Refcount all the IFX_ stream classes all the time.

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>
 #include <memory>
 #include <vector>
 
 #include "core/fxcrt/fx_ext.h"
 #include "core/fxge/cfx_fontmapper.h"
 #include "core/fxge/fx_freetype.h"
 #include "core/fxge/ifx_systemfontinfo.h"
 #include "third_party/freetype/include/freetype/fttypes.h"
 #include "xfa/fgas/crt/fgas_stream.h"
 #include "xfa/fgas/font/cfgas_fontmgr.h"
@@ skipping 187 matching lines @@
                                 uint32_t dwFontStyles,
                                 uint16_t wCodePage) {
     return GetFontByCodePage(wCodePage, dwFontStyles, pszFontFamily);
   }
 
  private:
   bool EnumFonts();
   bool EnumFontsFromFontMapper();
   bool EnumFontsFromFiles();
   void RegisterFace(FXFT_Face pFace, const CFX_WideString* pFaceName);
-  void RegisterFaces(IFX_SeekableReadStream* pFontStream,
+  void RegisterFaces(const CFX_RetainPtr<IFX_SeekableReadStream>& pFontStream,
                      const CFX_WideString* pFaceName);
   void GetNames(const uint8_t* name_table, CFX_WideStringArray& Names);
   std::vector<uint16_t> GetCharsets(FXFT_Face pFace) const;
   void GetUSBCSB(FXFT_Face pFace, uint32_t* USB, uint32_t* CSB);
   uint32_t GetFlags(FXFT_Face pFace);
   bool VerifyUnicode(CFX_FontDescriptor* pDesc, FX_WCHAR wcUnicode);
   bool VerifyUnicode(CFGAS_GEFont* pFont, FX_WCHAR wcUnicode);
   int32_t IsPartName(const CFX_WideString& Name1, const CFX_WideString& Name2);
   int32_t MatchFonts(CFX_FontDescriptorInfos& MatchedFonts,
                      uint16_t wCodePage,
                      uint32_t dwFontStyles,
                      const CFX_WideString& FontName,
                      FX_WCHAR wcUnicode = 0xFFFE);
   int32_t CalcPenalty(CFX_FontDescriptor* pInstalled,
                       uint16_t wCodePage,
                       uint32_t dwFontStyles,
                       const CFX_WideString& FontName,
                       FX_WCHAR wcUnicode = 0xFFFE);
   CFGAS_GEFont* LoadFont(const CFX_WideString& wsFaceName,
                          int32_t iFaceIndex,
                          int32_t* pFaceCount);
-  FXFT_Face LoadFace(IFX_SeekableReadStream* pFontStream, int32_t iFaceIndex);
-  IFX_SeekableReadStream* CreateFontStream(CFX_FontMapper* pFontMapper,
-                                           IFX_SystemFontInfo* pSystemFontInfo,
-                                           uint32_t index);
-  IFX_SeekableReadStream* CreateFontStream(const CFX_ByteString& bsFaceName);
+  FXFT_Face LoadFace(const CFX_RetainPtr<IFX_SeekableReadStream>& pFontStream,
+                     int32_t iFaceIndex);
+  CFX_RetainPtr<IFX_SeekableReadStream> CreateFontStream(
+      CFX_FontMapper* pFontMapper,
+      IFX_SystemFontInfo* pSystemFontInfo,
+      uint32_t index);
+  CFX_RetainPtr<IFX_SeekableReadStream> CreateFontStream(
+      const CFX_ByteString& bsFaceName);
 
   CFX_FontDescriptors m_InstalledFonts;
   CFX_MapPtrTemplate<uint32_t, CFX_FontDescriptorInfos*> m_Hash2CandidateList;
   CFX_MapPtrTemplate<uint32_t, CFX_ArrayTemplate<CFGAS_GEFont*>*> m_Hash2Fonts;
-  CFX_MapPtrTemplate<CFGAS_GEFont*, IFX_SeekableReadStream*> m_IFXFont2FileRead;
+  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_