Allow default desktop content settings to be managed via policy

chrome/browser/notifications/desktop_notification_service.cc

 // Copyright (c) 2010 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/notifications/desktop_notification_service.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/metrics/histogram.h"
 #include "base/thread.h"
@@ skipping 434 matching lines @@
 
 void DesktopNotificationService::SetDefaultContentSetting(
     ContentSetting setting) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   profile_->GetPrefs()->SetInteger(
       prefs::kDesktopNotificationDefaultContentSetting,
       setting == CONTENT_SETTING_DEFAULT ?  kDefaultSetting : setting);
   // The cache is updated through the notification observer.
 }
 
+bool DesktopNotificationService::IsDefaultContentSettingManaged() const {
+  return profile_->GetPrefs()->IsManagedPreference(
+      prefs::kDesktopNotificationDefaultContentSetting);
+}
+
 void DesktopNotificationService::ResetToDefaultContentSetting() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   PrefService* prefs = profile_->GetPrefs();
   prefs->ClearPref(prefs::kDesktopNotificationDefaultContentSetting);
 }
 
 std::vector<GURL> DesktopNotificationService::GetAllowedOrigins() {
   std::vector<GURL> allowed_origins;
   PrefService* prefs = profile_->GetPrefs();
@@ skipping 159 matching lines @@
   }
   return UTF8ToUTF16(origin.host());
 }
 
 void DesktopNotificationService::NotifySettingsChange() {
   NotificationService::current()->Notify(
       NotificationType::DESKTOP_NOTIFICATION_SETTINGS_CHANGED,
       Source<DesktopNotificationService>(this),
       NotificationService::NoDetails());
 }