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

fpdfsdk/pdfwindow/PWL_FontMap.cpp

 // 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
 
 #include "fpdfsdk/pdfwindow/PWL_FontMap.h"
 
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
 #include "core/fpdfapi/fpdf_font/include/cpdf_fontencoding.h"
@@ skipping 288 matching lines @@
 }
 
 CPDF_Font* CPWL_FontMap::AddStandardFont(CPDF_Document* pDoc,
                                          CFX_ByteString& sFontName) {
   if (!pDoc)
     return NULL;
 
   CPDF_Font* pFont = NULL;
 
   if (sFontName == "ZapfDingbats") {
-    pFont = pDoc->AddStandardFont(sFontName, NULL);
+    pFont = pDoc->AddStandardFont(sFontName.c_str(), NULL);
   } else {
     CPDF_FontEncoding fe(PDFFONT_ENCODING_WINANSI);
-    pFont = pDoc->AddStandardFont(sFontName, &fe);
+    pFont = pDoc->AddStandardFont(sFontName.c_str(), &fe);
   }
 
   return pFont;
 }
 
 CPDF_Font* CPWL_FontMap::AddSystemFont(CPDF_Document* pDoc,
                                        CFX_ByteString& sFontName,
                                        uint8_t nCharset) {
   if (!pDoc)
     return NULL;
@@ skipping 170 matching lines @@
 
 CPWL_DocFontMap::CPWL_DocFontMap(IFX_SystemHandler* pSystemHandler,
                                  CPDF_Document* pAttachedDoc)
     : CPWL_FontMap(pSystemHandler), m_pAttachedDoc(pAttachedDoc) {}
 
 CPWL_DocFontMap::~CPWL_DocFontMap() {}
 
 CPDF_Document* CPWL_DocFontMap::GetDocument() {
   return m_pAttachedDoc;
 }