Rename IFWL classes which do not have CFWL equivalents

xfa/fwl/core/ifwl_combolist.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_IFWL_COMBOLIST_H_
-#define XFA_FWL_CORE_IFWL_COMBOLIST_H_
-
-#include <memory>
-
-#include "xfa/fwl/core/cfwl_widgetproperties.h"
-#include "xfa/fwl/core/ifwl_listbox.h"
-#include "xfa/fwl/core/ifwl_widget.h"
-
-class IFWL_ComboList : public IFWL_ListBox {
- public:
-  IFWL_ComboList(const CFWL_App* app,
-                 std::unique_ptr<CFWL_WidgetProperties> properties,
-                 IFWL_Widget* pOuter);
-
-  // IFWL_ListBox.
-  void OnProcessMessage(CFWL_Message* pMessage) override;
-
-  int32_t MatchItem(const CFX_WideString& wsMatch);
-
-  void ChangeSelected(int32_t iSel);
-
-  void SetNotifyOwner(bool notify) { m_bNotifyOwner = notify; }
-
- private:
-  void ClientToOuter(FX_FLOAT& fx, FX_FLOAT& fy);
-  void OnDropListFocusChanged(CFWL_Message* pMsg, bool bSet);
-  void OnDropListMouseMove(CFWL_MsgMouse* pMsg);
-  void OnDropListLButtonDown(CFWL_MsgMouse* pMsg);
-  void OnDropListLButtonUp(CFWL_MsgMouse* pMsg);
-  bool OnDropListKey(CFWL_MsgKey* pKey);
-  void OnDropListKeyDown(CFWL_MsgKey* pKey);
-
-  bool m_bNotifyOwner;
-};
-
-#endif  // XFA_FWL_CORE_IFWL_COMBOLIST_H_