First step for fixing Issue 9416.

tests/isolate/spawn_uri_nested_child2_vm_isolate.dart

Index: tests/isolate/spawn_uri_nested_child2_vm_isolate.dart
===================================================================
--- tests/isolate/spawn_uri_nested_child2_vm_isolate.dart	(revision 0)
+++ tests/isolate/spawn_uri_nested_child2_vm_isolate.dart	(revision 0)
@@ -0,0 +1,11 @@
+// Copyright (c) 2012, 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.
+
+// Child isolate code to be spawned from a URI to this file.
+library NestedSpawnUriChild2Library;
+import 'dart:isolate';
+
+void main() {
+  port.receive((msg, reply) => reply.send('re: $msg'));
+}