Add test_runner.dart to Dart version of test scripts. Include TestRunnerTest unit test.

tests/standalone/src/TimeoutTest.dart

Index: tests/standalone/src/TimeoutTest.dart
diff --git a/tests/standalone/src/TimeoutTest.dart b/tests/standalone/src/TimeoutTest.dart
new file mode 100644
index 0000000000000000000000000000000000000000..8248721ce3324bfc990f997c4e4d0f7ddb0091bd
--- /dev/null
+++ b/tests/standalone/src/TimeoutTest.dart
@@ -0,0 +1,11 @@
+// Copyright (c) 2011, 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.
+
+
+// A test that runs forever.
+void main() {
+  final HOST = "127.0.0.1";
+  ServerSocket listenForever = new ServerSocket(HOST, 8001, 10);
+  // Does not call listenForever.close();
+}