Cleanup various IFX_ text interfaces.

core/fpdfapi/fpdf_font/ttgsubtable.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_FPDFAPI_FPDF_FONT_TTGSUBTABLE_H_
 #define CORE_FPDFAPI_FPDF_FONT_TTGSUBTABLE_H_
 
 #include <stdint.h>
 
 #include <map>
 
 #include "core/fxcrt/include/fx_basic.h"
 #include "core/fxge/include/fx_font.h"
 #include "core/fxge/include/fx_freetype.h"
 
 class CFX_GlyphMap {
  public:
   CFX_GlyphMap();
   ~CFX_GlyphMap();
   void SetAt(int key, int value);
   FX_BOOL Lookup(int key, int& value);
 
  protected:
   CFX_BinaryBuf m_Buffer;
 };
+
 class CFX_CTTGSUBTable {
  public:
   CFX_CTTGSUBTable(void) : m_bFeautureMapLoad(FALSE), loaded(false) {}
   CFX_CTTGSUBTable(FT_Bytes gsub) : m_bFeautureMapLoad(FALSE), loaded(false) {
     LoadGSUBTable(gsub);
   }
   virtual ~CFX_CTTGSUBTable() {}
   bool IsOk(void) const { return loaded; }
   bool LoadGSUBTable(FT_Bytes gsub);
   bool GetVerticalGlyph(uint32_t glyphnum, uint32_t* vglyphnum);
@@ skipping 307 matching lines @@
     return ret;
   }
   std::map<uint32_t, uint32_t> m_featureMap;
   FX_BOOL m_bFeautureMapLoad;
   bool loaded;
   struct tt_gsub_header header;
   struct TScriptList ScriptList;
   struct TFeatureList FeatureList;
   struct TLookupList LookupList;
 };
-class CFX_GSUBTable final : public IFX_GSUBTable {
- public:
-  ~CFX_GSUBTable() override {}
-  FX_BOOL GetVerticalGlyph(uint32_t glyphnum, uint32_t* vglyphnum) override;
-
-  CFX_CTTGSUBTable m_GsubImp;
-};
 
 #endif  // CORE_FPDFAPI_FPDF_FONT_TTGSUBTABLE_H_