Implement JS_INTERCEPTOR_CONSTANT

tools/dom/src/dart2js_KeyEvent.dart

 /**
  * A custom KeyboardEvent that attempts to eliminate cross-browser
  * inconsistencies, and also provide both keyCode and charCode information
  * for all key events (when such information can be determined).
  *
  * KeyEvent tries to provide a higher level, more polished keyboard event
  * information on top of the "raw" [KeyboardEvent].
  *
  * This class is very much a work in progress, and we'd love to get information
  * on how we can make this class work with as many international keyboards as
@@ skipping 38 matching lines @@
   EventTarget _currentTarget;
 
   /**
    * The value we want to use for this object's dispatch. Created here so it is
    * only invoked once.
    */
   static final _keyboardEventDispatchRecord = _makeRecord();
 
   /** Helper to statically create the dispatch record. */
   static _makeRecord() {
-    var interceptor = findInterceptorForType(KeyboardEvent);
+    var interceptor = JS_INTERCEPTOR_CONSTANT(KeyboardEvent);
     return makeLeafDispatchRecord(interceptor);
   }
 
   /** Construct a KeyEvent with [parent] as the event we're emulating. */
   KeyEvent.wrap(KeyboardEvent parent): super(parent) {
     _parent = parent;
     _shadowAltKey = _realAltKey;
     _shadowCharCode = _realCharCode;
     _shadowKeyCode = _realKeyCode;
     _currentTarget = _parent.currentTarget;
@@ skipping 134 matching lines @@
     throw new UnsupportedError("keyIdentifier is unsupported.");
   }
   void _initKeyboardEvent(String type, bool canBubble, bool cancelable,
       Window view, String keyIdentifier, int keyLocation, bool ctrlKey,
       bool altKey, bool shiftKey, bool metaKey,
       bool altGraphKey) {
     throw new UnsupportedError(
         "Cannot initialize a KeyboardEvent from a KeyEvent.");
   }
 }