Moving GraphicsContext and dependencies from core to platform.

Source/platform/graphics/Gradient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Torch Mobile, Inc.
  * 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:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 11 matching lines @@
  * 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 Gradient_h
 #define Gradient_h
 
+#include "platform/PlatformExport.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/graphics/GraphicsTypes.h"
 #include "platform/transforms/AffineTransform.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 class SkShader;
 
 namespace WebCore {
 
 class Color;
 class FloatRect;
 class IntSize;
 
-class Gradient : public RefCounted<Gradient> {
+class PLATFORM_EXPORT Gradient : public RefCounted<Gradient> {
 public:
     static PassRefPtr<Gradient> create(const FloatPoint& p0, const FloatPoint& p1)
     {
         return adoptRef(new Gradient(p0, p1));
     }
     static PassRefPtr<Gradient> create(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1, float aspectRatio = 1)
     {
         return adoptRef(new Gradient(p0, r0, p1, r1, aspectRatio));
     }
     ~Gradient();
@@ skipping 88 matching lines @@
     AffineTransform m_gradientSpaceTransformation;
 
     bool m_drawInPMColorSpace;
 
     RefPtr<SkShader> m_gradient;
 };
 
 } // namespace WebCore
 
 #endif