Switch ChromeOS Chromium login to use IJG libjpeg

ui/gfx/chromeos/codec/jpeg_codec_robust_slow.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_GFX_CODEC_JPEG_CODEC_H_
-#define UI_GFX_CODEC_JPEG_CODEC_H_
+#ifndef UI_GFX_CHROMEOS_CODEC_JPEG_CODEC_ROBUST_SLOW_H_
+#define UI_GFX_CHROMEOS_CODEC_JPEG_CODEC_ROBUST_SLOW_H_
 
 #include <stddef.h>
 #include <vector>
 
 #include "ui/gfx/gfx_export.h"
 
 class SkBitmap;
 
 namespace gfx {
 
 // Interface for encoding/decoding JPEG data. This is a wrapper around libjpeg,
-// which has an inconvenient interface for callers. This is only used for UI
-// elements, WebKit has its own more complicated JPEG decoder which handles,
-// among other things, partially downloaded data.
-class GFX_EXPORT JPEGCodec {
+// which has an inconvenient interface for callers. This is only used for
+// servicing ChromeUtilityMsg_RobustJPEGDecodeImage and is currently unique
+// to Chrome OS.
+class GFX_EXPORT JPEGCodecRobustSlow {
  public:
   enum ColorFormat {
     // 3 bytes per pixel (packed), in RGB order regardless of endianness.
     // This is the native JPEG format.
     FORMAT_RGB,
 
     // 4 bytes per pixel, in RGBA order in mem regardless of endianness.
     FORMAT_RGBA,
 
     // 4 bytes per pixel, in BGRA order in mem regardless of endianness.
     // This is the default Windows DIB order.
     FORMAT_BGRA,
 
     // 4 bytes per pixel, it can be either RGBA or BGRA. It depends on the bit
     // order in kARGB_8888_Config skia bitmap.
     FORMAT_SkBitmap
   };
 
-  enum LibraryVariant {
-    SYSTEM_LIBJPEG = 0,
-    LIBJPEG_TURBO,
-    IJG_LIBJPEG,
-  };
-
-  // This method helps identify at run time which library chromium is using.
-  static LibraryVariant JpegLibraryVariant();
-
-  // Encodes the given raw 'input' data, with each pixel being represented as
-  // given in 'format'. The encoded JPEG data will be written into the supplied
-  // vector and true will be returned on success. On failure (false), the
-  // contents of the output buffer are undefined.
-  //
-  // w, h: dimensions of the image
-  // row_byte_width: the width in bytes of each row. This may be greater than
-  //   w * bytes_per_pixel if there is extra padding at the end of each row
-  //   (often, each row is padded to the next machine word).
-  // quality: an integer in the range 0-100, where 100 is the highest quality.
-  static bool Encode(const unsigned char* input, ColorFormat format,
-                     int w, int h, int row_byte_width,
-                     int quality, std::vector<unsigned char>* output);
-
   // Decodes the JPEG data contained in input of length input_size. The
   // decoded data will be placed in *output with the dimensions in *w and *h
   // on success (returns true). This data will be written in the'format'
   // format. On failure, the values of these output variables is undefined.
   static bool Decode(const unsigned char* input, size_t input_size,
                      ColorFormat format, std::vector<unsigned char>* output,
                      int* w, int* h);
 
   // Decodes the JPEG data contained in input of length input_size. If
   // successful, a SkBitmap is created and returned. It is up to the caller
   // to delete the returned bitmap.
   static SkBitmap* Decode(const unsigned char* input, size_t input_size);
 };
 
 }  // namespace gfx
 
-#endif  // UI_GFX_CODEC_JPEG_CODEC_H_
+#endif  // UI_GFX_CHROMEOS_CODEC_JPEG_CODEC_ROBUST_SLOW_H_