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

core/fpdftext/fpdf_text_int.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/fpdftext/fpdf_text_int.h"
 
 #include <algorithm>
 #include <cctype>
@@ skipping 888 matching lines @@
 
 int CPDF_TextPage::GetCharWidth(uint32_t charCode, CPDF_Font* pFont) const {
   if (charCode == CPDF_Font::kInvalidCharCode)
     return 0;
 
   if (int w = pFont->GetCharWidthF(charCode))
     return w;
 
   CFX_ByteString str;
   pFont->AppendChar(str, charCode);
-  if (int w = pFont->GetStringWidth(str, 1))
+  if (int w = pFont->GetStringWidth(str.c_str(), 1))
     return w;
 
   return pFont->GetCharBBox(charCode).Width();
 }
 
 void CPDF_TextPage::OnPiece(CFX_BidiChar* pBidi, CFX_WideString& str) {
   CFX_BidiChar::Segment seg = pBidi->GetSegmentInfo();
   if (seg.direction == CFX_BidiChar::RIGHT) {
     for (int i = seg.start + seg.count; i > seg.start; i--) {
       m_TextBuf.AppendChar(str.GetAt(i - i));
@@ skipping 1591 matching lines @@
   if (!m_bIsParsed || index < 0 || index >= m_LinkList.GetSize()) {
     return;
   }
   CPDF_LinkExt* link = NULL;
   link = m_LinkList.GetAt(index);
   if (!link) {
     return;
   }
   m_pTextPage->GetRectArray(link->m_Start, link->m_Count, rects);
 }