Fix windows build breakage at 25fa42f398d1

xfa/fgas/font/fgas_stdfontmgr.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_STDFONTMGR_H_
 #define XFA_FGAS_FONT_FGAS_STDFONTMGR_H_
 
 #include "core/fxcrt/include/fx_ext.h"
@@ skipping 33 matching lines @@
   IFX_Font* LoadFont(const FX_WCHAR* pszFileName) override;
   IFX_Font* LoadFont(IFX_Stream* pFontStream,
                      const FX_WCHAR* pszFontAlias = NULL,
                      uint32_t dwFontStyles = 0,
                      uint16_t wCodePage = 0,
                      FX_BOOL bSaveStream = FALSE) override;
   IFX_Font* LoadFont(IFX_Font* pSrcFont,
                      uint32_t dwFontStyles,
                      uint16_t wCodePage = 0xFFFF) override;
 
-  void ClearFontCache();
-  void RemoveFont(IFX_Font* pFont);
+  void ClearFontCache() override;
+  void RemoveFont(IFX_Font* pFont) override;
 
  protected:
   void RemoveFont(CFX_MapPtrToPtr& fontMap, IFX_Font* pFont);
   FX_FONTDESCRIPTOR const* FindFont(const FX_WCHAR* pszFontFamily,
                                     uint32_t dwFontStyles,
                                     uint32_t dwMatchFlags,
                                     uint16_t wCodePage,
                                     uint32_t dwUSB = 999,
                                     FX_WCHAR wUnicode = 0);
   IFX_Font* GetFont(FX_FONTDESCRIPTOR const* pFD, uint32_t dwFontStyles);
@@ skipping 169 matching lines @@
   CFX_MapPtrTemplate<uint32_t, CFX_ArrayTemplate<IFX_Font*>*> m_Hash2Fonts;
   CFX_MapPtrTemplate<uint32_t, IFX_FileAccess*> m_Hash2FileAccess;
   CFX_MapPtrTemplate<uint32_t, IFX_Font*> m_FileAccess2IFXFont;
   CFX_MapPtrTemplate<IFX_Font*, IFX_FileRead*> m_IFXFont2FileRead;
   CFX_MapPtrTemplate<FX_WCHAR, IFX_Font*> m_FailedUnicodes2NULL;
   CFX_FontSourceEnum_File* const m_pFontSource;
 };
 #endif
 
 #endif  // XFA_FGAS_FONT_FGAS_STDFONTMGR_H_