Remove CSSCanvas values.

sky/engine/core/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 48 matching lines @@
 
     Element            elementFromPoint([Default=Undefined] optional long x,
                                         [Default=Undefined] optional long y);
     [MeasureAs=DocumentCaretRangeFromPoint]
     Range              caretRangeFromPoint([Default=Undefined] optional long x,
                                            [Default=Undefined] optional long y);
 
     // Mozilla extensions
     Selection          getSelection();
 
-    [MeasureAs=DocumentGetCSSCanvasContext] RenderingContext getCSSCanvasContext(DOMString contextId, DOMString name, long width, long height);
-
     // HTML 5
     readonly attribute Element activeElement;
     boolean hasFocus();
 
     [CallWith=ScriptState, CustomElementCallbacks, RaisesException, MeasureAs=DocumentRegisterElement] CustomElementConstructor registerElement(DOMString name, optional Dictionary options);
 
     // Page visibility API.
     readonly attribute DOMString visibilityState;
     readonly attribute boolean hidden;
 
     readonly attribute HTMLScriptElement currentScript;
 };
 
 Document implements ParentNode;