Revert of Introduce SessionManager that will contain code to start user session on Chrome OS

chrome/browser/ui/webui/chromeos/login/reset_screen_handler.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/ui/webui/chromeos/login/reset_screen_handler.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
-#include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/login/help_app_launcher.h"
 #include "chrome/browser/chromeos/reset/metrics.h"
 #include "chrome/browser/ui/webui/chromeos/login/oobe_ui.h"
 #include "chrome/common/pref_names.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/power_manager_client.h"
@@ skipping 189 matching lines @@
                 IDS_SHORT_PRODUCT_NAME);
 }
 
 // Invoked from call to CanRollbackCheck upon completion of the DBus call.
 void ResetScreenHandler::OnRollbackCheck(bool can_rollback) {
   VLOG(1) << "Callback from CanRollbackCheck, result " << can_rollback;
   rollback_available_ = can_rollback;
   ShowWithParams();
 }
 
-// static
-void ResetScreenHandler::RegisterPrefs(PrefRegistrySimple* registry) {
-  registry->RegisterBooleanPref(prefs::kFactoryResetRequested, false);
-  registry->RegisterBooleanPref(prefs::kRollbackRequested, false);
-}
-
 void ResetScreenHandler::Initialize() {
   if (!page_is_ready() || !delegate_)
     return;
 
   if (show_on_init_) {
     Show();
     show_on_init_ = false;
   }
 }
 
@@ skipping 54 matching lines @@
     base::DictionaryValue params;
     params.SetInteger("uiState", kErrorUIStateRollback);
     ShowScreen(OobeUI::kScreenErrorMessage, &params);
   } else if (status.status ==
       UpdateEngineClient::UPDATE_STATUS_UPDATED_NEED_REBOOT) {
     DBusThreadManager::Get()->GetPowerManagerClient()->RequestRestart();
   }
 }
 
 }  // namespace chromeos