Make 2D canvas smarter about chosing whether or not to use GPU acceleration

third_party/WebKit/Source/core/html/HTMLVideoElement.h

 /*
  * Copyright (C) 2007, 2008, 2009, 2010 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 60 matching lines @@
     // Used by WebGL to do GPU-GPU textures copy if possible.
     bool copyVideoTextureToPlatformTexture(WebGraphicsContext3D*, Platform3DObject texture, GLenum internalFormat, GLenum type, bool premultiplyAlpha, bool flipY);
 
     bool shouldDisplayPosterImage() const { return displayMode() == Poster; }
 
     bool hasAvailableVideoFrame() const;
 
     KURL posterImageURL() const override;
 
     // CanvasImageSource implementation
-    PassRefPtr<Image> getSourceImageForCanvas(SourceImageStatus*) const override;
+    PassRefPtr<Image> getSourceImageForCanvas(SourceImageStatus*, AccelerationHint) const override;
     bool isVideoElement() const override { return true; }
     bool wouldTaintOrigin(SecurityOrigin*) const override;
     FloatSize elementSize() const override;
     const KURL& sourceURL() const override { return currentSrc(); }
 
     bool isHTMLVideoElement() const override { return true; }
 
 private:
     HTMLVideoElement(Document&);
 
@@ skipping 12 matching lines @@
     void setDisplayMode(DisplayMode) override;
 
     OwnPtrWillBeMember<HTMLImageLoader> m_imageLoader;
 
     AtomicString m_defaultPosterURL;
 };
 
 } // namespace blink
 
 #endif // HTMLVideoElement_h