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

core/fpdfdoc/doc_basic.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 "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
 #include "core/fpdfdoc/doc_utils.h"
 #include "core/fpdfdoc/include/fpdf_doc.h"
@@ skipping 493 matching lines @@
   int nPages = m_pDocument->GetPageCount();
   CFX_ByteString bsLbl;
   CFX_ByteString bsOrig = bsLabel;
   for (int i = 0; i < nPages; i++) {
     bsLbl = PDF_EncodeText(GetLabel(i));
     if (!bsLbl.Compare(bsOrig.AsStringC())) {
       return i;
     }
   }
   bsLbl = bsOrig;
-  int nPage = FXSYS_atoi(bsLbl);
+  int nPage = FXSYS_atoi(bsLbl.c_str());
   if (nPage > 0 && nPage <= nPages) {
     return nPage;
   }
   return -1;
 }
 int32_t CPDF_PageLabel::GetPageByLabel(const CFX_WideStringC& wsLabel) const {
   return GetPageByLabel(PDF_EncodeText(wsLabel.c_str()).AsStringC());
 }