Converted Observatory nav-notify element

runtime/observatory/lib/src/mocks/objects/notification.dart

Index: runtime/observatory/lib/src/mocks/objects/notification.dart
diff --git a/runtime/observatory/lib/src/mocks/objects/notification.dart b/runtime/observatory/lib/src/mocks/objects/notification.dart
new file mode 100644
index 0000000000000000000000000000000000000000..68bfd75d0209115a3d43f3407926fea15f8c70a8
--- /dev/null
+++ b/runtime/observatory/lib/src/mocks/objects/notification.dart
@@ -0,0 +1,16 @@
+// 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
+
+part of mocks;
+
+class ExceptionNotificationMock implements M.ExceptionNotification {
+  final Exception exception;
+  final StackTrace stacktrace;
+  const ExceptionNotificationMock({this.exception, this.stacktrace});
+}
+
+class EventNotificationMock implements M.EventNotification {
+  final M.Event event;
+  const EventNotificationMock({this.event});
+}