mash: Convert system tray logout button to wm common types

ash/system/chromeos/session/logout_confirmation_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_SYSTEM_CHROMEOS_SESSION_LOGOUT_CONFIRMATION_CONTROLLER_H_
-#define ASH_SYSTEM_CHROMEOS_SESSION_LOGOUT_CONFIRMATION_CONTROLLER_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "ash/common/shell_observer.h"
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-
-namespace base {
-class TickClock;
-}
-
-namespace ash {
-
-class LogoutConfirmationDialog;
-
-// This class shows a dialog asking the user to confirm or deny logout and
-// terminates the session if the user either confirms or allows the countdown
-// shown in the dialog to expire.
-// It is guaranteed that no more than one confirmation dialog will be visible at
-// any given time. If there are multiple requests to show a confirmation dialog
-// at the same time, the dialog whose countdown expires first is shown.
-class ASH_EXPORT LogoutConfirmationController : public ShellObserver {
- public:
-  // The |logout_closure| must be safe to call as long as |this| is alive.
-  explicit LogoutConfirmationController(const base::Closure& logout_closure);
-  ~LogoutConfirmationController() override;
-
-  base::TickClock* clock() const { return clock_.get(); }
-
-  // Shows a LogoutConfirmationDialog. If a confirmation dialog is already being
-  // shown, it is closed and a new one opened if |logout_time| is earlier than
-  // the current dialog's |logout_time_|.
-  void ConfirmLogout(base::TimeTicks logout_time);
-
-  void SetClockForTesting(std::unique_ptr<base::TickClock> clock);
-
-  // ShellObserver:
-  void OnLockStateChanged(bool locked) override;
-
-  // Called by the |dialog_| when the user confirms logout.
-  void OnLogoutConfirmed();
-
-  // Called by the |dialog_| when it is closed.
-  void OnDialogClosed();
-
-  LogoutConfirmationDialog* dialog_for_testing() const { return dialog_; }
-
- private:
-  std::unique_ptr<base::TickClock> clock_;
-  base::Closure logout_closure_;
-
-  base::TimeTicks logout_time_;
-  LogoutConfirmationDialog* dialog_;  // Owned by the Views hierarchy.
-  base::Timer logout_timer_;
-
-  DISALLOW_COPY_AND_ASSIGN(LogoutConfirmationController);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_CHROMEOS_SESSION_LOGOUT_CONFIRMATION_CONTROLLER_H_