Make down-conversion explicit from CFX_Widetring to CFX_WideStringC.

xfa/fwl/basewidget/fwl_barcodeimp.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/fwl/basewidget/fwl_barcodeimp.h"
 
 #include "xfa/fwl/basewidget/fwl_editimp.h"
 #include "xfa/fwl/core/cfwl_themepart.h"
@@ skipping 152 matching lines @@
   if (dwAttributeMask & FWL_BCDATTRIBUTE_VERSION) {
     m_pBarcodeEngine->SetVersion(pData->GetVersion());
   }
   if (dwAttributeMask & FWL_BCDATTRIBUTE_ECLEVEL) {
     m_pBarcodeEngine->SetErrorCorrectionLevel(pData->GetErrorCorrectionLevel());
   }
   if (dwAttributeMask & FWL_BCDATTRIBUTE_TRUNCATED) {
     m_pBarcodeEngine->SetTruncated(pData->GetTruncated());
   }
   int32_t errorCode = 0;
-  m_dwStatus = m_pBarcodeEngine->Encode(wsText, TRUE, errorCode)
+  m_dwStatus = m_pBarcodeEngine->Encode(wsText.AsWideStringC(), TRUE, errorCode)
                    ? XFA_BCS_EncodeSuccess
                    : 0;
 }
 void CFWL_BarcodeImp::CreateBarcodeEngine() {
   if ((m_pBarcodeEngine == NULL) && (m_type != BC_UNKNOWN)) {
     m_pBarcodeEngine = FX_Barcode_Create(m_type);
   }
 }
 void CFWL_BarcodeImp::ReleaseBarcodeEngine() {
   if (m_pBarcodeEngine) {
@@ skipping 29 matching lines @@
     : CFWL_EditImpDelegate(pOwner) {}
 FWL_ERR CFWL_BarcodeImpDelegate::OnProcessEvent(CFWL_Event* pEvent) {
   uint32_t dwFlag = pEvent->GetClassID();
   if (dwFlag == FWL_EVTHASH_EDT_TextChanged) {
     CFWL_BarcodeImp* pOwner = static_cast<CFWL_BarcodeImp*>(m_pOwner);
     pOwner->ReleaseBarcodeEngine();
     pOwner->m_dwStatus = XFA_BCS_NeedUpdate;
   }
   return CFWL_EditImpDelegate::OnProcessEvent(pEvent);
 }