Make down-conversion explicit from CFX_Widetring to CFX_WideStringC.

xfa/fxfa/app/xfa_ffwidgetacc.cpp

Index: xfa/fxfa/app/xfa_ffwidgetacc.cpp
diff --git a/xfa/fxfa/app/xfa_ffwidgetacc.cpp b/xfa/fxfa/app/xfa_ffwidgetacc.cpp
index 271f9261f0faa706560f765b521f35ca5ddf21aa..fb2b0c3ffd596957b289a079d16e4e5875fd7c1c 100644
--- a/xfa/fxfa/app/xfa_ffwidgetacc.cpp
+++ b/xfa/fxfa/app/xfa_ffwidgetacc.cpp
@@ -229,7 +229,8 @@ void CXFA_WidgetAcc::ResetData() {
         image.GetContentType(wsContentType);
         image.GetHref(wsHref);
       }
-      SetImageEdit(wsContentType, wsHref, wsValue);
+      SetImageEdit(wsContentType.AsWideStringC(), wsHref.AsWideStringC(),
+                   wsValue.AsWideStringC());
     } break;
     case XFA_ELEMENT_ExclGroup: {
       CXFA_Node* pNextChild = m_pNode->GetNodeItem(
@@ -411,11 +412,13 @@ void CXFA_WidgetAcc::ProcessScriptTestValidate(CXFA_Validate validate,
           GetValidateMessage(pAppProvider, wsScriptMsg, FALSE, bVersionFlag);
         }
         if (bVersionFlag) {
-          pAppProvider->MsgBox(wsScriptMsg, wsTitle, XFA_MBICON_Warning,
+          pAppProvider->MsgBox(wsScriptMsg.AsWideStringC(),
+                               wsTitle.AsWideStringC(), XFA_MBICON_Warning,
                                XFA_MB_OK);
           return;
         }
-        if (pAppProvider->MsgBox(wsScriptMsg, wsTitle, XFA_MBICON_Warning,
+        if (pAppProvider->MsgBox(wsScriptMsg.AsWideStringC(),
+                                 wsTitle.AsWideStringC(), XFA_MBICON_Warning,
                                  XFA_MB_YesNo) == XFA_IDYes) {
           GetNode()->SetFlag(XFA_NODEFLAG_UserInteractive, TRUE, FALSE);
         }
@@ -423,7 +426,9 @@ void CXFA_WidgetAcc::ProcessScriptTestValidate(CXFA_Validate validate,
         if (wsScriptMsg.IsEmpty()) {
           GetValidateMessage(pAppProvider, wsScriptMsg, TRUE, bVersionFlag);
         }
-        pAppProvider->MsgBox(wsScriptMsg, wsTitle, XFA_MBICON_Error, XFA_MB_OK);
+        pAppProvider->MsgBox(wsScriptMsg.AsWideStringC(),
+                             wsTitle.AsWideStringC(), XFA_MBICON_Error,
+                             XFA_MB_OK);
       }
     }
   }
@@ -456,7 +461,9 @@ int32_t CXFA_WidgetAcc::ProcessFormatTestValidate(CXFA_Validate validate,
         if (wsFormatMsg.IsEmpty()) {
           GetValidateMessage(pAppProvider, wsFormatMsg, TRUE, bVersionFlag);
         }
-        pAppProvider->MsgBox(wsFormatMsg, wsTitle, XFA_MBICON_Error, XFA_MB_OK);
+        pAppProvider->MsgBox(wsFormatMsg.AsWideStringC(),
+                             wsTitle.AsWideStringC(), XFA_MBICON_Error,
+                             XFA_MB_OK);
         return XFA_EVENTERROR_Success;
       }
       if (GetNode()->HasFlag(XFA_NODEFLAG_UserInteractive)) {
@@ -466,11 +473,13 @@ int32_t CXFA_WidgetAcc::ProcessFormatTestValidate(CXFA_Validate validate,
         GetValidateMessage(pAppProvider, wsFormatMsg, FALSE, bVersionFlag);
       }
       if (bVersionFlag) {
