Sends Updated when message center is closed.

ui/message_center/message_center_impl.cc

Index: ui/message_center/message_center_impl.cc
diff --git a/ui/message_center/message_center_impl.cc b/ui/message_center/message_center_impl.cc
index bc3a6d28742925b6faca49745e589bb0575897b1..3405aa7ef497592d73856f61cccd319520c3d89d 100644
--- a/ui/message_center/message_center_impl.cc
+++ b/ui/message_center/message_center_impl.cc
@@ -34,7 +34,13 @@ void MessageCenterImpl::SetDelegate(Delegate* delegate) {
 }
 
 void MessageCenterImpl::SetMessageCenterVisible(bool visible) {
-  notification_list_->SetMessageCenterVisible(visible);
+  std::set<std::string> updated_ids;
+  notification_list_->SetMessageCenterVisible(visible, &updated_ids);
+  for (std::set<std::string>::const_iterator iter = updated_ids.begin();
+       iter != updated_ids.end(); ++iter) {
+    FOR_EACH_OBSERVER(MessageCenterObserver, observer_list_,
+                      OnNotificationUpdated(*iter));
+  }
 }
 
 size_t MessageCenterImpl::NotificationCount() const {