Fixing performance issue of creating imagebitmap from ImageData

third_party/WebKit/Source/platform/graphics/UnacceleratedImageBufferSurface.h

 /*
  * 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 23 matching lines @@
 #include "platform/graphics/ImageBufferSurface.h"
 #include "wtf/RefPtr.h"
 
 class SkSurface;
 
 namespace blink {
 
 class PLATFORM_EXPORT UnacceleratedImageBufferSurface : public ImageBufferSurface {
     WTF_MAKE_NONCOPYABLE(UnacceleratedImageBufferSurface); WTF_MAKE_FAST_ALLOCATED(UnacceleratedImageBufferSurface);
 public:
-    UnacceleratedImageBufferSurface(const IntSize&, OpacityMode = NonOpaque);
+    UnacceleratedImageBufferSurface(const IntSize&, OpacityMode = NonOpaque, ImageInitializationMode = InitializeImagePixels);
     ~UnacceleratedImageBufferSurface() override;
 
     SkCanvas* canvas() override;
     bool isValid() const override;
     const SkBitmap& deprecatedBitmapForOverwrite() override;
 
     PassRefPtr<SkImage> newImageSnapshot(AccelerationHint) override;
 private:
     RefPtr<SkSurface> m_surface;
 };
 
 } // namespace blink
 
 #endif