Refactoring ImageBuffer to decouple it from Canvas2DLayerBridge

Source/core/platform/graphics/gpu/NonDrawableAcceleratedImageBufferSurface.h

Index: Source/core/platform/graphics/gpu/NonDrawableAcceleratedImageBufferSurface.h
diff --git a/Source/core/platform/graphics/GaneshUtils.h b/Source/core/platform/graphics/gpu/NonDrawableAcceleratedImageBufferSurface.h
similarity index 63%
copy from Source/core/platform/graphics/GaneshUtils.h
copy to Source/core/platform/graphics/gpu/NonDrawableAcceleratedImageBufferSurface.h
index a86b0efb597435880efd77b9d991c2fa102fd756..c74bbb3e143366590b4b3006e74bdda99b21eb4f 100644
--- a/Source/core/platform/graphics/GaneshUtils.h
+++ b/Source/core/platform/graphics/gpu/NonDrawableAcceleratedImageBufferSurface.h
@@ -28,17 +28,32 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef GaneshUtils_h
-#define GaneshUtils_h
+#ifndef NonDrawableAcceleratedImageBufferSurface_h
+#define NonDrawableAcceleratedImageBufferSurface_h
 
-#include "platform/geometry/IntSize.h"
+#include "platform/graphics/ImageBufferSurface.h"
 #include "third_party/skia/include/core/SkBitmap.h"
-#include "third_party/skia/include/gpu/GrContext.h"
 
 namespace WebCore {
 
-bool ensureTextureBackedSkBitmap(GrContext*, SkBitmap&, const IntSize&, GrSurfaceOrigin, GrPixelConfig);
+// This is a GPU backed surface that has no canvas or render target.
+class NonDrawableAcceleratedImageBufferSurface : public ImageBufferSurface {
+    WTF_MAKE_NONCOPYABLE(NonDrawableAcceleratedImageBufferSurface); WTF_MAKE_FAST_ALLOCATED;
+public:
+    NonDrawableAcceleratedImageBufferSurface(const IntSize&, OpacityMode = NonOpaque, float resolutionScale = 1.0f);
+    virtual ~NonDrawableAcceleratedImageBufferSurface() { }
+
+    virtual SkCanvas* canvas() const OVERRIDE { return 0; }
+    virtual const SkBitmap& bitmap() const OVERRIDE { return m_bitmap; }
+    virtual bool isValid() const OVERRIDE { return m_bitmap.pixelRef(); }
+    virtual bool isAccelerated() const OVERRIDE { return true; }
+    virtual Platform3DObject getBackingTexture() const OVERRIDE;
+
+private:
+    SkBitmap m_bitmap;
+};
+
 
 } // namespace WebCore
 
-#endif // GaneshUtils_h
+#endif