Move isValid/isCurrentColor from Color to StyleColor

Source/core/rendering/style/StyleInheritedData.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef StyleInheritedData_h
 #define StyleInheritedData_h
 
+#include "core/css/StyleColor.h"
 #include "core/platform/Length.h"
-#include "core/platform/graphics/Color.h"
 #include "core/platform/graphics/Font.h"
 #include <wtf/PassRefPtr.h>
 #include <wtf/RefCounted.h>
 #include <wtf/RefPtr.h>
 
 namespace WebCore {
 
 class StyleInheritedData : public RefCounted<StyleInheritedData> {
 public:
     static PassRefPtr<StyleInheritedData> create() { return adoptRef(new StyleInheritedData); }
     PassRefPtr<StyleInheritedData> copy() const { return adoptRef(new StyleInheritedData(*this)); }
     ~StyleInheritedData();
 
     bool operator==(const StyleInheritedData& o) const;
     bool operator!=(const StyleInheritedData& o) const
     {
         return !(*this == o);
     }
 
     short horizontal_border_spacing;
     short vertical_border_spacing;
 
     // could be packed in a short but doesn't
     // make a difference currently because of padding
     Length line_height;
 
     Font font;
-    Color color;
-    Color visitedLinkColor;
+    StyleColor color;
+    StyleColor visitedLinkColor;
 
 private:
     StyleInheritedData();
     StyleInheritedData(const StyleInheritedData&);
 };
 
 } // namespace WebCore
 
 #endif // StyleInheritedData_h