Split off IPDF_CryptoHandler into its own .cpp/.h files

core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.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_SRC_FPDFAPI_FPDF_PARSER_CPDF_SYNTAX_PARSER_H_
 #define CORE_SRC_FPDFAPI_FPDF_PARSER_CPDF_SYNTAX_PARSER_H_
 
 #include <memory>
 
 #include "core/include/fxcrt/fx_basic.h"
 
-class CPDF_CryptoHandler;
+class IPDF_CryptoHandler;
 class CPDF_IndirectObjectHolder;
 class CPDF_Object;
 class CPDF_Dictionary;
 class CPDF_Stream;
 class IFX_FileRead;
 
 class CPDF_SyntaxParser {
  public:
   CPDF_SyntaxParser();
   ~CPDF_SyntaxParser();
@@ skipping 17 matching lines @@
 
   FX_BOOL SearchWord(const CFX_ByteStringC& word,
                      FX_BOOL bWholeWord,
                      FX_BOOL bForward,
                      FX_FILESIZE limit);
   int SearchMultiWord(const CFX_ByteStringC& words,
                       FX_BOOL bWholeWord,
                       FX_FILESIZE limit);
   FX_FILESIZE FindTag(const CFX_ByteStringC& tag, FX_FILESIZE limit);
 
-  void SetEncrypt(std::unique_ptr<CPDF_CryptoHandler> pCryptoHandler);
+  void SetEncrypt(std::unique_ptr<IPDF_CryptoHandler> pCryptoHandler);
 
   FX_BOOL ReadBlock(uint8_t* pBuf, FX_DWORD size);
   FX_BOOL GetCharAt(FX_FILESIZE pos, uint8_t& ch);
   CFX_ByteString GetNextWord(bool* bIsNumber);
 
  private:
   friend class CPDF_Parser;
   friend class CPDF_DataAvail;
   friend class fpdf_parser_parser_ReadHexString_Test;
 
@@ skipping 18 matching lines @@
                           FX_DWORD gennum);
 
   FX_FILESIZE m_Pos;
   int m_MetadataObjnum;
   IFX_FileRead* m_pFileAccess;
   FX_DWORD m_HeaderOffset;
   FX_FILESIZE m_FileLen;
   uint8_t* m_pFileBuf;
   FX_DWORD m_BufSize;
   FX_FILESIZE m_BufOffset;
-  std::unique_ptr<CPDF_CryptoHandler> m_pCryptoHandler;
+  std::unique_ptr<IPDF_CryptoHandler> m_pCryptoHandler;
   uint8_t m_WordBuffer[257];
   FX_DWORD m_WordSize;
 };
 
 #endif  // CORE_SRC_FPDFAPI_FPDF_PARSER_CPDF_SYNTAX_PARSER_H_