update to polymer js 0.5.1

pkg/polymer/test/template_attr_template_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.
 
 import 'dart:async';
 import 'dart:html';
 import 'package:polymer/polymer.dart';
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_config.dart';
 
@@ skipping 29 matching lines @@
         reason: 'attribute sub-template stamped');
   }
 }
 
 main() => initPolymer().run(() {
   useHtmlConfiguration();
 
   setUp(() => Polymer.onReady);
 
   test('declaration-tests-ran', () {
-    // TODO(jakemac): Change this to '2' once http://dartbug.com/20197 is fixed.

[Siggi Cherem (dart-lang), 2014/12/04 00:32:18]

woo hoo!

-    expect(testsRun, 3, reason: 'decoration-tests-ran');
+    expect(testsRun, 2, reason: 'decoration-tests-ran');
   });
 });