Properly ref count IFX_FileAccess.

xfa/fgas/font/cfgas_fontmgr.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_FONT_CFGAS_FONTMGR_H_
 #define XFA_FGAS_FONT_CFGAS_FONTMGR_H_
 
 #include <map>
@@ skipping 161 matching lines @@
   FX_FileHandle* pFileHandle;
   CFX_ByteString bsParentPath;
 };
 
 class CFX_FontSourceEnum_File {
  public:
   CFX_FontSourceEnum_File();
   ~CFX_FontSourceEnum_File();
 
   FX_POSITION GetStartPosition();
-  IFX_FileAccess* GetNext(FX_POSITION& pos);
+  CFX_RetainPtr<IFX_FileAccess> GetNext(FX_POSITION& pos);
 
  private:
   CFX_ByteString GetNextFile();
 
   CFX_WideString m_wsNext;
   CFX_ObjectArray<FX_HandleParentPath> m_FolderQueue;
   CFX_ByteStringArray m_FolderPaths;
 };
 
 class CFGAS_FontMgr {
@@ skipping 57 matching lines @@
   CFX_MapPtrTemplate<uint32_t, CFX_FontDescriptorInfos*> m_Hash2CandidateList;
   CFX_MapPtrTemplate<uint32_t, CFX_ArrayTemplate<CFGAS_GEFont*>*> m_Hash2Fonts;
   std::map<CFGAS_GEFont*, CFX_RetainPtr<IFX_SeekableReadStream> >
       m_IFXFont2FileRead;
   CFX_MapPtrTemplate<FX_WCHAR, CFGAS_GEFont*> m_FailedUnicodes2Nullptr;
   CFX_FontSourceEnum_File* const m_pFontSource;
 };
 #endif
 
 #endif  // XFA_FGAS_FONT_CFGAS_FONTMGR_H_