Refactoring ImageBuffer to decouple it from Canvas2DLayerBridge

Source/platform/graphics/UnacceleratedImageBufferSurface.cpp

 /*
  * 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:
  *
  *     * 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 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * 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 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
-