Refcount all the IFX_ stream classes all the time.

core/fxcodec/codec/ccodec_tiffmodule.h

 // 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
 
 #ifndef CORE_FXCODEC_CODEC_CCODEC_TIFFMODULE_H_
 #define CORE_FXCODEC_CODEC_CCODEC_TIFFMODULE_H_
 
+#include "core/fxcrt/cfx_retain_ptr.h"
 #include "core/fxcrt/fx_system.h"
 
 class CCodec_TiffContext;
 class CFX_DIBAttribute;
 class CFX_DIBitmap;
 class IFX_SeekableReadStream;
 
 class CCodec_TiffModule {
  public:
   ~CCodec_TiffModule() {}
 
-  CCodec_TiffContext* CreateDecoder(IFX_SeekableReadStream* file_ptr);
+  CCodec_TiffContext* CreateDecoder(
+      const CFX_RetainPtr<IFX_SeekableReadStream>& file_ptr);
 
   bool LoadFrameInfo(CCodec_TiffContext* ctx,
                      int32_t frame,
                      int32_t* width,
                      int32_t* height,
                      int32_t* comps,
                      int32_t* bpc,
                      CFX_DIBAttribute* pAttribute);
   bool Decode(CCodec_TiffContext* ctx, class CFX_DIBitmap* pDIBitmap);
   void DestroyDecoder(CCodec_TiffContext* ctx);
 };
 
 #endif  // CORE_FXCODEC_CODEC_CCODEC_TIFFMODULE_H_