Remove implicit cast from CFX_WideString to (const wchar_t*)

xfa/fxfa/app/xfa_fftextedit.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/fxfa/app/xfa_fftextedit.h"
 
 #include <vector>
 
@@ skipping 181 matching lines @@
   if (pAcc && pAcc->GetUIType() == XFA_ELEMENT_NumericEdit) {
     IXFA_AppProvider* pAppProvider = GetApp()->GetAppProvider();
     if (pAppProvider) {
       CFX_WideString wsTitle;
       pAppProvider->LoadString(XFA_IDS_AppName, wsTitle);
       CFX_WideString wsMessage;
       CFX_WideString wsError;
       pAppProvider->LoadString(XFA_IDS_ValidateNumberError, wsError);
       CFX_WideString wsSomField;
       pAcc->GetNode()->GetSOMExpression(wsSomField);
-      wsMessage.Format(wsError, (const FX_WCHAR*)wsText,
-                       (const FX_WCHAR*)wsSomField);
+      wsMessage.Format(wsError.c_str(), wsText.c_str(), wsSomField.c_str());
       pAppProvider->MsgBox(wsMessage.AsStringC(), wsTitle.AsStringC(),
                            XFA_MBICON_Error, XFA_MB_OK);
     }
   }
 }
 FX_BOOL CXFA_FFTextEdit::IsDataChanged() {
   return (m_dwStatus & XFA_WIDGETSTATUS_TextEditValueChanged) != 0;
 }
 uint32_t CXFA_FFTextEdit::GetAlignment() {
   uint32_t dwExtendedStyle = 0;
@@ skipping 576 matching lines @@
   uint32_t dwEventID = pEvent->GetClassID();
   if (dwEventID == FWL_EVTHASH_DTP_SelectChanged) {
     CFWL_Event_DtpSelectChanged* event = (CFWL_Event_DtpSelectChanged*)pEvent;
     OnSelectChanged(m_pNormalWidget->GetWidget(), event->iYear, event->iMonth,
                     event->iDay);
     return TRUE;
   } else {
     return CXFA_FFTextEdit::OnProcessEvent(pEvent);
   }
 }