fix PolymerElement.bind to call reflectPropertyToAttribute w/ prop name

pkg/polymer/lib/src/instance.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.
 
 part of polymer;
 
 /**
  * Use this annotation to publish a field as an attribute. For example:
  *
  *     class MyPlaybackElement extends PolymerElement {
@@ skipping 376 matching lines @@
     if (!_elementPrepared) prepareElement();
 
     var property = propertyForAttribute(name);
     if (property != null) {
       unbind(name);
       // use n-way Polymer binding
       var observer = bindProperty(property.simpleName, model, path);
       // reflect bound property to attribute when binding
       // to ensure binding is not left on attribute if property
       // does not update due to not changing.
-      reflectPropertyToAttribute(name);
+      // Dart note: we include this patch:
+      // https://github.com/Polymer/polymer/pull/319
+      reflectPropertyToAttribute(MirrorSystem.getName(property.simpleName));
       return bindings[name] = observer;
     } else {
       // Cannot call super.bind because of
       // https://code.google.com/p/dart/issues/detail?id=13156
       // https://code.google.com/p/dart/issues/detail?id=12456
       return TemplateElement.mdvPackage(this).bind(name, model, path);
     }
   }
 
   void asyncUnbindAll() {
@@ skipping 530 matching lines @@
 /**
  * Base class for PolymerElements deriving from HtmlElement.
  *
  * See [Polymer].
  */
 class PolymerElement extends HtmlElement with Polymer, ObservableMixin {
   PolymerElement.created() : super.created() {
     polymerCreated();
   }
 }