Refactoring ImageBuffer to decouple it from Canvas2DLayerBridge

Source/platform/graphics/UnacceleratedImageBufferSurface.cpp

Index: Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
diff --git a/Source/core/platform/graphics/GaneshUtils.h b/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
similarity index 73%
copy from Source/core/platform/graphics/GaneshUtils.h
copy to Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
index a86b0efb597435880efd77b9d991c2fa102fd756..90f5c20b305fd1775837d00b658daa19907d4366 100644
--- a/Source/core/platform/graphics/GaneshUtils.h
+++ b/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
@@ -28,17 +28,25 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef GaneshUtils_h
-#define GaneshUtils_h
+#include "config.h"
 
-#include "platform/geometry/IntSize.h"
-#include "third_party/skia/include/core/SkBitmap.h"
-#include "third_party/skia/include/gpu/GrContext.h"
+#include "platform/graphics/UnacceleratedImageBufferSurface.h"
+
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
 
-bool ensureTextureBackedSkBitmap(GrContext*, SkBitmap&, const IntSize&, GrSurfaceOrigin, GrPixelConfig);
+UnacceleratedImageBufferSurface::UnacceleratedImageBufferSurface(const IntSize& size, OpacityMode opacityMode, float resolutionScale)
+    : ImageBufferSurface(size, opacityMode, resolutionScale)
+{
+    SkBitmap bitmap;
+    bitmap.setConfig(SkBitmap::kARGB_8888_Config, size.width(), size.height());
+    bitmap.allocPixels();
+    if (bitmap.isNull())
+        return;
+    m_canvas = adoptPtr(new SkCanvas(bitmap));
+    clear();
+}
 
 } // namespace WebCore
-
-#endif // GaneshUtils_h