update to polymer js 0.5.1

pkg/polymer/lib/src/build/messages.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.
 
 /// Contains all error and warning messages produced by polymer.
 library polymer.src.build.messages;
 
 import 'package:code_transformers/messages/messages.dart';
 import 'constants.dart';
 
@@ skipping 538 matching lines @@
 places you probably want to override this behavior to prevent duplicate code.
 To do this, use the following pattern to update your pubspec.yaml:
 
     transformers:
     - polymer:
         inline_stylesheets:
           web/my_file.css: false
 
 If you would like to hide this warning and keep it inlined, do the same thing
 but assign the value to true.
-'''
-);
+''');
 
 const DART_SUPPORT_NO_LONGER_REQUIRED = const MessageTemplate(
     const MessageId('polymer', 43),
     'No need to include "dart_support.js" by hand anymore.',
-    '"dart_support.js" not necessary',
+    '"dart_support.js" injected automatically',
     '''
 The script `packages/web_components/dart_support.js` is still used, but you no
 longer need to put it in your application's entrypoint.
 
 In the past this file served two purposes:
 
-  * to make dart2js work well with the platform polyfills, and
+  * to make dart2js work well with the web_components polyfills, and
   * to support registering Dart APIs for JavaScript custom elements.
 
 Now, the code from `dart_support.js` is split in two halves. The half for
 dart2js is now injected by the polymer transformers automatically during `pub
 build`. The `web_components` package provides an HTML file containing the other
 half.  Developers of packages that wrap JavaScript custom elements (like
 `core_elements` and `paper_elements`) will import that file directly, so
 application developers don't have to worry about it anymore.
-'''
-);
+''');
 
 const SCRIPT_INCLUDED_MORE_THAN_ONCE = const MessageTemplate(
     const MessageId('polymer', 44),
     'The `%-url-%` script was included more than once.',
     'Dart script file included more than once.',
     '''
 Duplicate dart scripts often happen if you have multiple html imports that
 include the same script. The simplest workaround for this is to move your dart
 script to its own html file, and import that instead of the script (html imports
 are automatically deduped).
 
 For example:
 
     <script type="application/dart" src="foo.dart"></script>
 
 Should turn into:
 
     <link rel="import" href="foo.html">
 
 And `foo.html` should look like:
 
     <script type="application/dart" src="foo.dart"></script>
 ''');
+
+const WEB_COMPONENTS_NO_LONGER_REQUIRED = const MessageTemplate(
+    const MessageId('polymer', 45),
+    'No need to include "webcomponents.js" by hand anymore.',
+    '"webcomponents.js" injected automatically',
+    '''
+The script `packages/web_components/webcomponents.js` is still used, but you no
+longer need to put it in your application's entrypoint.
+
+The polyfills provided by this file are no longer required in chrome and will
+automatically be added during `pub build` and `pub serve`.
+''');
+
+const PLATFORM_JS_RENAMED = const MessageTemplate(
+    const MessageId('polymer', 46),
+    '"platform.js" has been renamed to "webcomponents.js".',
+    '"platform.js" renamed to "webcomponents.js".',
+    '''
+The script `packages/web_components/platform.js` has been renamed to
+`packages/web_components/webcomponents.js`. This is automatically fixed in
+`pub serve` and `pub build` but we may remove this functionality in the next
+breaking version of Polymer.
+
+In addition, it is no longer required that you include this file directly, as
+`pub build` and `pub serve` will inject it for you, and its not required when
+running in dartium with a local server.
+''');