mash: Migrate remaining tray observers and notify functions.

ash/virtual_keyboard_controller.h

 // Copyright 2014 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_VIRTUAL_KEYBOARD_CONTROLLER_H_
 #define ASH_VIRTUAL_KEYBOARD_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/shell_observer.h"
-#include "ash/system/tray/system_tray_notifier.h"
 #include "base/macros.h"
 #include "ui/events/devices/input_device_event_observer.h"
 
 namespace ash {
 
 // This class observes input device changes for the virtual keyboard.
 class ASH_EXPORT VirtualKeyboardController
     : public ShellObserver,
       public ui::InputDeviceEventObserver {
  public:
@@ skipping 31 matching lines @@
   bool has_touchscreen_;
   // True if the presense of an external keyboard should be ignored.
   bool ignore_external_keyboard_;
 
   DISALLOW_COPY_AND_ASSIGN(VirtualKeyboardController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_VIRTUAL_KEYBOARD_CONTROLLER_H_