Moving GraphicsContext and dependencies from core to platform.

Source/platform/graphics/skia/OpaqueRegionSkia.h

 /*
  * Copyright (c) 2012, 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 OpaqueRegionSkia_h
 #define OpaqueRegionSkia_h
 
+#include "platform/PlatformExport.h"
 #include "platform/geometry/IntRect.h"
 
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkPoint.h"
 #include "SkRect.h"
 
 namespace WebCore {
 class GraphicsContext;
 
 // This class is an encapsulation of functionality for GraphicsContext, and its methods are mirrored
 // there for the outside world. It tracks paints and computes what area will be opaque.
-class OpaqueRegionSkia FINAL {
+class PLATFORM_EXPORT OpaqueRegionSkia FINAL {
 public:
     OpaqueRegionSkia();
 
     // The resulting opaque region as a single rect.
     IntRect asRect() const;
 
     void pushCanvasLayer(const SkPaint*);
     void popCanvasLayer(const GraphicsContext*);
 
     void setImageMask(const SkRect& imageOpaqueRect);
@@ skipping 34 matching lines @@
 
     SkRect& currentTrackingOpaqueRect();
 
     SkRect m_opaqueRect;
 
     Vector<CanvasLayerState, 3> m_canvasLayerStack;
 };
 
 }
 #endif // OpaqueRegionSkia_h