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

Source/core/page/Frame.h

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999-2001 Lars Knoll <knoll@kde.org>
  *                     1999-2001 Antti Koivisto <koivisto@kde.org>
  *                     2000-2001 Simon Hausmann <hausmann@kde.org>
  *                     2000-2001 Dirk Mueller <mueller@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
@@ skipping 10 matching lines @@
  *
  * 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 Frame_h
 #define Frame_h
 
-#include "core/css/StyleColor.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/NavigationScheduler.h"
 #include "core/page/AdjustViewSizeOrNot.h"
 #include "core/page/FrameTree.h"
 #include "core/platform/ScrollTypes.h"
 #include "core/platform/graphics/IntSize.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
@@ skipping 24 matching lines @@
     class TreeScope;
     class VisiblePosition;
     class Widget;
 
     class Frame : public RefCounted<Frame> {
     public:
         static PassRefPtr<Frame> create(Page*, HTMLFrameOwnerElement*, FrameLoaderClient*);
 
         void init();
         void setView(PassRefPtr<FrameView>);
-        void createView(const IntSize&, const StyleColor&, bool,
+        void createView(const IntSize&, const Color&, bool,
             const IntSize& fixedLayoutSize = IntSize(), bool useFixedLayout = false, ScrollbarMode = ScrollbarAuto, bool horizontalLock = false,
             ScrollbarMode = ScrollbarAuto, bool verticalLock = false);
 
         ~Frame();
 
         void addDestructionObserver(FrameDestructionObserver*);
         void removeDestructionObserver(FrameDestructionObserver*);
 
         void willDetachPage();
         void detachFromPage();
@@ skipping 189 matching lines @@
     }
 
     inline EventHandler* Frame::eventHandler() const
     {
         return m_eventHandler.get();
     }
 
 } // namespace WebCore
 
 #endif // Frame_h