Refcount all the IFX_ stream classes all the time.

core/fpdfapi/parser/cpdf_stream.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_stream.h"
 
 #include <utility>
 
@@ skipping 44 matching lines @@
   m_bMemoryBased = true;
   m_pFile = nullptr;
   m_pDataBuf.reset(FX_Alloc(uint8_t, size));
   if (pData)
     FXSYS_memcpy(m_pDataBuf.get(), pData, size);
   m_dwSize = size;
   if (m_pDict)
     m_pDict->SetNewFor<CPDF_Number>("Length", static_cast<int>(m_dwSize));
 }
 
-void CPDF_Stream::InitStreamFromFile(IFX_SeekableReadStream* pFile,
-                                     std::unique_ptr<CPDF_Dictionary> pDict) {
+void CPDF_Stream::InitStreamFromFile(
+    const CFX_RetainPtr<IFX_SeekableReadStream>& pFile,
+    std::unique_ptr<CPDF_Dictionary> pDict) {
   m_pDict = std::move(pDict);
   m_bMemoryBased = false;
   m_pDataBuf.reset();
   m_pFile = pFile;
   m_dwSize = pdfium::base::checked_cast<uint32_t>(pFile->GetSize());
   if (m_pDict)
     m_pDict->SetNewFor<CPDF_Number>("Length", static_cast<int>(m_dwSize));
 }
 
 std::unique_ptr<CPDF_Object> CPDF_Stream::Clone() const {
@@ skipping 45 matching lines @@
 
 bool CPDF_Stream::HasFilter() const {
   return m_pDict && m_pDict->KeyExist("Filter");
 }
 
 CFX_WideString CPDF_Stream::GetUnicodeText() const {
   CPDF_StreamAcc stream;
   stream.LoadAllData(this, false);
   return PDF_DecodeText(stream.GetData(), stream.GetSize());
 }