Remove some dead code.

core/fpdfdoc/include/cpdf_variabletext.h

 // Copyright 2016 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_FPDFDOC_INCLUDE_CPDF_VARIABLETEXT_H_
 #define CORE_FPDFDOC_INCLUDE_CPDF_VARIABLETEXT_H_
 
 #include "core/fpdfdoc/cpvt_floatrect.h"
 #include "core/fpdfdoc/cpvt_lineinfo.h"
 #include "core/fpdfdoc/include/cpvt_line.h"
 #include "core/fpdfdoc/include/cpvt_wordplace.h"
 #include "core/fpdfdoc/include/cpvt_wordrange.h"
 #include "core/fpdfdoc/pdf_vt.h"
 #include "core/fxcrt/include/fx_coordinates.h"
 #include "core/fxcrt/include/fx_string.h"
 #include "core/fxcrt/include/fx_system.h"
 
 class CSection;
 class IPVT_FontMap;
 
 struct CPVT_SecProps;
 struct CPVT_Section;
 struct CPVT_SectionInfo;
 struct CPVT_Word;
+struct CPVT_WordInfo;
 struct CPVT_WordProps;
-struct CPVT_WordInfo;
 
 #define VARIABLETEXT_HALF 0.5f
 
 class CPDF_VariableText : private CPDF_EditContainer {
  public:
   enum class ScriptType { Normal, Super, Sub };
 
   class Iterator {
    public:
     explicit Iterator(CPDF_VariableText* pVT);
@@ skipping 14 matching lines @@
     void SetAt(const CPVT_WordPlace& place);
     const CPVT_WordPlace& GetAt() const { return m_CurPos; }
 
    private:
     CPVT_WordPlace m_CurPos;
     CPDF_VariableText* const m_pVT;
   };
 
   class Provider {
    public:
-    Provider(IPVT_FontMap* pFontMap);
+    explicit Provider(IPVT_FontMap* pFontMap);
     virtual ~Provider();
 
     virtual int32_t GetCharWidth(int32_t nFontIndex,
                                  uint16_t word,
                                  int32_t nWordStyle);
     virtual int32_t GetTypeAscent(int32_t nFontIndex);
     virtual int32_t GetTypeDescent(int32_t nFontIndex);
     virtual int32_t GetWordFontIndex(uint16_t word,
                                      int32_t charset,
                                      int32_t nFontIndex);
     virtual FX_BOOL IsLatinWord(uint16_t word);
     virtual int32_t GetDefaultFontIndex();
 
    private:
     IPVT_FontMap* m_pFontMap;
   };
 
   CPDF_VariableText();
-  virtual ~CPDF_VariableText();
+  ~CPDF_VariableText() override;
 
-  CPDF_VariableText::Provider* SetProvider(
-      CPDF_VariableText::Provider* pProvider);
+  void SetProvider(CPDF_VariableText::Provider* pProvider);
   CPDF_VariableText::Iterator* GetIterator();
 
   // CPDF_EditContainer.
   void SetPlateRect(const CFX_FloatRect& rect) override {
     CPDF_EditContainer::SetPlateRect(rect);
   }
   CFX_FloatRect GetContentRect() const override;
   const CFX_FloatRect& GetPlateRect() const override {
     return CPDF_EditContainer::GetPlateRect();
   }
@@ skipping 148 matching lines @@
   int32_t m_nHorzScale;
   uint16_t m_wSubWord;
   FX_FLOAT m_fFontSize;
   FX_BOOL m_bInitial;
   FX_BOOL m_bRichText;
   CPDF_VariableText::Provider* m_pVTProvider;
   CPDF_VariableText::Iterator* m_pVTIterator;
 };
 
 #endif  // CORE_FPDFDOC_INCLUDE_CPDF_VARIABLETEXT_H_