chromeos: More power-related cleanup.

chrome/browser/chromeos/extensions/extension_system_event_observer.cc

+// Copyright (c) 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.
+
+#include "chrome/browser/chromeos/extensions/extension_system_event_observer.h"
+
+#include "chrome/browser/extensions/api/system_private/system_private_api.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+
+namespace chromeos {
+
+ExtensionSystemEventObserver::ExtensionSystemEventObserver() {
+  DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
+  DBusThreadManager::Get()->GetSessionManagerClient()->AddObserver(this);
+}
+
+ExtensionSystemEventObserver::~ExtensionSystemEventObserver() {
+  DBusThreadManager::Get()->GetPowerManagerClient()->RemoveObserver(this);
+  DBusThreadManager::Get()->GetSessionManagerClient()->RemoveObserver(this);
+}
+
+void ExtensionSystemEventObserver::BrightnessChanged(int level,
+                                                     bool user_initiated) {
+  extensions::DispatchBrightnessChangedEvent(level, user_initiated);
+}
+
+void ExtensionSystemEventObserver::SystemResumed(
+    const base::TimeDelta& sleep_duration) {
+  extensions::DispatchWokeUpEvent();
+}
+
+void ExtensionSystemEventObserver::ScreenIsUnlocked() {
+  extensions::DispatchScreenUnlockedEvent();
+}
+
+}  // namespace chromeos