-        pAppProvider->MsgBox(wsFormatMsg, wsTitle, XFA_MBICON_Warning,
+        pAppProvider->MsgBox(wsFormatMsg.AsWideStringC(),
+                             wsTitle.AsWideStringC(), XFA_MBICON_Warning,
                              XFA_MB_OK);
         return XFA_EVENTERROR_Success;
       }
-      if (pAppProvider->MsgBox(wsFormatMsg, wsTitle, XFA_MBICON_Warning,
+      if (pAppProvider->MsgBox(wsFormatMsg.AsWideStringC(),
+                               wsTitle.AsWideStringC(), XFA_MBICON_Warning,
                                XFA_MB_YesNo) == XFA_IDYes) {
         GetNode()->SetFlag(XFA_NODEFLAG_UserInteractive, TRUE, FALSE);
       }
@@ -526,7 +535,8 @@ int32_t CXFA_WidgetAcc::ProcessNullTestValidate(CXFA_Validate validate,
         pAppProvider->LoadString(XFA_IDS_ValidateNullError, wsError);
         wsNullMsg.Format(wsError, (const FX_WCHAR*)wsCaptionName);
       }
-      pAppProvider->MsgBox(wsNullMsg, wsTitle, XFA_MBICON_Status, XFA_MB_OK);
+      pAppProvider->MsgBox(wsNullMsg.AsWideStringC(), wsTitle.AsWideStringC(),
+                           XFA_MBICON_Status, XFA_MB_OK);
       return XFA_EVENTERROR_Error;
     }
     case XFA_ATTRIBUTEENUM_Warning: {
@@ -540,7 +550,8 @@ int32_t CXFA_WidgetAcc::ProcessNullTestValidate(CXFA_Validate validate,
         wsNullMsg.Format(wsWarning, (const FX_WCHAR*)wsCaptionName,
                          (const FX_WCHAR*)wsCaptionName);
       }
-      if (pAppProvider->MsgBox(wsNullMsg, wsTitle, XFA_MBICON_Warning,
+      if (pAppProvider->MsgBox(wsNullMsg.AsWideStringC(),
+                               wsTitle.AsWideStringC(), XFA_MBICON_Warning,
                                XFA_MB_YesNo) == XFA_IDYes) {
         GetNode()->SetFlag(XFA_NODEFLAG_UserInteractive, TRUE, FALSE);
       }
@@ -671,8 +682,9 @@ int32_t CXFA_WidgetAcc::ExecuteScript(CXFA_Script script,
   }
   FXJSE_HVALUE hRetValue = FXJSE_Value_Create(pContext->GetRuntime());
   ++m_nRecursionDepth;
-  FX_BOOL bRet = pContext->RunScript((XFA_SCRIPTLANGTYPE)eScriptType,
-                                     wsExpression, hRetValue, m_pNode);
+  FX_BOOL bRet =
+      pContext->RunScript((XFA_SCRIPTLANGTYPE)eScriptType,
+                          wsExpression.AsWideStringC(), hRetValue, m_pNode);
   --m_nRecursionDepth;
   int32_t iRet = XFA_EVENTERROR_Error;
   if (bRet) {
@@ -1700,11 +1712,12 @@ FX_BOOL CXFA_TextProvider::GetEmbbedObj(FX_BOOL bURI,
     CXFA_Node* pIDNode = NULL;
     CXFA_WidgetAcc* pEmbAcc = NULL;
     if (pParent) {
-      pIDNode = pDocument->GetNodeByID(pParent, wsAttr);
+      pIDNode = pDocument->GetNodeByID(pParent, wsAttr.AsWideStringC());
     }
     if (!pIDNode) {
       pIDNode = pDocument->GetNodeByID(
-          ToNode(pDocument->GetXFAObject(XFA_HASHCODE_Form)), wsAttr);
+          ToNode(pDocument->GetXFAObject(XFA_HASHCODE_Form)),
+          wsAttr.AsWideStringC());
     }
     if (pIDNode) {
       pEmbAcc = (CXFA_WidgetAcc*)pIDNode->GetWidgetData();