Add device policy to disallow shutdown - ash UI modifications

chrome/browser/ui/ash/system_tray_delegate_common.cc

 // Copyright 2014 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/system_tray_delegate_common.h"
 
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_notifier.h"
@@ skipping 249 matching lines @@
 }
 
 void SystemTrayDelegateCommon::AddCustodianInfoTrayObserver(
     ash::CustodianInfoTrayObserver* observer) {
 }
 
 void SystemTrayDelegateCommon::RemoveCustodianInfoTrayObserver(
     ash::CustodianInfoTrayObserver* observer) {
 }
 
+void SystemTrayDelegateCommon::AddShutdownPolicyObserver(
+    ash::ShutdownPolicyObserver* observer) {
+}
+
+void SystemTrayDelegateCommon::ShouldRebootOnShutdown(
+    const ash::RebootOnShutdownCallback& callback) {
+}
+
+void SystemTrayDelegateCommon::RemoveShutdownPolicyObserver(
+    ash::ShutdownPolicyObserver* observer) {
+}
+
 ash::SystemTrayNotifier* SystemTrayDelegateCommon::GetSystemTrayNotifier() {
   return ash::Shell::GetInstance()->system_tray_notifier();
 }
 
 void SystemTrayDelegateCommon::UpdateClockType() {
   clock_type_ = (base::GetHourClockType() == base::k24HourClock)
                     ? base::k24HourClock
                     : base::k12HourClock;
   GetSystemTrayNotifier()->NotifyDateFormatChanged();
 }
 
 void SystemTrayDelegateCommon::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   if (type == chrome::NOTIFICATION_UPGRADE_RECOMMENDED) {
     ash::UpdateInfo info;
     GetUpdateInfo(content::Source<UpgradeDetector>(source).ptr(), &info);
     GetSystemTrayNotifier()->NotifyUpdateRecommended(info);
   } else {
     NOTREACHED();
   }
 }