Roll IDL to multivm@910, Take #2

third_party/WebCore/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
@@ skipping 21 matching lines @@
         JSGenerateIsReachable=Impl,
         ActiveDOMObject,
         EventTarget,
         JSNoStaticTables
     ] 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);
+
+#if defined(ENABLE_LEGACY_VENDOR_PREFIXES) && ENABLE_LEGACY_VENDOR_PREFIXES
         [Custom] void webkitPostMessage(in any message, in [Optional] Array transfer)
             raises(DOMException);
+#endif // defined(ENABLE_LEGACY_VENDOR_PREFIXES) && ENABLE_LEGACY_VENDOR_PREFIXES
+
         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
     };
 
 }