Revert of Make TrayDetailsView a ViewClickListener and ButtonListener

ash/common/system/chromeos/ime_menu/ime_list_view.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_COMMON_SYSTEM_CHROMEOS_IME_MENU_IME_LIST_VIEW_H_
 #define ASH_COMMON_SYSTEM_CHROMEOS_IME_MENU_IME_LIST_VIEW_H_
 
 #include "ash/common/system/tray/ime_info.h"
 #include "ash/common/system/tray/tray_details_view.h"
+#include "ash/common/system/tray/view_click_listener.h"
 
 namespace ash {
 // The detailed view for showing IME list.
-class ImeListView : public TrayDetailsView {
+class ImeListView : public TrayDetailsView, public ViewClickListener {
  public:
   enum SingleImeBehavior {
     // Shows the IME menu if there's only one IME in system.
     SHOW_SINGLE_IME,
     // Hides the IME menu if there's only one IME in system.
     HIDE_SINGLE_IME
   };
 
   ImeListView(SystemTrayItem* owner,
               bool show_keyboard_toggle,
               SingleImeBehavior single_ime_behavior);
 
   ~ImeListView() override;
 
   // Updates the view.
   virtual void Update(const IMEInfoList& list,
                       const IMEPropertyInfoList& property_list,
                       bool show_keyboard_toggle,
                       SingleImeBehavior single_ime_behavior);
 
  protected:
-  // TrayDetailsView:
-  void HandleViewClicked(views::View* view) override;
+  // ViewClickListener:
+  void OnViewClicked(views::View* sender) override;
 
  private:
   // To allow the test class to access |ime_map_|.
   friend class ImeMenuTrayTest;
 
   // Appends the IMEs to the scrollable area of the detailed view.
   void AppendIMEList(const IMEInfoList& list);
 
   // Appends the IME listed to the scrollable area of the detailed view.
   void AppendIMEProperties(const IMEPropertyInfoList& property_list);
 
   // Appends the on-screen keyboard status to the last area of the detailed
   // view.
   void AppendKeyboardStatus();
 
   std::map<views::View*, std::string> ime_map_;
   std::map<views::View*, std::string> property_map_;
   views::View* keyboard_status_;
 
   DISALLOW_COPY_AND_ASSIGN(ImeListView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_CHROMEOS_IME_MENU_IME_LIST_VIEW_H_