Refcount all the IFX_ stream classes all the time.

core/fpdfapi/edit/cpdf_creator.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_FPDFAPI_EDIT_CPDF_CREATOR_H_
 #define CORE_FPDFAPI_EDIT_CPDF_CREATOR_H_
 
 #include <memory>
 
+#include "core/fxcrt/cfx_retain_ptr.h"
 #include "core/fxcrt/fx_basic.h"
 
 class CPDF_Array;
 class CPDF_CryptoHandler;
 class CPDF_Dictionary;
 class CPDF_Document;
 class CPDF_Object;
 class CPDF_Parser;
 class CPDF_XRefStream;
 
 #define FPDFCREATE_INCREMENTAL 1
 #define FPDFCREATE_NO_ORIGINAL 2
 #define FPDFCREATE_PROGRESSIVE 4
 #define FPDFCREATE_OBJECTSTREAM 8
 
 CFX_ByteTextBuf& operator<<(CFX_ByteTextBuf& buf, const CPDF_Object* pObj);
 
 class CPDF_Creator {
  public:
   explicit CPDF_Creator(CPDF_Document* pDoc);
   ~CPDF_Creator();
 
   void RemoveSecurity();
-  bool Create(IFX_WriteStream* pFile, uint32_t flags = 0);
+  bool Create(const CFX_RetainPtr<IFX_WriteStream>& pFile, uint32_t flags = 0);
   int32_t Continue(IFX_Pause* pPause = nullptr);
   bool SetFileVersion(int32_t fileVersion = 17);
 
  private:
   friend class CPDF_ObjectStream;
   friend class CPDF_XRefStream;
 
   bool Create(uint32_t flags);
   void ResetStandardSecurity();
   void Clear();
@@ skipping 46 matching lines @@
   uint32_t m_dwFlags;
   FX_POSITION m_Pos;
   FX_FILESIZE m_XrefStart;
   CFX_FileSizeListArray m_ObjectOffset;
   CFX_ArrayTemplate<uint32_t> m_NewObjNumArray;
   std::unique_ptr<CPDF_Array> m_pIDArray;
   int32_t m_FileVersion;
 };
 
 #endif  // CORE_FPDFAPI_EDIT_CPDF_CREATOR_H_