chromeos: Add DisplayPowerServiceProvider.

chrome/browser/chromeos/power/resume_observer.cc

 // 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.
 
 #include "chrome/browser/chromeos/power/resume_observer.h"
 
+#include "ash/shell.h"
 #include "chrome/browser/extensions/api/system_private/system_private_api.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/display/output_configurator.h"
 
 namespace chromeos {
 
 ResumeObserver::ResumeObserver() {
   DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
 }
 
 ResumeObserver::~ResumeObserver() {
   DBusThreadManager::Get()->GetPowerManagerClient()->RemoveObserver(this);
 }
 
 void ResumeObserver::SystemResumed(const base::TimeDelta& sleep_duration) {
   extensions::DispatchWokeUpEvent();
+  ash::Shell::GetInstance()->output_configurator()->ResumeDisplays();
 }
 
 }  // namespace chromeos