update to polymer js 0.5.1

samples/third_party/todomvc/test/markdone_shadow_test.html

Index: samples/third_party/todomvc/test/markdone_shadow_test.html
diff --git a/samples/third_party/todomvc/test/markdone_shadow_test.html b/samples/third_party/todomvc/test/markdone_shadow_test.html
index b189e61409f40278aa9bafdc529dabbebd77a6d2..411b9d9d7ae23905f7e34188e8ce96a17c33e605 100644
--- a/samples/third_party/todomvc/test/markdone_shadow_test.html
+++ b/samples/third_party/todomvc/test/markdone_shadow_test.html
@@ -11,11 +11,12 @@ BSD-style license that can be found in the LICENSE file.
   <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
   <script>
   // Force the ShadowDOM polyfill to run regardless of whether it is needed.
-  window.Platform = window.Platform || {};
-  Platform.flags = Platform.flags || {};
-  Platform.flags.shadow = true;
+  window.WebComponents = window.WebComponents || {};
+  WebComponents.flags = WebComponents.flags || {};
+  WebComponents.flags.shadow = true;
   </script>
   <link rel="stylesheet" href="../web/app/app.css">
+  <script src="packages/web_components/webcomponents.js"></script>
   <script src="packages/web_components/dart_support.js"></script>
   <link rel="import" href="../web/elements/td_model.html">
   <link rel="import" href="../web/elements/td_todos.html">