Revert "Patched in Dartium JsInterop"

tools/dom/templates/html/impl/impl_WheelEvent.darttemplate

 // Copyright (c) 2012, 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 $LIBRARYNAME;
 
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
 
   factory WheelEvent(String type,
       {Window view, num deltaX: 0, num deltaY: 0, num deltaZ: 0,
@@ skipping 21 matching lines @@
       'altKey': altKey,
       'shiftKey': shiftKey,
       'metaKey': metaKey,
       'relatedTarget': relatedTarget,
     };
 
 $if DART2JS
     if (view == null) {
       view = window;
     }
-
+    
     return JS('WheelEvent', 'new WheelEvent(#, #)',
         type, convertDartToNative_Dictionary(options));
 
 $else
-    return wrap_jso(_blink.BlinkWheelEvent.instance.constructorCallback_2_(type, convertDartToNative_Dictionary(options)));
+    return _blink.BlinkWheelEvent.constructorCallback_2(type, options);
 $endif
   }
 
 $!MEMBERS
 
 $if DART2JS
   /**
    * The amount that is expected to scroll vertically, in units determined by
    * [deltaMode].
    *
@@ skipping 102 matching lines @@
    * [deltaMode].
    *
    * See also:
    *
    * * [WheelEvent.deltaY](http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html#events-WheelEvent-deltaY) from the W3C.
    */
   @DomName('WheelEvent.deltaY')
   num get deltaY => _deltaY;
 $endif
 }