Refcount all the IFX_ stream classes all the time.

core/fxcrt/xml_int.h

 // Copyright 2014 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_FXCRT_XML_INT_H_
 #define CORE_FXCRT_XML_INT_H_
 
 #include <algorithm>
 
 #include "core/fxcrt/fx_stream.h"
 
 class CFX_UTF8Decoder;
 class CXML_Element;
 
 class CXML_Parser {
  public:
   CXML_Parser();
   ~CXML_Parser();
 
   bool Init(uint8_t* pBuffer, size_t size);
-  bool Init(IFX_SeekableReadStream* pFileRead);
-  bool Init(IFX_BufferedReadStream* pBuffer);
-  bool Init(bool bOwndedStream);
+  bool Init(const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead);
+  bool Init(const CFX_RetainPtr<IFX_BufferedReadStream>& pBuffer);
+  bool Init();
   bool ReadNextBlock();
   bool IsEOF();
   bool HaveAvailData();
   void SkipWhiteSpaces();
   void GetName(CFX_ByteString& space, CFX_ByteString& name);
   void GetAttrValue(CFX_WideString& value);
   uint32_t GetCharRef();
   void GetTagName(CFX_ByteString& space,
                   CFX_ByteString& name,
                   bool& bEndTag,
                   bool bStartTag = false);
   void SkipLiterals(const CFX_ByteStringC& str);
   CXML_Element* ParseElement(CXML_Element* pParent, bool bStartTag = false);
   void InsertContentSegment(bool bCDATA,
                             const CFX_WideStringC& content,
                             CXML_Element* pElement);
   void InsertCDATASegment(CFX_UTF8Decoder& decoder, CXML_Element* pElement);
 
-  IFX_BufferedReadStream* m_pDataAcc;
-  bool m_bOwnedStream;
+  CFX_RetainPtr<IFX_BufferedReadStream> m_pDataAcc;
   FX_FILESIZE m_nOffset;
   bool m_bSaveSpaceChars;
   const uint8_t* m_pBuffer;
   size_t m_dwBufferSize;
   FX_FILESIZE m_nBufferOffset;
   size_t m_dwIndex;
 };
 
 void FX_XML_SplitQualifiedName(const CFX_ByteStringC& bsFullName,
                                CFX_ByteStringC& bsSpace,
                                CFX_ByteStringC& bsName);
 
 #endif  // CORE_FXCRT_XML_INT_H_