Remove unused PS generation code.

core/fxcodec/codec/ccodec_jpegmodule.h

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef CORE_FXCODEC_CODEC_CCODEC_JPEGMODULE_H_
 #define CORE_FXCODEC_CODEC_CCODEC_JPEGMODULE_H_
 
 #include "core/fxcrt/include/fx_system.h"
 
 class CCodec_ScanlineDecoder;
 class CFX_DIBSource;
 struct FXJPEG_Context;
 
 #ifdef PDF_ENABLE_XFA
 class CFX_DIBAttribute;
 #endif  // PDF_ENABLE_XFA
 
 class CCodec_JpegModule {
  public:
   CCodec_JpegModule() {}
+
   CCodec_ScanlineDecoder* CreateDecoder(const uint8_t* src_buf,
                                         uint32_t src_size,
                                         int width,
                                         int height,
                                         int nComps,
                                         FX_BOOL ColorTransform);
-  FX_BOOL LoadInfo(const uint8_t* src_buf,
-                   uint32_t src_size,
-                   int& width,
-                   int& height,
-                   int& num_components,
-                   int& bits_per_components,
-                   FX_BOOL& color_transform,
-                   uint8_t** icc_buf_ptr = nullptr,
-                   uint32_t* icc_length = nullptr);
-  FX_BOOL Encode(const CFX_DIBSource* pSource,
-                 uint8_t*& dest_buf,
-                 FX_STRSIZE& dest_size,
-                 int quality = 75,
-                 const uint8_t* icc_buf = nullptr,
-                 uint32_t icc_length = 0);
+  bool LoadInfo(const uint8_t* src_buf,
+                uint32_t src_size,
+                int* width,
+                int* height,
+                int* num_components,
+                int* bits_per_components,
+                bool* color_transform);
   FXJPEG_Context* Start();
   void Finish(FXJPEG_Context* pContext);
   void Input(FXJPEG_Context* pContext,
              const uint8_t* src_buf,
              uint32_t src_size);
 
 #ifndef PDF_ENABLE_XFA
   int ReadHeader(FXJPEG_Context* pContext,
                  int* width,
                  int* height,
                  int* nComps);
 #else   // PDF_ENABLE_XFA
   int ReadHeader(FXJPEG_Context* pContext,
                  int* width,
                  int* height,
                  int* nComps,
                  CFX_DIBAttribute* pAttribute);
 #endif  // PDF_ENABLE_XFA
 
   int StartScanline(FXJPEG_Context* pContext, int down_scale);
   FX_BOOL ReadScanline(FXJPEG_Context* pContext, uint8_t* dest_buf);
   uint32_t GetAvailInput(FXJPEG_Context* pContext, uint8_t** avail_buf_ptr);
 };
 
 #endif  // CORE_FXCODEC_CODEC_CCODEC_JPEGMODULE_H_