Update WebKit IDLs after chrome roll.

xml/XMLHttpRequest.idl

 /*
  * Copyright (C) 2008, 2011 Apple 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 23 matching lines @@
 //    FIXME: enable once support for json responseText is completed. (bug #73648)
 //    "json",
     "text"
 };
 
 [
     ActiveDOMObject,
     Constructor,
     CallWith=ScriptExecutionContext,
     V8CustomConstructor,
-    JSCustomMarkFunction,
-    EventTarget,
-    JSNoStaticTables
+    EventTarget
 ] interface XMLHttpRequest {
     // From XMLHttpRequestEventTarget
     // event handler attributes
     attribute EventListener onabort;
     attribute EventListener onerror;
     attribute EventListener onload;
     attribute EventListener onloadend;
     attribute EventListener onloadstart;
     attribute EventListener onprogress;
     [Conditional=XHR_TIMEOUT] attribute EventListener ontimeout;
@@ skipping 54 matching lines @@
     // 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);
 };