Update to polymer js version 0.4.1

pkg/polymer/test/force_ready_test.dart

 // Copyright (c) 2013, 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.
 
-library todomvc.test.markdone_test;
-
 import 'dart:async';
 import 'dart:html';
-import 'package:polymer/polymer.dart';
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_config.dart';
-import '../web/elements/demo_app.dart';
+import 'package:polymer/polymer.dart';
 
-/**
- * A trivial test to get the analyzer plugged into this sample. See
- * searchable_list_test.dart.
- */
-main() {
-  initPolymer();
+main() => initPolymer().run(() {
   useHtmlConfiguration();
 
-  setUp(() => Polymer.onReady);
+  setUp(() => window.on['HTMLImportsLoaded']);
 
-  test('loading the element', () {
-    return new Future(() {
-      var demoApp = querySelector('demo-app');
-      expect(demoApp is DemoApp, isTrue);
-    });
+  /// We do not port the full test, since this just proxies through to the
+  /// polymer js implementation.
+  test('can force ready', () {
+    expect(Polymer.waitingFor.length, 1);
+    expect(Polymer.waitingFor[0], querySelector('polymer-element'));
+    Polymer.forceReady();
+    return Polymer.onReady;
   });
-}
+});