Update WebKit IDLs after chrome roll.

dom/MessagePort.idl

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2011 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  *
  */
 
 [
-    JSCustomMarkFunction,
-    JSGenerateIsReachable=Impl,
     ActiveDOMObject,
-    EventTarget,
-    JSNoStaticTables
+    EventTarget
 ] interface MessagePort {
 // We need to have something as an ObjC binding, because MessagePort is used in MessageEvent, which already has one,
 // but we don't want to actually expose the API while it is in flux.
 #if defined(LANGUAGE_JAVASCRIPT) && LANGUAGE_JAVASCRIPT
     [Custom] void postMessage(in any message, in [Optional] Array messagePorts)
         raises(DOMException);
 
     void start();
     void close();
 
     // event handler attributes
     attribute EventListener onmessage;
 
     // EventTarget interface
     void addEventListener(in DOMString type, 
                           in EventListener listener, 
                           in [Optional] boolean useCapture);
     void removeEventListener(in DOMString type, 
                              in EventListener listener, 
                              in [Optional] boolean useCapture);
     boolean dispatchEvent(in Event evt)
         raises(EventException);
 #endif
 };