Cleanup some dead code in blink::ImageBuffer and friends

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 227 matching lines @@
         if (m_previousFrameHasExpensiveOp)
             return true;
 
         if (m_previousFramePixelCount >= (size().width() * size().height() * ExpensiveCanvasHeuristicParameters::ExpensiveOverdrawThreshold))
             return true;
     }
 
     return false;
 }
 
-const SkBitmap& RecordingImageBufferSurface::deprecatedBitmapForOverwrite()
-{
-    if (!m_fallbackSurface) {
-        willOverwriteCanvas();
-        fallBackToRasterCanvas();
-    }
-    return m_fallbackSurface->deprecatedBitmapForOverwrite();
-}
-
 // Fallback passthroughs
 
 bool RecordingImageBufferSurface::restore()
 {
     if (m_fallbackSurface)
         return m_fallbackSurface->restore();
     return ImageBufferSurface::restore();
 }
 
 WebLayer* RecordingImageBufferSurface::layer() const
@@ skipping 12 matching lines @@
 
 void RecordingImageBufferSurface::setIsHidden(bool hidden)
 {
     if (m_fallbackSurface)
         m_fallbackSurface->setIsHidden(hidden);
     else
         ImageBufferSurface::setIsHidden(hidden);
 }
 
 } // namespace blink