Removing GraphicsContext from ImageBuffer

Source/platform/graphics/GraphicsContext.h

 /*
  * Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008-2009 Torch Mobile, Inc.
  * 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 134 matching lines @@
     // and fonts are rendered.
     void setDeviceScaleFactor(float factor) { m_deviceScaleFactor = factor; }
     float deviceScaleFactor() const { return m_deviceScaleFactor; }
 
     // Returns if the context is a printing context instead of a display
     // context. Bitmap shouldn't be resampled when printing to keep the best
     // possible quality.
     bool printing() const { return m_printing; }
     void setPrinting(bool printing) { m_printing = printing; }
 
-    bool isAccelerated() const { return m_accelerated; }
-    void setAccelerated(bool accelerated) { m_accelerated = accelerated; }
-
     SkColorFilter* colorFilter() const;
     void setColorFilter(ColorFilter);
     // ---------- End state management methods -----------------
 
     // These draw methods will do both stroking and filling.
     // FIXME: ...except drawRect(), which fills properly but always strokes
     // using a 1-pixel stroke inset from the rect borders (of the correct
     // stroke color).
     void drawRect(const IntRect&);
     void drawLine(const IntPoint&, const IntPoint&);
@@ skipping 228 matching lines @@
 #if ENABLE(ASSERT)
     unsigned m_layerCount;
     bool m_disableDestructionChecks;
     bool m_inDrawingRecorder;
 #endif
 
     const DisabledMode m_disabledState;
 
     float m_deviceScaleFactor;
 
-    unsigned m_accelerated : 1;
     unsigned m_printing : 1;
 };
 
 } // namespace blink
 
 #endif // GraphicsContext_h