Optional binary payloads in VM service events.

runtime/bin/vmservice/observatory/test/gc_test.dart

Index: runtime/bin/vmservice/observatory/test/gc_test.dart
===================================================================
--- runtime/bin/vmservice/observatory/test/gc_test.dart	(revision 39216)
+++ runtime/bin/vmservice/observatory/test/gc_test.dart	(working copy)
@@ -1,3 +1,7 @@
+// Copyright (c) 2014, 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.
+
 import 'package:observatory/service_io.dart';
 import 'test_helper.dart';