Use a std::vector in fpdf_font code.

core/fpdfapi/fpdf_font/cpdf_simplefont.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_FPDFAPI_FPDF_FONT_CPDF_SIMPLEFONT_H_
 #define CORE_FPDFAPI_FPDF_FONT_CPDF_SIMPLEFONT_H_
 
+#include <vector>
+
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
 #include "core/fpdfapi/fpdf_font/include/cpdf_fontencoding.h"
 #include "core/fxcrt/include/fx_string.h"
 #include "core/fxcrt/include/fx_system.h"
 
 class CPDF_SimpleFont : public CPDF_Font {
  public:
   CPDF_SimpleFont();
   ~CPDF_SimpleFont() override;
 
@@ skipping 10 matching lines @@
  protected:
   virtual void LoadGlyphMap() = 0;
 
   FX_BOOL LoadCommon();
   void LoadSubstFont();
   void LoadCharMetrics(int charcode);
 
   CPDF_FontEncoding m_Encoding;
   uint16_t m_GlyphIndex[256];
   uint16_t m_ExtGID[256];
-  CFX_ByteString* m_pCharNames;
+  std::vector<CFX_ByteString> m_CharNames;
   int m_BaseEncoding;
   uint16_t m_CharWidth[256];
   FX_SMALL_RECT m_CharBBox[256];
   FX_BOOL m_bUseFontWidth;
 };
 
 #endif  // CORE_FPDFAPI_FPDF_FONT_CPDF_SIMPLEFONT_H_