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

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

 /*
  * 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 266 matching lines @@
 }
 
 KURL HTMLVideoElement::posterImageURL() const
 {
     String url = stripLeadingAndTrailingHTMLSpaces(imageSourceURL());
     if (url.isEmpty())
         return KURL();
     return document().completeURL(url);
 }
 
-PassRefPtr<Image> HTMLVideoElement::getSourceImageForCanvas(SourceImageStatus* status) const
+PassRefPtr<Image> HTMLVideoElement::getSourceImageForCanvas(SourceImageStatus* status, AccelerationHint) const
 {
     if (!hasAvailableVideoFrame()) {
         *status = InvalidSourceImageStatus;
         return nullptr;
     }
 
     IntSize intrinsicSize(videoWidth(), videoHeight());
+    // FIXME: Not sure if we dhould we be doing anything with the AccelerationHint argument here?
     OwnPtr<ImageBuffer> imageBuffer = ImageBuffer::create(intrinsicSize);
     if (!imageBuffer) {
         *status = InvalidSourceImageStatus;
         return nullptr;
     }
 
     paintCurrentFrame(imageBuffer->canvas(), IntRect(IntPoint(0, 0), intrinsicSize), nullptr);
     RefPtr<Image> snapshot = imageBuffer->newImageSnapshot();
     if (!snapshot) {
         *status = InvalidSourceImageStatus;
         return nullptr;
     }
 
     *status = NormalSourceImageStatus;
     return snapshot.release();
 }
 
 bool HTMLVideoElement::wouldTaintOrigin(SecurityOrigin* destinationSecurityOrigin) const
 {
     return !isMediaDataCORSSameOrigin(destinationSecurityOrigin);
 }
 
 FloatSize HTMLVideoElement::elementSize() const
 {
     return FloatSize(videoWidth(), videoHeight());
 }
 
 } // namespace blink