Allow default desktop content settings to be managed via policy

chrome/browser/gtk/options/content_filter_page_gtk.cc

Index: chrome/browser/gtk/options/content_filter_page_gtk.cc
diff --git a/chrome/browser/gtk/options/content_filter_page_gtk.cc b/chrome/browser/gtk/options/content_filter_page_gtk.cc
index 21387a591a77e43c26820e44ee084735edb7c111..370764de97a5569e8de8f2d5545b3fe7cbd0875b 100644
--- a/chrome/browser/gtk/options/content_filter_page_gtk.cc
+++ b/chrome/browser/gtk/options/content_filter_page_gtk.cc
@@ -156,6 +156,8 @@ GtkWidget* ContentFilterPageGtk::InitGroup() {
   // aften content settings change.
   registrar_.Add(this, NotificationType::CONTENT_SETTINGS_CHANGED,
                  NotificationService::AllSources());
+  registrar_.Add(this, NotificationType::DESKTOP_NOTIFICATION_DEFAULT_CHANGED,
+                 NotificationService::AllSources());
 
   return vbox;
 }
@@ -163,15 +165,22 @@ GtkWidget* ContentFilterPageGtk::InitGroup() {
 void ContentFilterPageGtk::UpdateButtonsState() {
   // Get default_setting.
   ContentSetting default_setting;
+  // If the content setting is managed, sensitive is set to false and the radio
+  // buttons will be disabled.
+  bool sensitive = true;
   if (content_type_ == CONTENT_SETTINGS_TYPE_GEOLOCATION) {
     default_setting = profile()->GetGeolocationContentSettingsMap()->
         GetDefaultContentSetting();
   } else if (content_type_ == CONTENT_SETTINGS_TYPE_NOTIFICATIONS) {
     default_setting = profile()->GetDesktopNotificationService()->
         GetDefaultContentSetting();
+    sensitive = !profile()->GetDesktopNotificationService()->
+        IsDefaultContentSettingManaged();
   } else {
     default_setting = profile()->GetHostContentSettingsMap()->
         GetDefaultContentSetting(content_type_);
+    sensitive = !profile()->GetHostContentSettingsMap()->
+        IsDefaultContentSettingManaged(content_type_);
   }
   // Set UI state.
   if (default_setting == CONTENT_SETTING_ALLOW) {
@@ -185,8 +194,6 @@ void ContentFilterPageGtk::UpdateButtonsState() {
   }
 
   // Disable the UI if the default content setting is managed.
-  bool sensitive = !profile()->GetHostContentSettingsMap()->
-      IsDefaultContentSettingManaged(content_type_);
   gtk_widget_set_sensitive(allow_radio_, sensitive);
   gtk_widget_set_sensitive(block_radio_, sensitive);
   if (ask_radio_)
@@ -279,6 +286,12 @@ void ContentFilterPageGtk::Observe(NotificationType type,
   if (type == NotificationType::CONTENT_SETTINGS_CHANGED) {
     NotifyContentSettingsChanged(
         Details<HostContentSettingsMap::ContentSettingsDetails>(details).ptr());
+  } else if (type == NotificationType::DESKTOP_NOTIFICATION_DEFAULT_CHANGED) {
+    HostContentSettingsMap::ContentSettingsDetails content_settings_details(
+        HostContentSettingsMap::Pattern(),
+        CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
+        "");
+    NotifyContentSettingsChanged(&content_settings_details);
   } else {
     OptionsPageBase::Observe(type, source, details);
   }