Remove implicit cast from CFX_WideString to (const wchar_t*)

core/fxcrt/fx_arabic.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/fxcrt/include/fx_arabic.h"
 #include "core/fxcrt/include/fx_ucd.h"
 
 namespace {
@@ skipping 203 matching lines @@
     eType = FX_CHARTYPE_Unknown;
   }
   return pFT;
 }
 void FX_BidiReverseString(CFX_WideString& wsText,
                           int32_t iStart,
                           int32_t iCount) {
   FXSYS_assert(iStart > -1 && iStart < wsText.GetLength());
   FXSYS_assert(iCount >= 0 && iStart + iCount <= wsText.GetLength());
   FX_WCHAR wch;
-  FX_WCHAR* pStart = (FX_WCHAR*)(const FX_WCHAR*)wsText;
+  FX_WCHAR* pStart = const_cast<FX_WCHAR*>(wsText.c_str());
   pStart += iStart;
   FX_WCHAR* pEnd = pStart + iCount - 1;
   while (pStart < pEnd) {
     wch = *pStart;
     *pStart++ = *pEnd;
     *pEnd-- = wch;
   }
 }
 void FX_BidiSetDeferredRun(CFX_Int32Array& values,
                            int32_t iStart,
@@ skipping 10 matching lines @@
     FX_BIDICLASS_EN,  FX_BIDICLASS_AL,  FX_BIDICLASS_NSM, FX_BIDICLASS_CS,
     FX_BIDICLASS_ES,  FX_BIDICLASS_ET,  FX_BIDICLASS_BN,  FX_BIDICLASS_BN,
     FX_BIDICLASS_N,   FX_BIDICLASS_B,   FX_BIDICLASS_RLO, FX_BIDICLASS_RLE,
     FX_BIDICLASS_LRO, FX_BIDICLASS_LRE, FX_BIDICLASS_PDF, FX_BIDICLASS_ON,
 };
 void FX_BidiClassify(const CFX_WideString& wsText,
                      CFX_Int32Array& classes,
                      FX_BOOL bWS) {
   FXSYS_assert(wsText.GetLength() == classes.GetSize());
   int32_t iCount = wsText.GetLength();
-  const FX_WCHAR* pwsStart = (const FX_WCHAR*)wsText;
+  const FX_WCHAR* pwsStart = wsText.c_str();
   FX_WCHAR wch;
   int32_t iCls;
   if (bWS) {
     for (int32_t i = 0; i < iCount; i++) {
       wch = *pwsStart++;
       iCls =
           ((kTextLayoutCodeProperties[(uint16_t)wch] & FX_BIDICLASSBITSMASK) >>
            FX_BIDICLASSBITS);
       classes.SetAt(i, iCls);
     }
@@ skipping 692 matching lines @@
   }
 };
 void FX_BidiLine(CFX_TxtCharArray& chars, int32_t iCount, int32_t iBaseLevel) {
   CFX_BidiLineTemplate<CFX_TxtChar> blt;
   blt.FX_BidiLine(chars, iCount, iBaseLevel);
 }
 void FX_BidiLine(CFX_RTFCharArray& chars, int32_t iCount, int32_t iBaseLevel) {
   CFX_BidiLineTemplate<CFX_RTFChar> blt;
   blt.FX_BidiLine(chars, iCount, iBaseLevel);
 }