mash: Migrate some system user files to common.

ash/system/chromeos/session/logout_button_tray.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_CHROMEOS_SESSION_LOGOUT_BUTTON_TRAY_H_
 #define ASH_SYSTEM_CHROMEOS_SESSION_LOGOUT_BUTTON_TRAY_H_
 
 #include "ash/ash_export.h"
+#include "ash/common/login_status.h"
 #include "ash/common/system/tray/tray_background_view.h"
 #include "ash/system/chromeos/session/logout_button_observer.h"
-#include "ash/system/user/login_status.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "ui/views/controls/button/button.h"
 
 namespace views {
 class LabelButton;
 }
 
 namespace ash {
+
 class StatusAreaWidget;
 
 // Adds a logout button to the launcher's status area if enabled by the
 // kShowLogoutButtonInTray pref.
 class ASH_EXPORT LogoutButtonTray : public TrayBackgroundView,
                                     public LogoutButtonObserver,
                                     public views::ButtonListener {
  public:
   explicit LogoutButtonTray(StatusAreaWidget* status_area_widget);
   ~LogoutButtonTray() override;
@@ skipping 20 matching lines @@
   LoginStatus login_status_;
   bool show_logout_button_in_tray_;
   base::TimeDelta dialog_duration_;
 
   DISALLOW_COPY_AND_ASSIGN(LogoutButtonTray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_CHROMEOS_SESSION_LOGOUT_BUTTON_TRAY_H_