Post the task of disabling virtual keyboard

ash/system/ime_menu/ime_menu_tray.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_SYSTEM_IME_MENU_IME_MENU_TRAY_H_
 #define ASH_SYSTEM_IME_MENU_IME_MENU_TRAY_H_
 
 #include "ash/ash_export.h"
 #include "ash/system/ime/ime_observer.h"
 #include "ash/system/tray/ime_info.h"
@@ skipping 78 matching lines @@
  private:
   // To allow the test class to access |label_|.
   friend class ImeMenuTrayTest;
 
   // Show the IME menu bubble immediately.
   void ShowImeMenuBubbleInternal();
 
   // Updates the text of the label on the tray.
   void UpdateTrayLabel();
 
+  // Disables the virtual keyboard.
+  void DisableVirtualKeyboard();
+
   // Bubble for default and detailed views.
   std::unique_ptr<TrayBubbleWrapper> bubble_;
   ImeListView* ime_list_view_;
 
   views::Label* label_;
   IMEInfo current_ime_;
   bool show_keyboard_;
   bool force_show_keyboard_;
   bool keyboard_suppressed_;
   bool show_bubble_after_keyboard_hidden_;
 
+  base::WeakPtrFactory<ImeMenuTray> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(ImeMenuTray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_IME_MENU_IME_MENU_TRAY_H_