Add a startup benchmark and rudimentary scripts for running benchmarks.

benchmarks/startup/startup.cc

Index: benchmarks/startup/startup.cc
diff --git a/benchmarks/startup/startup.cc b/benchmarks/startup/startup.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4c38ba9bb59287d0c2d9bf50de40ec95e8490f7f
--- /dev/null
+++ b/benchmarks/startup/startup.cc
@@ -0,0 +1,15 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <stdlib.h>
+
+#include "mojo/public/c/system/main.h"
+
+MojoResult MojoMain(MojoHandle shell_handle) {
+  // Terminate the process as soon as we reach the application entrypoint. The
+  // testing script will instruct the shell to load this application and
+  // measure the execution time, which reflects the startup performance.
+  exit(0);
+  return MOJO_RESULT_OK;
+}