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

core/include/fpdfapi/cpdf_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_INCLUDE_FPDFAPI_CPDF_PARSER_H_
 #define CORE_INCLUDE_FPDFAPI_CPDF_PARSER_H_
 
 #include <map>
 #include <memory>
 #include <set>
 
 #include "core/include/fxcrt/fx_basic.h"
 
 class CPDF_Array;
-class CPDF_CryptoHandler;
 class CPDF_Dictionary;
 class CPDF_Document;
 class CPDF_IndirectObjectHolder;
 class CPDF_Object;
 class CPDF_StreamAcc;
 class CPDF_SyntaxParser;
 class IFX_FileRead;
+class IPDF_CryptoHandler;
 class IPDF_SecurityHandler;
 
 class CPDF_Parser {
  public:
   enum Error {
     SUCCESS = 0,
     FILE_ERROR,
     FORMAT_ERROR,
     PASSWORD_ERROR,
     HANDLER_ERROR
@@ skipping 21 matching lines @@
                                    FX_DWORD objnum);
 
   FX_DWORD GetLastObjNum() const;
   bool IsValidObjectNumber(FX_DWORD objnum) const;
   FX_FILESIZE GetObjectPositionOrZero(FX_DWORD objnum) const;
   uint8_t GetObjectType(FX_DWORD objnum) const;
   uint16_t GetObjectGenNum(FX_DWORD objnum) const;
   bool IsVersionUpdated() const { return m_bVersionUpdated; }
   bool IsObjectFreeOrNull(FX_DWORD objnum) const;
   FX_BOOL IsFormStream(FX_DWORD objnum, FX_BOOL& bForm);
-  CPDF_CryptoHandler* GetCryptoHandler();
+  IPDF_CryptoHandler* GetCryptoHandler();
   IFX_FileRead* GetFileAccess() const;
 
   FX_FILESIZE GetObjectOffset(FX_DWORD objnum) const;
   FX_FILESIZE GetObjectSize(FX_DWORD objnum) const;
 
   void GetIndirectBinary(FX_DWORD objnum, uint8_t*& pBuffer, FX_DWORD& size);
   int GetFileVersion() const { return m_FileVersion; }
   FX_BOOL IsXRefStream() const { return m_bXRefStream; }
 
   CPDF_Object* ParseIndirectObjectAt(CPDF_IndirectObjectHolder* pObjList,
@@ skipping 87 matching lines @@
     kPostObjNum,
     kGenNum,
     kPostGenNum,
     kTrailer,
     kBeginObj,
     kEndObj
   };
 };
 
 #endif  // CORE_INCLUDE_FPDFAPI_CPDF_PARSER_H_