Add another client of the navigation service.

mash/webtest/main.cc

Index: mash/webtest/main.cc
diff --git a/mash/webtest/main.cc b/mash/webtest/main.cc
new file mode 100644
index 0000000000000000000000000000000000000000..65f18b0b207f836275c0b95d5e8edf005d8f99c7
--- /dev/null
+++ b/mash/webtest/main.cc
@@ -0,0 +1,12 @@
+// Copyright 2016 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 "mash/webtest/webtest.h"
+#include "mojo/public/c/system/main.h"
+#include "services/shell/public/cpp/application_runner.h"
+
+MojoResult MojoMain(MojoHandle shell_handle) {
+  shell::ApplicationRunner runner(new mash::webtest::Webtest);
+  return runner.Run(shell_handle);
+}