Make CFX_WideString::FromUTF8() take a CFX_ByteStringC argument.

xfa/fxfa/app/xfa_ffwidgetacc.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_ffwidgetacc.h"
 
 #include <algorithm>
 
@@ skipping 678 matching lines @@
   int32_t iRet = XFA_EVENTERROR_Error;
   if (bRet) {
     iRet = XFA_EVENTERROR_Success;
     if (pEventParam->m_eType == XFA_EVENT_Calculate ||
         pEventParam->m_eType == XFA_EVENT_InitCalculate) {
       if (!FXJSE_Value_IsUndefined(hRetValue)) {
         if (!FXJSE_Value_IsNull(hRetValue)) {
           CFX_ByteString bsString;
           FXJSE_Value_ToUTF8String(hRetValue, bsString);
           pEventParam->m_wsResult =
-              CFX_WideString::FromUTF8(bsString, bsString.GetLength());
+              CFX_WideString::FromUTF8(bsString.AsByteStringC());
         }
         iRet = XFA_EVENTERROR_Success;
       } else {
         iRet = XFA_EVENTERROR_Error;
       }
       if (pEventParam->m_eType == XFA_EVENT_InitCalculate) {
         if ((iRet == XFA_EVENTERROR_Success) &&
             (GetRawValue() != pEventParam->m_wsResult)) {
           SetValue(pEventParam->m_wsResult, XFA_VALUEPICTURE_Raw);
           m_pDocView->AddValidateWidget(this);
@@ skipping 1012 matching lines @@
     if (pIDNode) {
       pEmbAcc = (CXFA_WidgetAcc*)pIDNode->GetWidgetData();
     }
     if (pEmbAcc) {
       pEmbAcc->GetValue(wsValue, XFA_VALUEPICTURE_Display);
       return TRUE;
     }
   }
   return FALSE;
 }