Delete m_ExtHandle and RetainFont

core/fxge/ge/fx_ge_fontmap.cpp

 // 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
 
 #include "core/fxge/include/cfx_fontmapper.h"
 #include "core/fxge/include/ifx_systemfontinfo.h"
 
 CFX_SubstFont::CFX_SubstFont() {
-  m_ExtHandle = nullptr;
   m_Charset = FXFONT_ANSI_CHARSET;
   m_SubstFlags = 0;
   m_Weight = 0;
   m_ItalicAngle = 0;
   m_bSubstCJK = false;
   m_WeightCJK = 0;
   m_bItalicCJK = false;
 }
 
 CTTFontDesc::~CTTFontDesc() {
@@ skipping 80 matching lines @@
                                            FX_BOOL bItalic,
                                            int pitch_family) {
   return nullptr;
 }
 #endif  // PDF_ENABLE_XFA
 
 int IFX_SystemFontInfo::GetFaceIndex(void* hFont) {
   return 0;
 }
 
-void* IFX_SystemFontInfo::RetainFont(void* hFont) {
-  return nullptr;
-}
-
 extern "C" {
 unsigned long _FTStreamRead(FXFT_Stream stream,
                             unsigned long offset,
                             unsigned char* buffer,
                             unsigned long count);
 void _FTStreamClose(FXFT_Stream stream);
 };
 
 #if _FX_OS_ == _FX_ANDROID_
 std::unique_ptr<IFX_SystemFontInfo> IFX_SystemFontInfo::CreateDefault(
     const char** pUnused) {
   return nullptr;
 }
 #endif
 
 CFX_FontFaceInfo::CFX_FontFaceInfo(CFX_ByteString filePath,
                                    CFX_ByteString faceName,
                                    CFX_ByteString fontTables,
                                    uint32_t fontOffset,
                                    uint32_t fileSize)
     : m_FilePath(filePath),
       m_FaceName(faceName),
       m_FontTables(fontTables),
       m_FontOffset(fontOffset),
       m_FileSize(fileSize),
       m_Styles(0),
       m_Charsets(0) {}