Adding Element.created constructor

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.created();
+  return receiver.createdCallback();
 }
 
 _callEnteredView(receiver) {
   return receiver.enteredView();
 }
 
 _callLeftView(receiver) {
   return receiver.leftView();
 }
 
@@ skipping 91 matching lines @@
   if (baseClassName != 'HTMLElement') {
     if (extendsTagName != null) {
       JS('=Object', '#.extends = #', options, extendsTagName);
     } else if (_typeNameToTag.containsKey(baseClassName)) {
       JS('=Object', '#.extends = #', options, _typeNameToTag[baseClassName]);
     }
   }
 
   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.
+}