Remove implicit cast from CFX_WideString to (const wchar_t*)

fpdfsdk/fsdk_baseform.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 "fpdfsdk/include/fsdk_baseform.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 700 matching lines @@
   return m_bAppModified;
 }
 
 #ifdef PDF_ENABLE_XFA
 void CPDFSDK_Widget::ResetAppearance(FX_BOOL bValueChanged) {
   switch (GetFieldType()) {
     case FIELDTYPE_TEXTFIELD:
     case FIELDTYPE_COMBOBOX: {
       FX_BOOL bFormated = FALSE;
       CFX_WideString sValue = OnFormat(bFormated);
-      ResetAppearance(bFormated ? sValue : nullptr, TRUE);
+      ResetAppearance(bFormated ? sValue.c_str() : nullptr, TRUE);
     } break;
     default:
       ResetAppearance(nullptr, FALSE);
       break;
   }
 }
 #endif  // PDF_ENABLE_XFA
 
 void CPDFSDK_Widget::ResetAppearance(const FX_WCHAR* sValue,
                                      FX_BOOL bValueChanged) {
@@ skipping 807 matching lines @@
     }
 
     int nMaxLen = pField->GetMaxLen();
     FX_BOOL bCharArray = (dwFieldFlags >> 24) & 1;
     FX_FLOAT fFontSize = GetFontSize();
 
 #ifdef PDF_ENABLE_XFA
     CFX_WideString sValueTmp;
     if (!sValue && GetMixXFAWidget()) {
       sValueTmp = GetValue(TRUE);
-      sValue = sValueTmp;
+      sValue = sValueTmp.c_str();
     }
 #endif  // PDF_ENABLE_XFA
 
     if (nMaxLen > 0) {
       if (bCharArray) {
         pEdit->SetCharArray(nMaxLen);
 
         if (IsFloatZero(fFontSize)) {
           fFontSize = CPWL_Edit::GetCharArrayAutoFontSize(
               font_map.GetPDFFont(0), rcClient, nMaxLen);
@@ skipping 1265 matching lines @@
       break;
     }
   }
 }
 
 CFX_FloatRect CBA_AnnotIterator::GetAnnotRect(const CPDFSDK_Annot* pAnnot) {
   CFX_FloatRect rcAnnot;
   pAnnot->GetPDFAnnot()->GetRect(rcAnnot);
   return rcAnnot;
 }