Call .created constructor on dart2js custom elements

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();
+_callConstructor(constructor) {
+  return (receiver) {
+    return JS('', '#(#)', constructor, receiver);
+  };
 }
 
 _callEnteredView(receiver) {
   return receiver.enteredView();
 }
 
 _callLeftView(receiver) {
   return receiver.leftView();
 }
  _callAttributeChanged(receiver, name, oldValue, newValue) {
@@ skipping 58 matching lines @@
   //    });
   //    document.register('x-foo', { prototype: proto });
   //    ...
   //    var e = document.createElement('x-foo');
 
   var interceptorClass = findInterceptorConstructorForType(type);
   if (interceptorClass == null) {
     throw new ArgumentError(type);
   }
 
+  var constructor = findConstructorForWebComponentType(type, 'created');
+  if (constructor == null) {
+    throw new ArgumentError("$type has no constructor called 'created'");
+  }
+
   // Workaround for 13190- use an article element to ensure that HTMLElement's
   // interceptor is resolved correctly.
   getNativeInterceptor(new Element.tag('article'));
 
   String baseClassName = findDispatchTagForInterceptorClass(interceptorClass);
   if (baseClassName == null) {
     throw new ArgumentError(type);
   }
   if (baseClassName == 'Element') baseClassName = 'HTMLElement';
 
   var baseConstructor = JS('=Object', '#[#]', context, baseClassName);
 
   var properties = JS('=Object', '{}');
 
   JS('void', '#.createdCallback = #', properties,
-      JS('=Object', '{value: #}', _makeCallbackMethod(_callCreated)));
+      JS('=Object', '{value: #}',
+          _makeCallbackMethod(_callConstructor(constructor))));
   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)));
@@ skipping 17 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.
 }