Make CFX_WideString(const CFX_WideString&) explicit.

xfa/fxfa/parser/cxfa_widgetdata.h

 // Copyright 2016 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
 
 #ifndef XFA_FXFA_PARSER_CXFA_WIDGETDATA_H_
 #define XFA_FXFA_PARSER_CXFA_WIDGETDATA_H_
 
 #include "core/fxcrt/include/fx_string.h"
@@ skipping 150 matching lines @@
   CFX_WideString NumericLimit(const CFX_WideString& wsValue,
                               int32_t iLead,
                               int32_t iTread) const;
 
   FX_BOOL m_bIsNull;
   FX_BOOL m_bPreNull;
 
  protected:
   void SyncValue(const CFX_WideString& wsValue, FX_BOOL bNotify);
   void InsertListTextItem(CXFA_Node* pItems,
-                          const CFX_WideStringC& wsText,
+                          const CFX_WideString& wsText,
                           int32_t nIndex = -1);
   void FormatNumStr(const CFX_WideString& wsValue,
                     IFX_Locale* pLocale,
                     CFX_WideString& wsOutput);
 
   CXFA_Node* m_pUiChildNode;
   XFA_ELEMENT m_eUIType;
 };
 
 #endif  // XFA_FXFA_PARSER_CXFA_WIDGETDATA_H_