Update to polymer js version 0.4.1

pkg/polymer/test/unbind_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 polymer.test.unbind_test;
 
 import 'dart:async' show Future, scheduleMicrotask;
 import 'dart:html';
 
 @MirrorsUsed(targets: const [Polymer], override: 'polymer.test.unbind_test')
 import 'dart:mirrors' show reflect, reflectClass, MirrorSystem, MirrorsUsed;
 
 import 'package:polymer/polymer.dart';
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_config.dart';
 
 @CustomTag('x-test')
 class XTest extends PolymerElement {
   @observable var foo = '';
   @observable var bar;
 
-  bool forceReady = true;

[Siggi Cherem (dart-lang), 2014/09/23 21:08:52]

oh, when adding new methods is a breaking change. Fun :)

[jakemac, 2014/09/23 22:15:01]

Done.

   bool fooWasChanged = false;
   var validBar;
 
   factory XTest() => new Element.tag('x-test');
   XTest.created() : super.created();
 
   ready() {}
 
   fooChanged() {
     fooWasChanged = true;
@@ skipping 86 matching lines @@
         'element is bound when manually inserted');
     expect(_observerCount(node), greaterThan(0));
     node.remove();
     return node;
   }).then(delay).then((node) {
     expect(_unbound(node), true, reason:
         'element is unbound when manually removed is called');
     expect(_observerCount(node), 0);
   });
 }