Moving GraphicsContext and dependencies from core to platform.

Source/web/ScrollbarGroup.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 10 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "ScrollbarGroup.h"
 
 #include "WebPluginScrollbarImpl.h"
 #include "core/frame/FrameView.h"
-#include "core/platform/Scrollbar.h"
-#include "core/platform/ScrollbarTheme.h"
+#include "platform/scroll/Scrollbar.h"
+#include "platform/scroll/ScrollbarTheme.h"
 #include "public/platform/WebRect.h"
 
 using namespace WebCore;
 
 namespace blink {
 
 ScrollbarGroup::ScrollbarGroup(FrameView* frameView, const IntRect& frameRect)
     : m_frameView(frameView)
     , m_frameRect(frameRect)
     , m_horizontalScrollbar(0)
@@ skipping 243 matching lines @@
     }
 
     int pageStep = std::max(
         static_cast<int>(static_cast<float>(length) * ScrollableArea::minFractionToStepWhenPaging()),
         length - ScrollableArea::maxOverlapBetweenPages());
 
     return std::max(pageStep, 1);
 }
 
 } // namespace blink