Properly ref count IFX_FileAccess.

core/fxcrt/fx_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 CORE_FXCRT_FX_STREAM_H_
 #define CORE_FXCRT_FX_STREAM_H_
 
 #include "core/fxcrt/cfx_retain_ptr.h"
@@ skipping 125 matching lines @@
   FX_FILESIZE GetPosition() override = 0;
   size_t ReadBlock(void* buffer, size_t size) override = 0;
 
   virtual bool ReadNextBlock(bool bRestart = false) = 0;
   virtual const uint8_t* GetBlockBuffer() = 0;
   virtual size_t GetBlockSize() = 0;
   virtual FX_FILESIZE GetBlockOffset() = 0;
 };
 
 #ifdef PDF_ENABLE_XFA
-class IFX_FileAccess {
+class IFX_FileAccess : public CFX_Retainable {
  public:
-  static IFX_FileAccess* CreateDefault(const CFX_WideStringC& wsPath);
+  static CFX_RetainPtr<IFX_FileAccess> CreateDefault(
+      const CFX_WideStringC& wsPath);
 
-  virtual ~IFX_FileAccess() {}
-  virtual void Release() = 0;
-  virtual IFX_FileAccess* Retain() = 0;
   virtual void GetPath(CFX_WideString& wsPath) = 0;
   virtual CFX_RetainPtr<IFX_SeekableStream> CreateFileStream(
       uint32_t dwModes) = 0;
 };
 #endif  // PDF_ENABLE_XFA
 
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
 class CFindFileData {
  public:
   virtual ~CFindFileData() {}
   HANDLE m_Handle;
   bool m_bEnd;
 };
 
 class CFindFileDataA : public CFindFileData {
  public:
   ~CFindFileDataA() override {}
   WIN32_FIND_DATAA m_FindData;
 };
 
 class CFindFileDataW : public CFindFileData {
  public:
   ~CFindFileDataW() override {}
   WIN32_FIND_DATAW m_FindData;
 };
 #endif
 
 #endif  // CORE_FXCRT_FX_STREAM_H_