Refcount all the IFX_ stream classes all the time.

xfa/fgas/crt/fgas_stream.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 XFA_FGAS_CRT_FGAS_STREAM_H_
 #define XFA_FGAS_CRT_FGAS_STREAM_H_
 
+#include "core/fxcrt/cfx_retain_ptr.h"
 #include "core/fxcrt/fx_stream.h"
 #include "core/fxcrt/fx_system.h"
 
 enum FX_STREAMACCESS {
   FX_STREAMACCESS_Binary = 0x00,
   FX_STREAMACCESS_Text = 0x01,
   FX_STREAMACCESS_Read = 0x02,
   FX_STREAMACCESS_Write = 0x04,
   FX_STREAMACCESS_Truncate = 0x10,
   FX_STREAMACCESS_Append = 0x20,
   FX_STREAMACCESS_Create = 0x80,
 };
 
 enum FX_STREAMSEEK {
   FX_STREAMSEEK_Begin = 0,
   FX_STREAMSEEK_Current,
   FX_STREAMSEEK_End,
 };
 
 class IFGAS_Stream {
  public:
-  static IFGAS_Stream* CreateStream(IFX_SeekableReadStream* pFileRead,
-                                    uint32_t dwAccess);
-  static IFGAS_Stream* CreateStream(IFX_SeekableWriteStream* pFileWrite,
-                                    uint32_t dwAccess);
+  static IFGAS_Stream* CreateStream(
+      const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead,
+      uint32_t dwAccess);
+  static IFGAS_Stream* CreateStream(
+      const CFX_RetainPtr<IFX_SeekableWriteStream>& pFileWrite,
+      uint32_t dwAccess);
   static IFGAS_Stream* CreateStream(uint8_t* pData,
                                     int32_t length,
                                     uint32_t dwAccess);
   static IFGAS_Stream* CreateTextStream(IFGAS_Stream* pBaseStream,
                                         bool bDeleteOnRelease);
 
   virtual ~IFGAS_Stream() {}
   virtual void Release() = 0;
   virtual IFGAS_Stream* Retain() = 0;
 
@@ skipping 11 matching lines @@
                              int32_t iMaxLength,
                              bool& bEOS) = 0;
   virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) = 0;
   virtual int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength) = 0;
   virtual void Flush() = 0;
   virtual bool SetLength(int32_t iLength) = 0;
   virtual int32_t GetBOM(uint8_t bom[4]) const = 0;
   virtual uint16_t GetCodePage() const = 0;
   virtual uint16_t SetCodePage(uint16_t wCodePage) = 0;
 
-  IFX_SeekableReadStream* MakeSeekableReadStream();
+  CFX_RetainPtr<IFX_SeekableReadStream> MakeSeekableReadStream();
 };
 
 
 #endif  // XFA_FGAS_CRT_FGAS_STREAM_H_