cros system menu - fix back and settings buttons in IME detailed view.

ash/common/system/tray/tray_details_view.h

 // Copyright (c) 2012 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_TRAY_TRAY_DETAILS_VIEW_H_
 #define ASH_COMMON_SYSTEM_TRAY_TRAY_DETAILS_VIEW_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/system/tray/special_popup_row.h"
 #include "ash/common/system/tray/view_click_listener.h"
@@ skipping 16 matching lines @@
 class SystemTrayItem;
 
 class ASH_EXPORT TrayDetailsView : public views::View,
                                    public ViewClickListener,
                                    public views::ButtonListener {
  public:
   explicit TrayDetailsView(SystemTrayItem* owner);
   ~TrayDetailsView() override;
 
   // ViewClickListener:
-  void OnViewClicked(views::View* sender) override;
+  // Don't override this --- override HandleViewClicked.
+  void OnViewClicked(views::View* sender) final;
 
   // views::ButtonListener:
-  void ButtonPressed(views::Button* sender, const ui::Event& event) override;
+  // Don't override this --- override HandleButtonPressed.
+  void ButtonPressed(views::Button* sender, const ui::Event& event) final;
 
   SystemTrayItem* owner() { return owner_; }
   SpecialPopupRow* title_row() { return title_row_; }
   FixedSizedScrollView* scroller() { return scroller_; }
   views::View* scroll_content() { return scroll_content_; }
 
  protected:
   // views::View:
   void Layout() override;
   void OnPaintBorder(gfx::Canvas* canvas) override;
@@ skipping 46 matching lines @@
 
   // The back button that appears in the material design title row. Not owned.
   views::Button* back_button_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayDetailsView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_TRAY_DETAILS_VIEW_H_