Converted Observatory isolate-nav-menu element

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

Index: runtime/observatory/lib/src/mocks/objects/event.dart
diff --git a/runtime/observatory/lib/src/mocks/objects/event.dart b/runtime/observatory/lib/src/mocks/objects/event.dart
new file mode 100644
index 0000000000000000000000000000000000000000..bcbb35d16b5c209c76376726f6c999b8f3ce5077
--- /dev/null
+++ b/runtime/observatory/lib/src/mocks/objects/event.dart
@@ -0,0 +1,11 @@
+// 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 IsolateUpdateEventMock implements M.IsolateUpdateEvent {
+  final DateTime timestamp;
+  final M.IsolateRef isolate;
+  const IsolateUpdateEventMock({this.timestamp, this.isolate});
+}