Refcount all the IFX_ stream classes all the time.

core/fxge/fx_font.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_FXGE_FX_FONT_H_
 #define CORE_FXGE_FX_FONT_H_
 
 #include <memory>
@@ skipping 93 matching lines @@
                  int weight,
                  int italic_angle,
                  int CharsetCP,
                  bool bVertical);
 
   bool LoadEmbedded(const uint8_t* data, uint32_t size);
   FXFT_Face GetFace() const { return m_Face; }
   CFX_SubstFont* GetSubstFont() const { return m_pSubstFont.get(); }
 
 #ifdef PDF_ENABLE_XFA
-  bool LoadFile(IFX_SeekableReadStream* pFile,
+  bool LoadFile(const CFX_RetainPtr<IFX_SeekableReadStream>& pFile,
                 int nFaceIndex = 0,
                 int* pFaceCount = nullptr);
 
   bool LoadClone(const CFX_Font* pFont);
   void SetFace(FXFT_Face face);
   void SetSubstFont(std::unique_ptr<CFX_SubstFont> subst) {
     m_pSubstFont = std::move(subst);
   }
 #endif  // PDF_ENABLE_XFA
 
@@ skipping 116 matching lines @@
                            FX_FLOAT retinaScaleX = 1.0f,
                            FX_FLOAT retinaScaleY = 1.0f);
 
 CFX_ByteString GetNameFromTT(const uint8_t* name_table,
                              uint32_t name_table_size,
                              uint32_t name);
 
 int PDF_GetStandardFontName(CFX_ByteString* name);
 
 #endif  // CORE_FXGE_FX_FONT_H_