Revert postscript code removal.

core/fxcodec/codec/ccodec_basicmodule.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_BASICMODULE_H_
 #define CORE_FXCODEC_CODEC_CCODEC_BASICMODULE_H_
 
 #include <memory>
 
 #include "core/fxcrt/fx_system.h"
 
 class CCodec_ScanlineDecoder;
 
 class CCodec_BasicModule {
  public:
   std::unique_ptr<CCodec_ScanlineDecoder> CreateRunLengthDecoder(
       const uint8_t* src_buf,
       uint32_t src_size,
       int width,
       int height,
       int nComps,
       int bpc);
+  bool RunLengthEncode(const uint8_t* src_buf,
+                       uint32_t src_size,
+                       uint8_t** dest_buf,
+                       uint32_t* dest_size);
+  bool A85Encode(const uint8_t* src_buf,
+                 uint32_t src_size,
+                 uint8_t** dest_buf,
+                 uint32_t* dest_size);
 };
 
 #endif  // CORE_FXCODEC_CODEC_CCODEC_BASICMODULE_H_