Remove implicit cast from CFX_WideString to (const wchar_t*)

xfa/fde/tto/fde_textout.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 "xfa/fde/tto/fde_textout.h"
 
 #include <algorithm>
 
@@ skipping 606 matching lines @@
   if (!m_bElliChanged) {
     return;
   }
   m_bElliChanged = FALSE;
   m_iEllipsisWidth = 0;
   int32_t iLength = m_wsEllipsis.GetLength();
   if (iLength < 1) {
     return;
   }
   ExpandBuffer(iLength, 1);
-  const FX_WCHAR* pStr = (const FX_WCHAR*)m_wsEllipsis;
+  const FX_WCHAR* pStr = m_wsEllipsis.c_str();
   int32_t* pCharWidths = m_pEllCharWidths;
   uint32_t dwBreakStatus;
   FX_WCHAR wch;
   while (iLength-- > 0) {
     wch = *pStr++;
     dwBreakStatus = m_pTxtBreak->AppendChar(wch);
     if (dwBreakStatus > FX_TXTBREAK_PieceBreak) {
       RetrieveEllPieces(pCharWidths);
     }
   }
@@ skipping 228 matching lines @@
     CFDE_TTOLine* pLine = m_ttoLines.GetPtrAt(i);
     if (pLine == NULL || !pLine->m_bNewReload) {
       continue;
     }
     m_iCurLine = i;
     m_iCurPiece = 0;
     ReloadLinePiece(pLine, rect);
   }
 }
 void CFDE_TextOut::ReloadLinePiece(CFDE_TTOLine* pLine, const CFX_RectF& rect) {
-  const FX_WCHAR* pwsStr = (const FX_WCHAR*)m_wsText;
+  const FX_WCHAR* pwsStr = m_wsText.c_str();
   FX_BOOL bVertical = !!(m_dwStyles & FDE_TTOSTYLE_VerticalLayout);
   int32_t iPieceWidths = 0;
   FDE_LPTTOPIECE pPiece = pLine->GetPtrAt(0);
   int32_t iStartChar = pPiece->iStartChar;
   m_fLinePos = bVertical ? pPiece->rtPiece.left : pPiece->rtPiece.top;
   int32_t iPieceCount = pLine->GetSize();
   int32_t iPieceIndex = 0;
   uint32_t dwBreakStatus = 0;
   FX_WCHAR wch;
   while (iPieceIndex < iPieceCount) {
@@ skipping 96 matching lines @@
 }
 int32_t CFDE_TextOut::GetCharRects(FDE_LPTTOPIECE pPiece) {
   FX_TXTRUN tr;
   ToTextRun(pPiece, tr);
   m_rectArray.RemoveAll();
   return m_pTxtBreak->GetCharRects(&tr, m_rectArray);
 }
 void CFDE_TextOut::ToTextRun(const FDE_LPTTOPIECE pPiece, FX_TXTRUN& tr) {
   tr.pAccess = NULL;
   tr.pIdentity = NULL;
-  tr.pStr = (const FX_WCHAR*)m_wsText + pPiece->iStartChar;
+  tr.pStr = (m_wsText + pPiece->iStartChar).c_str();
   tr.pWidths = m_pCharWidths + pPiece->iStartChar;
   tr.iLength = pPiece->iChars;
   tr.pFont = m_pFont;
   tr.fFontSize = m_fFontSize;
   tr.dwStyles = m_dwTxtBkStyles;
   tr.iCharRotation = 0;
   tr.dwCharStyles = pPiece->dwCharStyles;
   tr.wLineBreakChar = m_wParagraphBkChar;
   tr.pRect = &pPiece->rtPiece;
 }
@@ skipping 100 matching lines @@
     return NULL;
   }
   return m_pieces.GetPtrAt(index);
 }
 void CFDE_TTOLine::RemoveLast(int32_t iCount) {
   m_pieces.RemoveLast(iCount);
 }
 void CFDE_TTOLine::RemoveAll(FX_BOOL bLeaveMemory) {
   m_pieces.RemoveAll(bLeaveMemory);
 }