Revert "Roll IDL to multivm@910"

third_party/WebCore/dom/Document.idl

 /*
  * Copyright (C) 2006, 2007, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006, 2007 Samuel Weinig <sam@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 219 matching lines @@
         [ObjCUseDefaultView] CSSRuleList getMatchedCSSRules(in Element element,
                                                   in DOMString pseudoElement);
         [ObjCUseDefaultView] CSSRuleList getMatchedCSSRules(in Element element,
                                                   in DOMString pseudoElement,
                                                   in [Optional] boolean authorOnly);
                                                   
 #endif
 
 #if !defined(LANGUAGE_CPP) || !LANGUAGE_CPP
 #if !defined(LANGUAGE_OBJECTIVE_C) || !LANGUAGE_OBJECTIVE_C
-        CanvasRenderingContext getCSSCanvasContext(in DOMString contextId, in DOMString name, in long width, in long height);
+        [V8Custom] DOMObject getCSSCanvasContext(in DOMString contextId, in DOMString name, in long width, in long height);
 #endif
 #endif
 
         // HTML 5
         NodeList getElementsByClassName(in [Optional=DefaultIsUndefined] DOMString tagname);
 
         readonly attribute DOMString compatMode;
 
         // NodeSelector - Selector API
         Element querySelector(in DOMString selectors)
@@ skipping 122 matching lines @@
         // Page visibility API.
         readonly attribute [Conditional=PAGE_VISIBILITY_API] DOMString webkitVisibilityState;
         readonly attribute [Conditional=PAGE_VISIBILITY_API] boolean webkitHidden;
 
         // Security Policy API: http://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html#script-interfaces
         readonly attribute [Conditional=CSP_NEXT] DOMSecurityPolicy SecurityPolicy;
 
     };
 
 }