Make down-conversion explicit from CFX_Widetring to CFX_WideStringC.

xfa/fxfa/app/xfa_ffdocview.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/include/fxfa/xfa_ffdocview.h"
 
 #include "core/fxcrt/include/fx_ext.h"
 #include "xfa/fxfa/app/xfa_ffbarcode.h"
@@ skipping 144 matching lines @@
       CFX_WideString wsLimit;
       pAppProvider->LoadString(XFA_IDS_ValidateLimit, wsLimit);
       if (!wsLimit.IsEmpty()) {
         CFX_WideString wsTemp;
         wsTemp.Format((const FX_WCHAR*)wsLimit, iRemain);
         wsMsg += FX_WSTRC(L"\n") + wsTemp;
       }
     }
     CFX_WideString wsTitle;
     pAppProvider->LoadString(XFA_IDS_AppName, wsTitle);
-    pAppProvider->MsgBox(wsMsg, wsTitle, XFA_MBICON_Status, XFA_MB_OK);
+    pAppProvider->MsgBox(wsMsg.AsWideStringC(), wsTitle.AsWideStringC(),
+                         XFA_MBICON_Status, XFA_MB_OK);
   }
   m_arrNullTestMsg.RemoveAll();
 }
 void CXFA_FFDocView::UpdateDocView() {
   if (IsUpdateLocked()) {
     return;
   }
   LockUpdate();
   int32_t iNewAdds = m_NewAddedNodes.GetSize();
   for (int32_t i = 0; i < iNewAdds; i++) {
@@ skipping 332 matching lines @@
     return NULL;
   }
   CXFA_Node* refNode = NULL;
   if (pRefWidgetAcc) {
     refNode = pRefWidgetAcc->GetNode();
     wsExpression = wsName;
   } else {
     wsExpression = L"$form." + wsName;
   }
   XFA_RESOLVENODE_RS resoveNodeRS;
-  int32_t iRet = pScriptContext->ResolveObjects(refNode, wsExpression,
-                                                resoveNodeRS, dwStyle);
+  int32_t iRet = pScriptContext->ResolveObjects(
+      refNode, wsExpression.AsWideStringC(), resoveNodeRS, dwStyle);
   if (iRet < 1) {
     return NULL;
   }
   if (resoveNodeRS.dwFlags == XFA_RESOVENODE_RSTYPE_Nodes) {
     CXFA_Node* pNode = resoveNodeRS.nodes[0]->AsNode();
     if (pNode) {
       return (CXFA_WidgetAcc*)pNode->GetWidgetData();
     }
   }
   return NULL;
@@ skipping 385 matching lines @@
 CXFA_WidgetAcc* CXFA_WidgetAccIterator::GetCurrentWidgetAcc() {
   return NULL;
 }
 FX_BOOL CXFA_WidgetAccIterator::SetCurrentWidgetAcc(CXFA_WidgetAcc* hWidget) {
   return FALSE;
 }
 void CXFA_WidgetAccIterator::SkipTree() {
   m_ContentIterator.SkipChildrenAndMoveToNext();
   m_pCurWidgetAcc = NULL;
 }