Use smart pointers for class owned member variables

core/fpdfapi/fpdf_parser/include/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_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_PARSER_H_
 #define CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_PARSER_H_
 
 #include <map>
@@ skipping 26 matching lines @@
   CPDF_Parser();
   ~CPDF_Parser();
 
   Error StartParse(IFX_FileRead* pFile);
   uint32_t GetPermissions() const;
 
   void SetPassword(const FX_CHAR* password) { m_Password = password; }
   CFX_ByteString GetPassword() { return m_Password; }
   CPDF_Dictionary* GetTrailer() const { return m_pTrailer; }
   FX_FILESIZE GetLastXRefOffset() const { return m_LastXRefOffset; }
-  CPDF_Document* GetDocument() const { return m_pDocument; }
+  CPDF_Document* GetDocument() const { return m_pDocument.get(); }
 
   uint32_t GetRootObjNum();
   uint32_t GetInfoObjNum();
   CPDF_Array* GetIDArray();
 
   CPDF_Dictionary* GetEncryptDict() const { return m_pEncryptDict; }
 
   CPDF_Object* ParseIndirectObject(CPDF_IndirectObjectHolder* pObjList,
                                    uint32_t objnum);
 
@@ skipping 53 matching lines @@
   FX_BOOL LoadLinearizedAllCrossRefV5(FX_FILESIZE pos);
   Error LoadLinearizedMainXRefTable();
   CPDF_StreamAcc* GetObjectStream(uint32_t number);
   FX_BOOL IsLinearizedFile(IFX_FileRead* pFileAccess, uint32_t offset);
   void SetEncryptDictionary(CPDF_Dictionary* pDict);
   void ShrinkObjectMap(uint32_t size);
   // A simple check whether the cross reference table matches with
   // the objects.
   bool VerifyCrossRefV4();
 
-  CPDF_Document* m_pDocument;
+  std::unique_ptr<CPDF_Document> m_pDocument;
   std::unique_ptr<CPDF_SyntaxParser> m_pSyntax;
   bool m_bOwnFileRead;
   int m_FileVersion;
   CPDF_Dictionary* m_pTrailer;
   CPDF_Dictionary* m_pEncryptDict;
   FX_FILESIZE m_LastXRefOffset;
   FX_BOOL m_bXRefStream;
   std::unique_ptr<CPDF_SecurityHandler> m_pSecurityHandler;
   CFX_ByteString m_bsRecipient;
   CFX_ByteString m_FilePath;
@@ skipping 35 matching lines @@
     kPostObjNum,
     kGenNum,
     kPostGenNum,
     kTrailer,
     kBeginObj,
     kEndObj
   };
 };
 
 #endif  // CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_PARSER_H_