Moving GraphicsContext and dependencies from core to platform.

Source/web/PinchViewports.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #include "config.h"
 #include "PinchViewports.h"
 
 #include "WebSettingsImpl.h"
 #include "WebViewImpl.h"
 #include "core/frame/Frame.h"
 #include "core/frame/FrameView.h"
 #include "core/page/scrolling/ScrollingCoordinator.h"
-#include "core/platform/Scrollbar.h"
-#include "core/platform/graphics/GraphicsLayer.h"
 #include "core/rendering/RenderLayerCompositor.h"
 #include "platform/geometry/FloatSize.h"
+#include "platform/graphics/GraphicsLayer.h"
+#include "platform/scroll/Scrollbar.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebCompositorSupport.h"
 #include "public/platform/WebLayer.h"
 #include "public/platform/WebLayerTreeView.h"
 #include "public/platform/WebScrollbarLayer.h"
 
 using WebCore::GraphicsLayer;
 
 namespace blink {
 
@@ skipping 154 matching lines @@
     } else if (graphicsLayer == m_overlayScrollbarVertical.get()) {
         name =  "Overlay Scrollbar Vertical Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink