Moving GraphicsContext and dependencies from core to platform.

Source/platform/scroll/ScrollbarThemeOverlayMock.h

 /*
  * 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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 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.
  */
 
 #ifndef ScrollbarThemeOverlayMock_h
 #define ScrollbarThemeOverlayMock_h
 
-#include "core/platform/ScrollbarThemeOverlay.h"
+#include "platform/scroll/ScrollbarThemeOverlay.h"
 
 namespace WebCore {
 
-class ScrollbarThemeOverlayMock : public ScrollbarThemeOverlay {
+class PLATFORM_EXPORT ScrollbarThemeOverlayMock : public ScrollbarThemeOverlay {
 public:
     ScrollbarThemeOverlayMock() : ScrollbarThemeOverlay(3, 4, DisallowHitTest, Color(128, 128, 128)) { }
 
 private:
     virtual bool isMockTheme() const OVERRIDE FINAL { return true; }
 };
 
 } // namespace WebCore
 #endif // ScrollbarThemeOverlayMock_h