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

third_party/WebKit/Source/platform/graphics/RecordingImageBufferSurface.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "platform/graphics/RecordingImageBufferSurface.h"
 
 #include "platform/graphics/ExpensiveCanvasHeuristicParameters.h"
 #include "platform/graphics/GraphicsContext.h"
@@ skipping 79 matching lines @@
         currentPicture->playback(m_fallbackSurface->canvas());
         m_currentFrame.clear();
     }
 
     if (m_imageBuffer) {
         m_imageBuffer->resetCanvas(m_fallbackSurface->canvas());
     }
 
 }
 
-PassRefPtr<SkImage> RecordingImageBufferSurface::newImageSnapshot()
+PassRefPtr<SkImage> RecordingImageBufferSurface::newImageSnapshot(AccelerationHint hint)
 {
     if (!m_fallbackSurface)
         fallBackToRasterCanvas();
-    return m_fallbackSurface->newImageSnapshot();
+    return m_fallbackSurface->newImageSnapshot(hint);
 }
 
 SkCanvas* RecordingImageBufferSurface::canvas()
 {
     if (m_fallbackSurface)
         return m_fallbackSurface->canvas();
 
     ASSERT(m_currentFrame->getRecordingCanvas());
     return m_currentFrame->getRecordingCanvas();
 }
@@ skipping 164 matching lines @@
 
 void RecordingImageBufferSurface::setIsHidden(bool hidden)
 {
     if (m_fallbackSurface)
         m_fallbackSurface->setIsHidden(hidden);
     else
         ImageBufferSurface::setIsHidden(hidden);
 }
 
 } // namespace blink