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

Source/core/rendering/style/StyleRareInheritedData.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 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 15 matching lines @@
 #include "core/rendering/style/QuotesData.h"
 #include "core/rendering/style/RenderStyle.h"
 #include "core/rendering/style/RenderStyleConstants.h"
 #include "core/rendering/style/ShadowData.h"
 #include "core/rendering/style/StyleImage.h"
 
 namespace WebCore {
 
 struct SameSizeAsStyleRareInheritedData : public RefCounted<SameSizeAsStyleRareInheritedData> {
     void* styleImage;
-    StyleColor firstColor;
+    Color firstColor;
     float firstFloat;
-    StyleColor colors[5];
+    Color colors[5];
     void* ownPtrs[1];
     AtomicString atomicStrings[5];
     void* refPtrs[2];
     Length lengths[1];
     float secondFloat;
     unsigned m_bitfields[2];
     short pagedMediaShorts[2];
     unsigned unsigneds[1];
     short hyphenationShorts[3];
 
-    StyleColor touchColors;
+    Color touchColors;
 
     void* variableDataRefs[1];
 };
 
 COMPILE_ASSERT(sizeof(StyleRareInheritedData) == sizeof(SameSizeAsStyleRareInheritedData), StyleRareInheritedData_should_bit_pack);
 
 StyleRareInheritedData::StyleRareInheritedData()
     : listStyleImage(RenderStyle::initialListStyleImage())
     , textStrokeWidth(RenderStyle::initialTextStrokeWidth())
     , indent(RenderStyle::initialTextIndent())
@@ skipping 161 matching lines @@
 bool StyleRareInheritedData::shadowDataEquivalent(const StyleRareInheritedData& o) const
 {
     if ((!textShadow && o.textShadow) || (textShadow && !o.textShadow))
         return false;
     if (textShadow && o.textShadow && (*textShadow != *o.textShadow))
         return false;
     return true;
 }
 
 } // namespace WebCore