Remove image decoder down sampling

Source/core/platform/image-decoders/jpeg/JPEGImageDecoder.h

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2008-2009 Torch Mobile, Inc.
  *
  * 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 30 matching lines @@
 
     // This class decodes the JPEG image format.
     class JPEGImageDecoder : public ImageDecoder {
     public:
         JPEGImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption);
         virtual ~JPEGImageDecoder();
 
         // ImageDecoder
         virtual String filenameExtension() const { return "jpg"; }
         virtual bool isSizeAvailable();
-        virtual bool setSize(unsigned width, unsigned height);
         virtual ImageFrame* frameBufferAtIndex(size_t index);
         // CAUTION: setFailed() deletes |m_reader|.  Be careful to avoid
         // accessing deleted memory, especially when calling this from inside
         // JPEGImageReader!
         virtual bool setFailed();
 
-        bool willDownSample()
-        {
-            ASSERT(ImageDecoder::isSizeAvailable());
-            return m_scaled;
-        }
-
         bool outputScanlines();
         void jpegComplete();
 
         void setOrientation(ImageOrientation orientation) { m_orientation = orientation; }
 
     private:
         // Decodes the image.  If |onlySize| is true, stops decoding after
         // calculating the image size.  If decoding fails but there is no more
         // data coming, sets the "decode failure" flag.
         void decode(bool onlySize);
 
         template <J_COLOR_SPACE colorSpace>
         bool outputScanlines(ImageFrame& buffer);
 
-        template <J_COLOR_SPACE colorSpace, bool isScaled>
-        bool outputScanlines(ImageFrame& buffer);
-
         OwnPtr<JPEGImageReader> m_reader;
     };
 
 } // namespace WebCore
 
 #endif