello, World!\n':
+        // Clear the DOM to work around a bug in test.dart.
+        document.body.nodes.clear();
 
-      // Clean up after ourselves.
-      window.localStorage.clear();
+        // Clean up after ourselves.
+        window.localStorage.clear();
 
-      asyncEnd();
+        asyncEnd();
+        break;
+
+      case 'dart-calling-main':
+      case 'dart-main-done':
+      case 'unittest-suite-done':
+      case 'unittest-suite-fail':
+      case 'unittest-suite-success':
+      case 'unittest-suite-wait-for-done':
+        break;
+
+      default:
+        throw 'Unexpected message: ${e.data}';
     }
   });
 
   // Clearing localStorage makes Try Dart! think it is opening for the first
   // time.
   window.localStorage.clear();
 
   IFrameElement iframe = new IFrameElement()
       ..src = '/root_build/try_dartlang_org/index.html'
       ..style.width = '90vw'
       ..style.height = '90vh'
       ..onLoad.listen(onIframeLoaded);
   document.body.append(iframe);
   // Install an error handler both on the new iframe element, and when it has
   // fired the load event.  That seems to matter according to some sources on
   // stackoverflow.
   installErrorHandlerOn(iframe);
 }