Remove ImageSource::bytesDecodedToDetermineProperties() and fallout

Source/core/platform/graphics/ImageSource.cpp

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp.toker@collabora.co.uk>
  * Copyright (C) 2008, 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 83 matching lines @@
         return IntSize(size.height(), size.width());
 
     return size;
 }
 
 bool ImageSource::getHotSpot(IntPoint& hotSpot) const
 {
     return m_decoder ? m_decoder->hotSpot(hotSpot) : false;
 }
 
-size_t ImageSource::bytesDecodedToDetermineProperties() const
-{
-    return 0;
-}
-
 int ImageSource::repetitionCount()
 {
     return m_decoder ? m_decoder->repetitionCount() : cAnimationNone;
 }
 
 size_t ImageSource::frameCount() const
 {
     return m_decoder ? m_decoder->frameCount() : 0;
 }
 
@@ skipping 47 matching lines @@
 }
 
 unsigned ImageSource::frameBytesAtIndex(size_t index) const
 {
     if (!m_decoder)
         return 0;
     return m_decoder->frameBytesAtIndex(index);
 }
 
 }