Revert 162140 - ash : Decouple power button controller and session state controller.

chrome/browser/chromeos/power/session_state_controller_delegate_chromeos.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/session_state_controller_delegate_chromeos.h"
-
-#include "base/logging.h"
-#include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.h"
-#include "chrome/browser/lifetime/application_lifetime.h"
-#include "chromeos/dbus/dbus_thread_manager.h"
-#include "chromeos/dbus/power_manager_client.h"
-#include "chromeos/dbus/session_manager_client.h"
-
-namespace chromeos {
-
-void SessionStateControllerDelegateChromeos::RequestLockScreen() {
-  // If KioskMode is enabled, if the user attempts to lock the screen via
-  // the power button, we instead want to log the user out. This seemed to
-  // be the most acceptable replacement for the lock action of the power
-  // button for Kiosk mode users.
-  if (KioskModeSettings::Get()->IsKioskModeEnabled()) {
-    browser::AttemptUserExit();
-    return;
-  }
-
-  DBusThreadManager::Get()->GetSessionManagerClient()->RequestLockScreen();
-}
-
-void SessionStateControllerDelegateChromeos::RequestShutdown() {
-  DBusThreadManager::Get()->GetPowerManagerClient()->RequestShutdown();
-}
-
-}  // namespace chromeos