Add more overrides.

core/src/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_SRC_FPDFAPI_FPDF_FONT_TTGSUBTABLE_H_
 #define CORE_SRC_FPDFAPI_FPDF_FONT_TTGSUBTABLE_H_
 
 #include <stdint.h>
@@ skipping 242 matching lines @@
     TSingleSubstFormat1(const TSingleSubstFormat1&);
     TSingleSubstFormat1& operator=(const TSingleSubstFormat1&);
   };
   struct TSingleSubstFormat2 : public TSubTableBase {
     TCoverageFormatBase* Coverage;
     uint16_t GlyphCount;
     uint16_t* Substitute;
     TSingleSubstFormat2() : Coverage(NULL), GlyphCount(0), Substitute(NULL) {
       SubstFormat = 2;
     }
-    ~TSingleSubstFormat2() {
+    ~TSingleSubstFormat2() override {
       delete Coverage;
       delete[] Substitute;
     }
 
    private:
     TSingleSubstFormat2(const TSingleSubstFormat2&);
     TSingleSubstFormat2& operator=(const TSingleSubstFormat2&);
   };
   struct TLookup {
     uint16_t LookupType;
@@ skipping 75 matching lines @@
   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 {}
-  virtual FX_BOOL GetVerticalGlyph(FX_DWORD glyphnum,
-                                   FX_DWORD* vglyphnum) override;
+  FX_BOOL GetVerticalGlyph(FX_DWORD glyphnum, FX_DWORD* vglyphnum) override;
 
   CFX_CTTGSUBTable m_GsubImp;
 };
 
 #endif  // CORE_SRC_FPDFAPI_FPDF_FONT_TTGSUBTABLE_H_