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

ash/common/system/chromeos/supervised/tray_supervised_user.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_COMMON_SYSTEM_CHROMEOS_SUPERVISED_TRAY_SUPERVISED_USER_H_
-#define ASH_COMMON_SYSTEM_CHROMEOS_SUPERVISED_TRAY_SUPERVISED_USER_H_
-
-#include "ash/ash_export.h"
-#include "ash/common/system/chromeos/supervised/custodian_info_tray_observer.h"
-#include "ash/common/system/tray/system_tray_item.h"
-#include "ash/common/system/tray/view_click_listener.h"
-#include "base/macros.h"
-#include "base/strings/string16.h"
-
-namespace ash {
-class LabelTrayView;
-class SystemTray;
-
-class ASH_EXPORT TraySupervisedUser : public SystemTrayItem,
-                                      public ViewClickListener,
-                                      public CustodianInfoTrayObserver {
- public:
-  explicit TraySupervisedUser(SystemTray* system_tray);
-  ~TraySupervisedUser() override;
-
-  // If message is not empty updates content of default view, otherwise hides
-  // tray items.
-  void UpdateMessage();
-
-  // Overridden from SystemTrayItem.
-  views::View* CreateDefaultView(LoginStatus status) override;
-  void DestroyDefaultView() override;
-  void UpdateAfterLoginStatusChange(LoginStatus status) override;
-
-  // Overridden from ViewClickListener.
-  void OnViewClicked(views::View* sender) override;
-
-  // Overridden from CustodianInfoTrayObserver:
-  void OnCustodianInfoChanged() override;
-
- private:
-  friend class TraySupervisedUserTest;
-
-  static const char kNotificationId[];
-
-  void CreateOrUpdateNotification(const base::string16& new_message);
-
-  void CreateOrUpdateSupervisedWarningNotification();
-
-  int GetSupervisedUserIconId() const;
-
-  LabelTrayView* tray_view_;
-
-  // Previous login status to avoid showing notification upon unlock.
-  LoginStatus status_;
-
-  // Previous user supervised state to avoid showing notification upon unlock.
-  bool is_user_supervised_;
-
-  DISALLOW_COPY_AND_ASSIGN(TraySupervisedUser);
-};
-
-}  // namespace ash
-
-#endif  // ASH_COMMON_SYSTEM_CHROMEOS_SUPERVISED_TRAY_SUPERVISED_USER_H_