Fix display list canvas fallback to GPU accelerated mode

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/GraphicsContext.h"
 #include "platform/graphics/ImageBuffer.h"
@@ skipping 85 matching lines @@
         RefPtr<SkPicture> currentPicture = adoptRef(m_currentFrame->endRecording());
         currentPicture->draw(m_fallbackSurface->canvas());
         m_currentFrame.clear();
         if (savedState)
             setCurrentState(m_fallbackSurface->canvas(), &stateStack);
     }
 
     if (m_imageBuffer) {
         m_imageBuffer->context()->setRegionTrackingMode(GraphicsContext::RegionTrackingDisabled);
         m_imageBuffer->context()->resetCanvas(m_fallbackSurface->canvas());
+        m_imageBuffer->context()->setAccelerated(m_fallbackSurface->isAccelerated());
     }
 }
 
 SkCanvas* RecordingImageBufferSurface::canvas() const
 {
     if (m_fallbackSurface)
         return m_fallbackSurface->canvas();
 
     ASSERT(m_currentFrame->getRecordingCanvas());
     return m_currentFrame->getRecordingCanvas();
@@ skipping 170 matching lines @@
 
 void RecordingImageBufferSurface::setIsHidden(bool hidden)
 {
     if (m_fallbackSurface)
         m_fallbackSurface->setIsHidden(hidden);
     else
         ImageBufferSurface::setIsHidden(hidden);
 }
 
 } // namespace blink