chromeos: Move system resume handling to power manager client

chrome/browser/chromeos/accessibility/system_event_observer.cc

 // Copyright (c) 2011 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/accessibility/system_event_observer.h"
 
 #include "base/logging.h"
 #include "chrome/browser/accessibility_events.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
+#include "chrome/browser/chromeos/dbus/dbus_thread_manager.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_notification_types.h"
 
 namespace chromeos {
 namespace accessibility {
 
 namespace {
 
 SystemEventObserver* g_system_event_observer = NULL;
 
 }
 
 SystemEventObserver::SystemEventObserver() {
-  CrosLibrary::Get()->GetPowerLibrary()->AddObserver(this);
   CrosLibrary::Get()->GetScreenLockLibrary()->AddObserver(this);
 }
 
 SystemEventObserver::~SystemEventObserver() {
   CrosLibrary::Get()->GetScreenLockLibrary()->RemoveObserver(this);
-  CrosLibrary::Get()->GetPowerLibrary()->RemoveObserver(this);
 }
 
 void SystemEventObserver::SystemResumed() {
   Profile* profile = ProfileManager::GetDefaultProfile();
   WokeUpEventInfo info(profile);
   SendAccessibilityNotification(
       chrome::NOTIFICATION_ACCESSIBILITY_WOKE_UP, &info);
 }
 
 void SystemEventObserver::LockScreen(ScreenLockLibrary* screen_lock_library) {
 }
 
 void SystemEventObserver::UnlockScreen(ScreenLockLibrary* screen_lock_library) {
   Profile* profile = ProfileManager::GetDefaultProfile();
   ScreenUnlockedEventInfo info(profile);
   SendAccessibilityNotification(
       chrome::NOTIFICATION_ACCESSIBILITY_SCREEN_UNLOCKED, &info);
 }
 
 void SystemEventObserver::UnlockScreenFailed(
     ScreenLockLibrary* screen_lock_library) {
 }
 
 // static
 void SystemEventObserver::Initialize() {
   DCHECK(!g_system_event_observer);
   g_system_event_observer = new SystemEventObserver();
   VLOG(1) << "SystemEventObserver initialized";
+  DBusThreadManager::Get()->GetPowerManagerClient()->
+      AddObserver(g_system_event_observer);
 }
 
 // static
 SystemEventObserver* SystemEventObserver::GetInstance() {
   return g_system_event_observer;
 }
 
 // static
 void SystemEventObserver::Shutdown() {
   DCHECK(g_system_event_observer);
+  DBusThreadManager::Get()->GetPowerManagerClient()->
+      RemoveObserver(g_system_event_observer);
   delete g_system_event_observer;
   g_system_event_observer = NULL;
   VLOG(1) << "SystemEventObserver Shutdown completed";
 }
 
 }  // namespace accessibility
 }  // namespace chromeos