Refcount all the IFX_ stream classes all the time.

core/fpdfapi/parser/cpdf_syntax_parser.cpp

 // 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
 
 #include "core/fpdfapi/parser/cpdf_syntax_parser.h"
 
 #include <algorithm>
 #include <utility>
@@ skipping 738 matching lines @@
   int numMarkers = ReadEOLMarkers(m_Pos);
   if (m_WordSize == static_cast<unsigned int>(kEndObjStr.GetLength()) &&
       numMarkers != 0 &&
       FXSYS_memcmp(m_WordBuffer, kEndObjStr.raw_str(),
                    kEndObjStr.GetLength()) == 0) {
     m_Pos = streamStartPos;
   }
   return pStream;
 }
 
-void CPDF_SyntaxParser::InitParser(IFX_SeekableReadStream* pFileAccess,
-                                   uint32_t HeaderOffset) {
+void CPDF_SyntaxParser::InitParser(
+    const CFX_RetainPtr<IFX_SeekableReadStream>& pFileAccess,
+    uint32_t HeaderOffset) {
   FX_Free(m_pFileBuf);
 
   m_pFileBuf = FX_Alloc(uint8_t, m_BufSize);
   m_HeaderOffset = HeaderOffset;
   m_FileLen = pFileAccess->GetSize();
   m_Pos = 0;
   m_pFileAccess = pFileAccess;
   m_BufOffset = 0;
   pFileAccess->ReadBlock(m_pFileBuf, 0,
                          std::min(m_BufSize, static_cast<uint32_t>(m_FileLen)));
@@ skipping 130 matching lines @@
     if (limit && m_Pos == limit)
       return -1;
   }
   return -1;
 }
 
 void CPDF_SyntaxParser::SetEncrypt(
     std::unique_ptr<CPDF_CryptoHandler> pCryptoHandler) {
   m_pCryptoHandler = std::move(pCryptoHandler);
 }