Allow default desktop content settings to be managed via policy

chrome/browser/notifications/desktop_notification_service.cc

Index: chrome/browser/notifications/desktop_notification_service.cc
diff --git a/chrome/browser/notifications/desktop_notification_service.cc b/chrome/browser/notifications/desktop_notification_service.cc
index 42faeaf839291340bde546714d5d32b7d1c304ba..9de19f450a15bd825c16e1c88f3d7da8adb0c773 100644
--- a/chrome/browser/notifications/desktop_notification_service.cc
+++ b/chrome/browser/notifications/desktop_notification_service.cc
@@ -452,6 +452,11 @@ void DesktopNotificationService::SetDefaultContentSetting(
   // 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));