Dartium KeyEvent fix.

tools/dom/src/dartium_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 52 matching lines @@
   /** Programmatically create a new KeyEvent (and KeyboardEvent). */
    factory KeyEvent(String type,
       {Window view, bool canBubble: true, bool cancelable: true, int keyCode: 0,
       int charCode: 0, int keyLocation: 1, bool ctrlKey: false,
       bool altKey: false, bool shiftKey: false, bool metaKey: false,
       bool altGraphKey: false, EventTarget currentTarget}) {
      var parent = new KeyboardEvent(type, view: view, canBubble: canBubble,
         cancelable: cancelable, keyLocation: keyLocation, ctrlKey: ctrlKey,
         altKey: altKey, shiftKey: shiftKey, metaKey: metaKey, altGraphKey:
         altGraphKey);
-     var keyEvent = KeyEvent.wrap(parent);
+     var keyEvent = new KeyEvent.wrap(parent);
       keyEvent._shadowAltKey = altKey;
       keyEvent._shadowCharCode = charCode;
       keyEvent._shadowKeyCode = keyCode;
       keyEvent._currentTarget = currentTarget == null ? window : currentTarget;
       return keyEvent;
    }
 
   /** Accessor to provide a stream of KeyEvents on the desired target. */
   static EventStreamProvider<KeyEvent> keyDownEvent =
     new _KeyboardEventHandler('keydown');
@@ skipping 39 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.");
   }
 }