Centralized event streams

runtime/observatory/lib/src/repositories/notification.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file
+// BSD-style license that can be found in the LICENSE file.
 
 part of repositories;
 
 class NotificationChangeEvent implements M.NotificationChangeEvent {
   final NotificationRepository repository;
   NotificationChangeEvent(this.repository);
 }
 
 class NotificationRepository implements M.NotificationRepository {
   final List<M.Notification> _list = new List<M.Notification>();
@@ skipping 49 matching lines @@
     }
   }
 
   void deleteDisconnectEvents() {
     deleteWhere((notification) {
       return notification is M.EventNotification &&
              notification.event is M.ConnectionClosedEvent;
     });
   }
 }