Fix some misc nits.

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 <memory>
@@ skipping 59 matching lines @@
                                  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;
+    IPVT_FontMap* const m_pFontMap;
   };
 
   CPDF_VariableText();
   ~CPDF_VariableText() override;
 
   void SetProvider(CPDF_VariableText::Provider* pProvider);
   CPDF_VariableText::Iterator* GetIterator();
 
   // CPDF_EditContainer.
   void SetPlateRect(const CFX_FloatRect& rect) override {
@@ skipping 154 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;
   std::unique_ptr<CPDF_VariableText::Iterator> m_pVTIterator;
 };
 
 #endif  // CORE_FPDFDOC_INCLUDE_CPDF_VARIABLETEXT_H_