Revert r154797: "Move isValid/isCurrentColor from Color to StyleColor"

Source/core/css/resolver/StyleResolverState.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 83 matching lines @@
 
     ElementStyleResources& elementStyleResources() { return m_elementStyleResources; }
     const CSSToStyleMap& styleMap() const { return m_styleMap; }
     CSSToStyleMap& styleMap() { return m_styleMap; }
 
     // FIXME: Once styleImage can be made to not take a StyleResolverState
     // this convenience function should be removed. As-is, without this, call
     // sites are extremely verbose.
     PassRefPtr<StyleImage> styleImage(CSSPropertyID propertyId, CSSValue* value)
     {
-        return m_elementStyleResources.styleImage(document().textLinkColors(), propertyId, value);
+        return m_elementStyleResources.styleImage(document().textLinkColors(), style()->visitedDependentColor(CSSPropertyColor), propertyId, value);
     }
 
     FontBuilder& fontBuilder() { return m_fontBuilder; }
     // FIXME: These exist as a primitive way to track mutations to font-related properties
     // on a RenderStyle. As designed, these are very error-prone, as some callers
     // set these directly on the RenderStyle w/o telling us. Presumably we'll
     // want to design a better wrapper around RenderStyle for tracking these mutations
     // and separate it from StyleResolverState.
     const FontDescription& parentFontDescription() { return m_parentStyle->fontDescription(); }
     void setZoom(float f) { m_fontBuilder.didChangeFontParameters(m_style->setZoom(f)); }
@@ skipping 45 matching lines @@
     ElementStyleResources m_elementStyleResources;
     // CSSToStyleMap is a pure-logic class and only contains
     // a back-pointer to this object.
     CSSToStyleMap m_styleMap;
     Vector<AtomicString> m_contentAttrValues;
 };
 
 } // namespace WebCore
 
 #endif // StyleResolverState_h