Remove image decoder down sampling

Source/core/platform/graphics/Image.h

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006 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
@@ skipping 97 matching lines @@
     ImageObserver* imageObserver() const { return m_imageObserver; }
     void setImageObserver(ImageObserver* observer) { m_imageObserver = observer; }
 
     enum TileRule { StretchTile, RoundTile, SpaceTile, RepeatTile };
 
     virtual PassNativeImagePtr nativeImageForCurrentFrame() { return 0; }
 
     virtual void drawPattern(GraphicsContext*, const FloatRect& srcRect, const AffineTransform& patternTransform,
         const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator, const FloatRect& destRect, BlendMode = BlendModeNormal);
 
-#if ENABLE(IMAGE_DECODER_DOWN_SAMPLING)
-    FloatRect adjustSourceRectForDownSampling(const FloatRect& srcRect, const IntSize& scaledSize) const;
-#endif
-
 #if !ASSERT_DISABLED
     virtual bool notSolidColor() { return true; }
 #endif
 
     virtual void reportMemoryUsage(MemoryObjectInfo*) const;
 
 protected:
     Image(ImageObserver* = 0);
 
     static void fillWithSolidColor(GraphicsContext*, const FloatRect& dstRect, const Color&, ColorSpace styleColorSpace, CompositeOperator);
@@ skipping 10 matching lines @@
     virtual Color solidColor() const { return Color(); }
     
 private:
     RefPtr<SharedBuffer> m_encodedImageData;
     ImageObserver* m_imageObserver;
 };
 
 }
 
 #endif