Refcount all the IFX_ stream classes all the time.

xfa/fxfa/parser/cxfa_simple_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 "xfa/fxfa/parser/cxfa_simple_parser.h"
 
 #include "core/fxcrt/fx_ext.h"
 #include "xfa/fgas/crt/fgas_codepage.h"
@@ skipping 259 matching lines @@
       m_pRootNode(nullptr),
       m_ePacketID(XFA_XDPPACKET_UNKNOWN),
       m_bDocumentParser(bDocumentParser) {}
 
 CXFA_SimpleParser::~CXFA_SimpleParser() {}
 
 void CXFA_SimpleParser::SetFactory(CXFA_Document* pFactory) {
   m_pFactory = pFactory;
 }
 
-int32_t CXFA_SimpleParser::StartParse(IFX_SeekableReadStream* pStream,
-                                      XFA_XDPPACKET ePacketID) {
+int32_t CXFA_SimpleParser::StartParse(
+    const CFX_RetainPtr<IFX_SeekableReadStream>& pStream,
+    XFA_XDPPACKET ePacketID) {
   CloseParser();
   m_pFileRead = pStream;
   m_pStream.reset(IFGAS_Stream::CreateStream(
       pStream, FX_STREAMACCESS_Read | FX_STREAMACCESS_Text));
   if (!m_pStream)
     return XFA_PARSESTATUS_StreamErr;
 
   uint16_t wCodePage = m_pStream->GetCodePage();
   if (wCodePage != FX_CODEPAGE_UTF16LE && wCodePage != FX_CODEPAGE_UTF16BE &&
       wCodePage != FX_CODEPAGE_UTF8) {
@@ skipping 1008 matching lines @@
         pXFANode->GetDocument()->SetFlag(XFA_DOCFLAG_StrictScoping, true);
       }
     }
   }
 }
 
 void CXFA_SimpleParser::CloseParser() {
   m_pXMLDoc.reset();
   m_pStream.reset();
 }