Revert 79985 - 2011-03-01 Nikolas Zimmermann <nzimmermann@rim.com>

Source/WebCore/css/CSSValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * 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 32 matching lines @@
     };
 
     virtual ~CSSValue() { }
 
     // FIXME: Change this to return UnitTypes.
     virtual unsigned short cssValueType() const { return CSS_CUSTOM; }
 
     virtual String cssText() const = 0;
     void setCssText(const String&, ExceptionCode&) { } // FIXME: Not implemented.
 
-    virtual bool isMutableValue() const { return false; }
-
     virtual bool isBorderImageValue() const { return false; }
     virtual bool isCursorImageValue() const { return false; }
     virtual bool isFontFamilyValue() const { return false; }
     virtual bool isFontValue() const { return false; }
     virtual bool isImageGeneratorValue() const { return false; }
     virtual bool isImageValue() const { return false; }
     virtual bool isImplicitInitialValue() const { return false; }
     virtual bool isPrimitiveValue() const { return false; }
     virtual bool isReflectValue() const { return false; }
     virtual bool isShadowValue() const { return false; }
     virtual bool isTimingFunctionValue() const { return false; }
     virtual bool isValueList() const { return false; }
     virtual bool isWebKitCSSTransformValue() const { return false; }
     virtual bool isCSSLineBoxContainValue() const { return false; }
     
 #if ENABLE(SVG)
     virtual bool isSVGColor() const { return false; }
     virtual bool isSVGPaint() const { return false; }
 #endif
 
     virtual void addSubresourceStyleURLs(ListHashSet<KURL>&, const CSSStyleSheet*) { }
 };
 
 } // namespace WebCore
 
 #endif // CSSValue_h