IFWL cleanup in the Combo classes

xfa/fwl/core/ifwl_comboedit.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_FWL_CORE_IFWL_COMBOEDIT_H_
 #define XFA_FWL_CORE_IFWL_COMBOEDIT_H_
 
 #include "xfa/fwl/core/cfwl_widgetproperties.h"
 #include "xfa/fwl/core/ifwl_edit.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
 class IFWL_ComboBox;
 
 class IFWL_ComboEdit : public IFWL_Edit {
  public:
   IFWL_ComboEdit(const IFWL_App* app,
                  std::unique_ptr<CFWL_WidgetProperties> properties,
                  IFWL_Widget* pOuter);
 
   // IFWL_Edit.
   void OnProcessMessage(CFWL_Message* pMessage) override;
 
   void ClearSelected();
   void SetSelected();
-  void EndCaret();
   void FlagFocus(bool bSet);
 
- protected:
-  void SetComboBoxFocus(bool bSet);
+ private:
   IFWL_ComboBox* m_pOuter;
 };
 
 #endif  // XFA_FWL_CORE_IFWL_COMBOEDIT_H_