Revert of Delete "shutdown without closing browsers" path

chrome/browser/ui/ash/chrome_shell_delegate_views.cc

 // Copyright 2013 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/ash/chrome_shell_delegate.h"
 
 #include "ash/accessibility_delegate.h"
 #include "ash/magnifier/magnifier_constants.h"
 #include "ash/media_delegate.h"
 #include "ash/system/tray/default_system_tray_delegate.h"
@@ skipping 138 matching lines @@
 
 }  // namespace
 
 bool ChromeShellDelegate::IsFirstRunAfterBoot() const {
   return false;
 }
 
 void ChromeShellDelegate::PreInit() {
 }
 
-void ChromeShellDelegate::PreShutdown() {
+void ChromeShellDelegate::Shutdown() {
 }
 
 ash::NewWindowDelegate* ChromeShellDelegate::CreateNewWindowDelegate() {
   return new NewWindowDelegateImpl;
 }
 
 ash::MediaDelegate* ChromeShellDelegate::CreateMediaDelegate() {
   return new MediaDelegateImpl;
 }
 
@@ skipping 84 matching lines @@
 void ChromeShellDelegate::PlatformInit() {
 #if defined(OS_WIN)
   registrar_.Add(this,
                  chrome::NOTIFICATION_ASH_SESSION_STARTED,
                  content::NotificationService::AllSources());
   registrar_.Add(this,
                  chrome::NOTIFICATION_ASH_SESSION_ENDED,
                  content::NotificationService::AllSources());
 #endif
 }