Remove DataProvider from CFWL_WidgetProperties

xfa/fwl/core/cfwl_listbox.h

 // 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
 
 #ifndef XFA_FWL_CORE_CFWL_LISTBOX_H_
 #define XFA_FWL_CORE_CFWL_LISTBOX_H_
 
 #include <memory>
 #include <vector>
 
+#include "xfa/fwl/core/cfwl_listitem.h"
 #include "xfa/fwl/core/cfwl_widget.h"
 #include "xfa/fwl/core/fwl_error.h"
-#include "xfa/fwl/core/ifwl_listbox.h"
-#include "xfa/fwl/core/ifwl_widget.h"
 
-class CFWL_ListBox : public CFWL_Widget, public IFWL_ListBox::DataProvider {
+class CFWL_ListBox : public CFWL_Widget {
  public:
   explicit CFWL_ListBox(const CFWL_App* pApp);
   ~CFWL_ListBox() override;
 
   void Initialize();
 
   CFWL_ListItem* GetItem(const IFWL_Widget* pWidget, int32_t nIndex) const;
   void GetItemText(IFWL_Widget* pWidget,
                    CFWL_ListItem* pItem,
                    CFX_WideString& wsText);
 
   CFWL_ListItem* AddString(const CFX_WideStringC& wsAdd, bool bSelect = false);
   bool DeleteString(CFWL_ListItem* pItem);
   void DeleteAll();
   int32_t CountSelItems();
   void SetSelItem(CFWL_ListItem* pItem, bool bSelect = true);
   CFWL_ListItem* GetSelItem(int32_t nIndexSel);
   int32_t GetSelIndex(int32_t nIndex);
 
   uint32_t GetItemStates(CFWL_ListItem* pItem);
 };
 
 #endif  // XFA_FWL_CORE_CFWL_LISTBOX_H_