Remove ImageSource::bytesDecodedToDetermineProperties() and fallout

Source/core/platform/graphics/GeneratedImage.h

 /*
  * Copyright (C) 2008 Apple Computer, 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 28 matching lines @@
     virtual void setContainerSize(const IntSize& size) OVERRIDE { m_size = size; }
     virtual bool usesContainerSize() const OVERRIDE { return true; }
     virtual bool hasRelativeWidth() const OVERRIDE { return true; }
     virtual bool hasRelativeHeight() const OVERRIDE { return true; }
     virtual void computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) OVERRIDE;
 
     virtual IntSize size() const OVERRIDE { return m_size; }
 
     // Assume that generated content has no decoded data we need to worry about
     virtual void destroyDecodedData(bool) OVERRIDE { }
-    virtual unsigned decodedSize() const OVERRIDE { return 0; }
 
 protected:
     virtual void drawPattern(GraphicsContext*, const FloatRect&,
         const FloatSize&, const FloatPoint&, CompositeOperator,
         const FloatRect&, BlendMode, const IntSize& repeatSpacing) OVERRIDE = 0;
 
     // FIXME: Implement this to be less conservative.
     virtual bool currentFrameKnownToBeOpaque() OVERRIDE { return false; }
 
     GeneratedImage() { }
 
     IntSize m_size;
 };
 
 }
 
 #endif