chromeos: Remove dead power manager code.

chrome/browser/chromeos/power/output_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/output_observer.h"
-
-#include "ash/shell.h"
-#include "ash/wm/user_activity_detector.h"
-#include "chromeos/dbus/dbus_thread_manager.h"
-#include "chromeos/display/output_configurator.h"
-
-namespace chromeos {
-
-OutputObserver::OutputObserver() {
-  DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
-}
-
-OutputObserver::~OutputObserver() {
-  DBusThreadManager::Get()->GetPowerManagerClient()->RemoveObserver(this);
-}
-
-void OutputObserver::ScreenPowerSet(bool power_on, bool all_displays) {
-  // Turning displays off when the device becomes idle or on just before we
-  // suspend may trigger a mouse move, which would then be incorrectly
-  // reported as user activity.  Let the UserActivityDetector know so that
-  // it can ignore such events.
-  ash::Shell::GetInstance()->user_activity_detector()->OnDisplayPowerChanging();
-
-  DisplayPowerState state = DISPLAY_POWER_ALL_ON;
-  if (power_on && all_displays)
-    state = DISPLAY_POWER_ALL_ON;
-  else if (power_on && !all_displays)
-    state = DISPLAY_POWER_INTERNAL_ON_EXTERNAL_OFF;
-  else if (!power_on && all_displays)
-    state = DISPLAY_POWER_ALL_OFF;
-  else if (!power_on && !all_displays)
-    state = DISPLAY_POWER_INTERNAL_OFF_EXTERNAL_ON;
-
-  ash::Shell::GetInstance()->output_configurator()->SetDisplayPower(
-      state, false);
-}
-
-}  // namespace chromeos