chromeos: More power-related cleanup.

chrome/browser/chromeos/power/screen_lock_observer.h

-// Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_POWER_SCREEN_LOCK_OBSERVER_H_
-#define CHROME_BROWSER_CHROMEOS_POWER_SCREEN_LOCK_OBSERVER_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "chromeos/dbus/session_manager_client.h"
-
-namespace chromeos {
-
-// A class to observe screen lock events and dispatch onScreenUnlocked extension
-// API events.
-class ScreenLockObserver : public SessionManagerClient::Observer {
- public:
-  // This class registers/unregisters itself as an observer in ctor/dtor.
-  ScreenLockObserver();
-  virtual ~ScreenLockObserver();
-
-  // SessionManagerClient::Observer override.
-  virtual void ScreenIsUnlocked() OVERRIDE;
- private:
-  DISALLOW_COPY_AND_ASSIGN(ScreenLockObserver);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_POWER_SCREEN_LOCK_OBSERVER_H_