Delete m_ExtHandle and RetainFont

core/fxge/android/fx_android_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_ANDROID_FX_ANDROID_FONT_H_
 #define CORE_FXGE_ANDROID_FX_ANDROID_FONT_H_
 
 #include "core/fxcrt/include/fx_system.h"
@@ skipping 22 matching lines @@
                 const FX_CHAR* face,
                 int& bExact) override;
   void* GetFont(const FX_CHAR* face) override;
   uint32_t GetFontData(void* hFont,
                        uint32_t table,
                        uint8_t* buffer,
                        uint32_t size) override;
   FX_BOOL GetFaceName(void* hFont, CFX_ByteString& name) override;
   FX_BOOL GetFontCharset(void* hFont, int& charset) override;
   void DeleteFont(void* hFont) override;
-  void* RetainFont(void* hFont) override;
 
  protected:
   CFPF_SkiaFontMgr* m_pFontMgr;
 };
 
 #endif  // _FX_OS_ == _FX_ANDROID_
 
 #endif  // CORE_FXGE_ANDROID_FX_ANDROID_FONT_H_