Revert "chromeos: Move files in //ash/common to //ash, part 1"

ash/system/media_security/multi_profile_media_tray_item.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_SYSTEM_MEDIA_SECURITY_MULTI_PROFILE_MEDIA_TRAY_ITEM_H_
-#define ASH_SYSTEM_MEDIA_SECURITY_MULTI_PROFILE_MEDIA_TRAY_ITEM_H_
-
-#include "ash/system/tray/system_tray_item.h"
-#include "base/macros.h"
-
-namespace ash {
-
-// The tray item for media recording.
-class ASH_EXPORT MultiProfileMediaTrayItem : public SystemTrayItem {
- public:
-  explicit MultiProfileMediaTrayItem(SystemTray* system_tray);
-  ~MultiProfileMediaTrayItem() override;
-
-  // SystemTrayItem:
-  views::View* CreateTrayView(LoginStatus status) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MultiProfileMediaTrayItem);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_MEDIA_SECURITY_MULTI_PROFILE_MEDIA_TRAY_ITEM_H_