Implementing CustomElement's attributeChanged callback.

tools/dom/src/dart2js_CustomElementSupport.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 dart.dom.html;
 
 _callCreated(receiver) {
   return receiver.createdCallback();
 }
 
 _callEnteredView(receiver) {
   return receiver.enteredView();
 }
 
 _callLeftView(receiver) {
   return receiver.leftView();
 }
+ _callAttributeChanged(receiver, name, oldValue, newValue) {
+  return receiver.attributeChanged(name, oldValue, newValue);
+}
 
 _makeCallbackMethod(callback) {
   return JS('',
       '''((function(invokeCallback) {
              return function() {
                return invokeCallback(this);
              };
           })(#))''',
       convertDartClosureToJS(callback, 1));
 }
 
+_makeCallbackMethod3(callback) {
+  return JS('',
+      '''((function(invokeCallback) {
+             return function(arg1, arg2, arg3) {
+               return invokeCallback(this, arg1, arg2, arg3);
+             };
+          })(#))''',
+      convertDartClosureToJS(callback, 4));
+}
+
 const _typeNameToTag = const {
   'HTMLAnchorElement': 'a',
   'HTMLAudioElement': 'audio',
   'HTMLButtonElement': 'button',
   'HTMLCanvasElement': 'canvas',
   'HTMLDivElement': 'div',
   'HTMLImageElement': 'img',
   'HTMLInputElement': 'input',
   'HTMLLIElement': 'li',
   'HTMLLabelElement': 'label',
@@ skipping 45 matching lines @@
   var baseConstructor = JS('=Object', '#[#]', context, baseClassName);
 
   var properties = JS('=Object', '{}');
 
   JS('void', '#.createdCallback = #', properties,
       JS('=Object', '{value: #}', _makeCallbackMethod(_callCreated)));
   JS('void', '#.enteredViewCallback = #', properties,
       JS('=Object', '{value: #}', _makeCallbackMethod(_callEnteredView)));
   JS('void', '#.leftViewCallback = #', properties,
       JS('=Object', '{value: #}', _makeCallbackMethod(_callLeftView)));
+  JS('void', '#.attributeChangedCallback = #', properties,
+      JS('=Object', '{value: #}', _makeCallbackMethod3(_callAttributeChanged)));
 
   // TODO(blois): Bug 13220- remove once transition is complete
   JS('void', '#.enteredDocumentCallback = #', properties,
       JS('=Object', '{value: #}', _makeCallbackMethod(_callEnteredView)));
   JS('void', '#.leftDocumentCallback = #', properties,
       JS('=Object', '{value: #}', _makeCallbackMethod(_callLeftView)));
 
   var baseProto = JS('=Object', '#.prototype', baseConstructor);
   var proto = JS('=Object', 'Object.create(#, #)', baseProto, properties);
 
@@ skipping 11 matching lines @@
     }
   }
 
   JS('void', '#.register(#, #)', document, tag, options);
 }
 
 //// Called by Element.created to do validation & initialization.
 void _initializeCustomElement(Element e) {
   // TODO(blois): Add validation that this is only in response to an upgrade.
 }