Refactoring ImageBuffer to decouple it from Canvas2DLayerBridge

Source/platform/graphics/UnacceleratedImageBufferSurface.cpp

Index: Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
diff --git a/Source/core/rendering/LayoutRectRecorder.h b/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
similarity index 74%
copy from Source/core/rendering/LayoutRectRecorder.h
copy to Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
index c92eb5efc90d50bfbac57653cda3a1c84df4b4b2..40812df5e776038dbafc423a578370ea08678312 100644
--- a/Source/core/rendering/LayoutRectRecorder.h
+++ b/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
@@ -28,31 +28,24 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef LayoutRectRecorder_h
-#define LayoutRectRecorder_h
+#include "config.h"
+#include "platform/graphics/UnacceleratedImageBufferSurface.h"
 
-#include "platform/geometry/LayoutRect.h"
-#include "wtf/Noncopyable.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
 
-class RenderLayerModelObject;
-class RenderObject;
-
-class LayoutRectRecorder {
-    WTF_MAKE_NONCOPYABLE(LayoutRectRecorder);
-public:
-    LayoutRectRecorder(RenderObject&, bool skipRecording = false);
-    ~LayoutRectRecorder();
-
-    static bool shouldRecordLayoutRects();
-
-private:
-    RenderObject& m_object;
-    bool m_skipRecording;
-};
+UnacceleratedImageBufferSurface::UnacceleratedImageBufferSurface(const IntSize& size, OpacityMode opacityMode)
+    : ImageBufferSurface(size, opacityMode)
+{
+    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 // LayoutRectRecorder_h
-