Refcount all the IFX_ stream classes all the time.

core/fpdfapi/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_FPDFAPI_PARSER_CPDF_SYNTAX_PARSER_H_
 #define CORE_FPDFAPI_PARSER_CPDF_SYNTAX_PARSER_H_
 
 #include <memory>
 
 #include "core/fxcrt/cfx_string_pool_template.h"
 #include "core/fxcrt/cfx_weak_ptr.h"
 #include "core/fxcrt/fx_basic.h"
 
 class CPDF_CryptoHandler;
 class CPDF_Dictionary;
 class CPDF_IndirectObjectHolder;
 class CPDF_Object;
 class CPDF_Stream;
 class IFX_SeekableReadStream;
 
 class CPDF_SyntaxParser {
  public:
   CPDF_SyntaxParser();
   explicit CPDF_SyntaxParser(const CFX_WeakPtr<CFX_ByteStringPool>& pPool);
   ~CPDF_SyntaxParser();
 
-  void InitParser(IFX_SeekableReadStream* pFileAccess, uint32_t HeaderOffset);
+  void InitParser(const CFX_RetainPtr<IFX_SeekableReadStream>& pFileAccess,
+                  uint32_t HeaderOffset);
+
   FX_FILESIZE SavePos() const { return m_Pos; }
   void RestorePos(FX_FILESIZE pos) { m_Pos = pos; }
 
   std::unique_ptr<CPDF_Object> GetObject(CPDF_IndirectObjectHolder* pObjList,
                                          uint32_t objnum,
                                          uint32_t gennum,
                                          bool bDecrypt);
 
   std::unique_ptr<CPDF_Object> GetObjectForStrict(
       CPDF_IndirectObjectHolder* pObjList,
@@ skipping 40 matching lines @@
       uint32_t objnum,
       uint32_t gennum);
 
   inline bool CheckPosition(FX_FILESIZE pos) {
     return m_BufOffset >= pos ||
            static_cast<FX_FILESIZE>(m_BufOffset + m_BufSize) <= pos;
   }
 
   FX_FILESIZE m_Pos;
   uint32_t m_MetadataObjnum;
-  IFX_SeekableReadStream* m_pFileAccess;
+  CFX_RetainPtr<IFX_SeekableReadStream> m_pFileAccess;
   FX_FILESIZE m_HeaderOffset;
   FX_FILESIZE m_FileLen;
   uint8_t* m_pFileBuf;
   uint32_t m_BufSize;
   FX_FILESIZE m_BufOffset;
   std::unique_ptr<CPDF_CryptoHandler> m_pCryptoHandler;
   uint8_t m_WordBuffer[257];
   uint32_t m_WordSize;
   CFX_WeakPtr<CFX_ByteStringPool> m_pPool;
 };
 
 #endif  // CORE_FPDFAPI_PARSER_CPDF_SYNTAX_PARSER_H_