fix todomvc tests

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;
 
-_callConstructor(constructor) {
+_callConstructor(constructor, interceptor) {
   return (receiver) {
+    setNativeSubclassDispatchRecord(receiver, interceptor);
+
     return JS('', '#(#)', constructor, receiver);
   };
 }
 
 _callEnteredView(receiver) {
   return receiver.enteredView();
 }
 
 _callLeftView(receiver) {
   return receiver.leftView();
@@ skipping 36 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 interceptor = JS('=Object', '#.prototype', interceptorClass);
+
   var constructor = findConstructorForNativeSubclassType(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);
@@ skipping 12 matching lines @@
       throw new UnsupportedError('extendsTag does not match base native class');
     }
   }
 
   var baseConstructor = JS('=Object', '#[#]', context, baseClassName);
 
   var properties = JS('=Object', '{}');
 
   JS('void', '#.createdCallback = #', properties,
       JS('=Object', '{value: #}',
-          _makeCallbackMethod(_callConstructor(constructor))));
+          _makeCallbackMethod(_callConstructor(constructor, interceptor))));
   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);
 
-  var interceptor = JS('=Object', '#.prototype', interceptorClass);
-
   setNativeSubclassDispatchRecord(proto, interceptor);
 
   var options = JS('=Object', '{prototype: #}', proto);
 
   if (baseClassName != 'HTMLElement') {
     if (extendsTagName != null) {
       JS('=Object', '#.extends = #', options, extendsTagName);
     }
   }
 
   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.
 }