Refactor fx_font part 4

core/fxge/include/cfx_fontmapper.h

 // Copyright 2016 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_INCLUDE_CFX_FONTMAPPER_H_
 #define CORE_FXGE_INCLUDE_CFX_FONTMAPPER_H_
 
 #include <memory>
 #include <vector>
 
 #include "core/fxge/include/cfx_fontmgr.h"
 #include "core/fxge/include/fx_font.h"
 
+class CFX_SubstFont;
+
 class CFX_FontMapper {
  public:
   explicit CFX_FontMapper(CFX_FontMgr* mgr);
   ~CFX_FontMapper();
 
   void SetSystemFontInfo(std::unique_ptr<IFX_SystemFontInfo> pFontInfo);
   IFX_SystemFontInfo* GetSystemFontInfo() { return m_pFontInfo.get(); }
   void AddInstalledFont(const CFX_ByteString& name, int charset);
   void LoadInstalledFonts();
 
@@ skipping 47 matching lines @@
   FX_BOOL m_bListLoaded;
   FXFT_Face m_MMFaces[MM_FACE_COUNT];
   CFX_ByteString m_LastFamily;
   std::vector<FaceData> m_FaceArray;
   std::unique_ptr<IFX_SystemFontInfo> m_pFontInfo;
   FXFT_Face m_FoxitFaces[FOXIT_FACE_COUNT];
   CFX_FontMgr* const m_pFontMgr;
 };
 
 #endif  // CORE_FXGE_INCLUDE_CFX_FONTMAPPER_H_