Cleanup some dead code in blink::ImageBuffer and friends

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

 /*
  * Copyright (c) 2008, Google Inc. All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 86 matching lines @@
 void ImageBuffer::disableDeferral() const
 {
     return m_surface->disableDeferral();
 }
 
 bool ImageBuffer::writePixels(const SkImageInfo& info, const void* pixels, size_t rowBytes, int x, int y)
 {
     return m_surface->writePixels(info, pixels, rowBytes, x, y);
 }
 
-const SkBitmap& ImageBuffer::deprecatedBitmapForOverwrite() const
-{
-    return m_surface->deprecatedBitmapForOverwrite();
-}
-
 bool ImageBuffer::isSurfaceValid() const
 {
     return m_surface->isValid();
 }
 
 bool ImageBuffer::isDirty()
 {
     return m_client ? m_client->isDirty() : false;
 }
 
@@ skipping 256 matching lines @@
     ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
 
     Vector<unsigned char> result;
     if (!encodeImage(mimeType, quality, &result))
         return "data:,";
 
     return "data:" + mimeType + ";base64," + base64Encode(result);
 }
 
 } // namespace blink