chromeos: More power-related cleanup.

ash/system/chromeos/power/suspend_observer.h

-// Copyright 2013 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_POWER_SUSPEND_OBSERVER_H_
-#define ASH_SYSTEM_CHROMEOS_POWER_SUSPEND_OBSERVER_H_
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "base/compiler_specific.h"
-#include "chromeos/dbus/power_manager_client.h"
-#include "chromeos/dbus/session_manager_client.h"
-
-namespace ash {
-namespace internal {
-
-// A class to observe suspend events.
-class SuspendObserver : public chromeos::PowerManagerClient::Observer,
-                        public chromeos::SessionManagerClient::Observer {
- public:
-  // This class registers/unregisters itself as an observer in ctor/dtor.
-  SuspendObserver();
-  virtual ~SuspendObserver();
-
-  // chromeos::PowerManagerClient::Observer override.
-  virtual void SuspendImminent() OVERRIDE;
-
-  // chromeos::SessionManagerClient::Observer overrides.
-  virtual void ScreenIsLocked() OVERRIDE;
-  virtual void ScreenIsUnlocked() OVERRIDE;
-
- private:
-  chromeos::PowerManagerClient* power_client_;  // not owned
-  chromeos::SessionManagerClient* session_client_;  // not owned
-
-  // Is the screen currently locked?
-  bool screen_locked_;
-
-  // If set, called when the lock screen has been shown to confirm that the
-  // system is ready to be suspended.
-  base::Closure screen_lock_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(SuspendObserver);
-};
-
-}  // namespace internal
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_CHROMEOS_POWER_SUSPEND_OBSERVER_H_