Reland of Fix leaked internal font

xfa/fgas/font/fgas_gefont.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_FGAS_GEFONT_H_
 #define XFA_FGAS_FONT_FGAS_GEFONT_H_
 
 #include <map>
 
 #include "core/fxcrt/include/fx_memory.h"
 #include "xfa/fgas/crt/fgas_utils.h"
 #include "xfa/fgas/font/fgas_font.h"
 
 #define FXFONT_SUBST_ITALIC 0x02
 
 class CFX_UnicodeEncoding;
 class CXFA_PDFFontMgr;
 
 class CFGAS_GEFont {
  public:
   static CFGAS_GEFont* LoadFont(const FX_WCHAR* pszFontFamily,
                                 uint32_t dwFontStyles,
                                 uint16_t wCodePage,
                                 IFGAS_FontMgr* pFontMgr);
-  static CFGAS_GEFont* LoadFont(CFX_Font* pExtFont, IFGAS_FontMgr* pFontMgr);
+  static CFGAS_GEFont* LoadFont(CFX_Font* pExternalFont,
+                                IFGAS_FontMgr* pFontMgr);
+  static CFGAS_GEFont* LoadFont(std::unique_ptr<CFX_Font> pInternalFont,
+                                IFGAS_FontMgr* pFontMgr);
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
   static CFGAS_GEFont* LoadFont(const uint8_t* pBuffer,
                                 int32_t iLength,
                                 IFGAS_FontMgr* pFontMgr);
   static CFGAS_GEFont* LoadFont(IFX_Stream* pFontStream,
                                 IFGAS_FontMgr* pFontMgr,
                                 FX_BOOL bSaveStream);
 #endif
 
   ~CFGAS_GEFont();
@@ skipping 29 matching lines @@
   explicit CFGAS_GEFont(IFGAS_FontMgr* pFontMgr);
   CFGAS_GEFont(CFGAS_GEFont* src, uint32_t dwFontStyles);
 
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
   FX_BOOL LoadFontInternal(const FX_WCHAR* pszFontFamily,
                            uint32_t dwFontStyles,
                            uint16_t wCodePage);
   FX_BOOL LoadFontInternal(const uint8_t* pBuffer, int32_t length);
   FX_BOOL LoadFontInternal(IFX_Stream* pFontStream, FX_BOOL bSaveStream);
 #endif
-  FX_BOOL LoadFontInternal(CFX_Font* pExtFont);
+  FX_BOOL LoadFontInternal(CFX_Font* pExternalFont);
+  FX_BOOL LoadFontInternal(std::unique_ptr<CFX_Font> pInternalFont);
   FX_BOOL InitFont();
   FX_BOOL GetCharBBoxInternal(FX_WCHAR wUnicode,
                               CFX_Rect& bbox,
                               FX_BOOL bRecursive,
                               FX_BOOL bCharCode = FALSE);
   FX_BOOL GetCharWidthInternal(FX_WCHAR wUnicode,
                                int32_t& iWidth,
                                FX_BOOL bRecursive,
                                FX_BOOL bCharCode = FALSE);
   int32_t GetGlyphIndex(FX_WCHAR wUnicode,
                         FX_BOOL bRecursive,
                         CFGAS_GEFont** ppFont,
                         FX_BOOL bCharCode = FALSE);
 
 #if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
   FX_BOOL m_bUseLogFontStyle;
   uint32_t m_dwLogFontStyle;
 #endif
   CFX_Font* m_pFont;
   CFGAS_GEFont* const m_pSrcFont;
   IFGAS_FontMgr* const m_pFontMgr;
   int32_t m_iRefCount;
-  FX_BOOL m_bExtFont;
+  bool m_bExternalFont;
   std::unique_ptr<IFX_Stream, ReleaseDeleter<IFX_Stream>> m_pStream;
   std::unique_ptr<IFX_FileRead, ReleaseDeleter<IFX_FileRead>> m_pFileRead;
   std::unique_ptr<CFX_UnicodeEncoding> m_pFontEncoding;
   std::unique_ptr<CFX_DiscreteArrayTemplate<uint16_t>> m_pCharWidthMap;
   std::unique_ptr<CFX_MassArrayTemplate<CFX_Rect>> m_pRectArray;
   std::unique_ptr<CFX_MapPtrToPtr> m_pBBoxMap;
   CXFA_PDFFontMgr* m_pProvider;  // not owned.
   CFX_ArrayTemplate<CFGAS_GEFont*> m_SubstFonts;
   std::map<FX_WCHAR, CFGAS_GEFont*> m_FontMapper;
 };
 
 #endif  // XFA_FGAS_FONT_FGAS_GEFONT_H_