Fixing status of register test on IE

pkg/polymer/lib/src/declaration.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;
 
 /**
  * **Warning**: this class is experiental and subject to change.
  *
  * The implementation for the `polymer-element` element.
@@ skipping 223 matching lines @@
 
   }
 
   void registerType(String name) {
     var baseTag;
     var decl = this;
     while (decl != null) {
       baseTag = decl.attributes['extends'];
       decl = decl.superDeclaration;
     }
-    // native element must be specified in extends
-    var nativeExtends = baseTag;
-    document.register(name, type, extendsTag: nativeExtends);
+    document.register(name, type, extendsTag: baseTag);
   }
 
   void publishAttributes(ClassMirror cls, PolymerDeclaration superDecl) {
     // get properties to publish
     if (superDecl != null && superDecl._publish != null) {
       _publish = new Map.from(superDecl._publish);
     }
     _publish = _getProperties(cls, _publish, (x) => x is PublishedProperty);
 
     // merge names from 'attributes' attribute
@@ skipping 425 matching lines @@
   return map;
 }();
 
 // Dart note: we need this function because we have additional renames JS does
 // not have. The JS renames are simply case differences, whereas we have ones
 // like doubleclick -> dblclick and stripping the webkit prefix.
 String _eventNameFromType(String eventType) {
   final result = _reverseEventTranslations[eventType];
   return result != null ? result : eventType;
 }