Mojo: Add a trivial end-to-end (in-process) test of Mojo shell.

mojo/services/test_service/test_service_application.cc

+// 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 "mojo/public/cpp/application/application.h"
+#include "mojo/public/cpp/system/macros.h"
+#include "mojo/services/test_service/test_service_impl.h"
+
+namespace mojo {
+namespace test {
+namespace {
+
+class TestServiceApplication : public Application {
+ public:
+  TestServiceApplication() {}
+  virtual ~TestServiceApplication() {}
+
+  virtual void Initialize() MOJO_OVERRIDE {
+    AddService<TestServiceImpl>();
+  }
+
+ private:
+  MOJO_DISALLOW_COPY_AND_ASSIGN(TestServiceApplication);
+};
+
+}  // namespace
+}  // namespace test
+
+// static
+Application* Application::Create() {
+  return new mojo::test::TestServiceApplication();
+}
+
+}  // namespace mojo