Remove implicit cast from CFX_ByteString to (const char*).

core/fpdfapi/fpdf_font/cpdf_type3font.cpp

 // 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
 
 #include "core/fpdfapi/fpdf_font/cpdf_type3font.h"
 
 #include "core/fpdfapi/fpdf_font/cpdf_type3char.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_form.h"
@@ skipping 55 matching lines @@
       m_CharWidthL[StartChar + i] =
           FXSYS_round(pWidthArray->GetNumberAt(i) * xscale * 1000);
     }
   }
   m_pCharProcs = m_pFontDict->GetDictBy("CharProcs");
   CPDF_Object* pEncoding = m_pFontDict->GetDirectObjectBy("Encoding");
   if (pEncoding) {
     LoadPDFEncoding(pEncoding, m_BaseEncoding, m_pCharNames, FALSE, FALSE);
     if (m_pCharNames) {
       for (int i = 0; i < 256; i++) {
-        m_Encoding.m_Unicodes[i] = PDF_UnicodeFromAdobeName(m_pCharNames[i]);
+        m_Encoding.m_Unicodes[i] =
+            PDF_UnicodeFromAdobeName(m_pCharNames[i].c_str());
         if (m_Encoding.m_Unicodes[i] == 0) {
           m_Encoding.m_Unicodes[i] = i;
         }
       }
     }
   }
   return TRUE;
 }
 
 void CPDF_Type3Font::CheckType3FontMetrics() {
@@ skipping 64 matching lines @@
     return m_CharWidthL[charcode];
 
   const CPDF_Type3Char* pChar = LoadChar(charcode, level);
   return pChar ? pChar->m_Width : 0;
 }
 
 FX_RECT CPDF_Type3Font::GetCharBBox(uint32_t charcode, int level) {
   const CPDF_Type3Char* pChar = LoadChar(charcode, level);
   return pChar ? pChar->m_BBox : FX_RECT();
 }