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

core/fpdfapi/fpdf_page/cpdf_textobject.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_page/include/cpdf_textobject.h"
 
 #include "core/fpdfapi/fpdf_font/cpdf_cidfont.h"
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
@@ skipping 124 matching lines @@
                                   int nsegs) {
   if (m_nChars > 1) {
     FX_Free(m_pCharCodes);
     m_pCharCodes = nullptr;
   }
   FX_Free(m_pCharPos);
   m_pCharPos = nullptr;
   CPDF_Font* pFont = m_TextState.GetFont();
   m_nChars = 0;
   for (int i = 0; i < nsegs; ++i) {
-    m_nChars += pFont->CountChar(pStrs[i], pStrs[i].GetLength());
+    m_nChars += pFont->CountChar(pStrs[i].c_str(), pStrs[i].GetLength());
   }
   m_nChars += nsegs - 1;
   if (m_nChars > 1) {
     m_pCharCodes = FX_Alloc(uint32_t, m_nChars);
     m_pCharPos = FX_Alloc(FX_FLOAT, m_nChars - 1);
     int index = 0;
     for (int i = 0; i < nsegs; ++i) {
-      const FX_CHAR* segment = pStrs[i];
-      int offset = 0, len = pStrs[i].GetLength();
+      const FX_CHAR* segment = pStrs[i].c_str();
+      int len = pStrs[i].GetLength();
+      int offset = 0;
       while (offset < len) {
         m_pCharCodes[index++] = pFont->GetNextChar(segment, len, offset);
       }
       if (i != nsegs - 1) {
         m_pCharPos[index - 1] = pKerning[i];
         m_pCharCodes[index++] = CPDF_Font::kInvalidCharCode;
       }
     }
   } else {
     int offset = 0;
     m_pCharCodes = (uint32_t*)(uintptr_t)pFont->GetNextChar(
-        pStrs[0], pStrs[0].GetLength(), offset);
+        pStrs[0].c_str(), pStrs[0].GetLength(), offset);
   }
 }
 
 void CPDF_TextObject::SetText(const CFX_ByteString& str) {
   SetSegments(&str, nullptr, 1);
   RecalcPositionData();
 }
 
 FX_FLOAT CPDF_TextObject::GetCharWidth(uint32_t charcode) const {
   FX_FLOAT fontsize = m_TextState.GetFontSize() / 1000;
@@ skipping 163 matching lines @@
 void CPDF_TextObject::SetPosition(FX_FLOAT x, FX_FLOAT y) {
   FX_FLOAT dx = x - m_PosX;
   FX_FLOAT dy = y - m_PosY;
   m_PosX = x;
   m_PosY = y;
   m_Left += dx;
   m_Right += dx;
   m_Top += dy;
   m_Bottom += dy;
 }