mojo: fix little bug in DynamicServiceLoader/Runner

mojo/shell/in_process_dynamic_service_runner_unittest.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/shell/context.h"
+#include "mojo/shell/in_process_dynamic_service_runner.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace mojo {
+namespace shell {
+
+TEST(InProcessDynamicServiceRunnerTest, NotStarted) {
+  base::MessageLoop loop;
+  Context context;
+  InProcessDynamicServiceRunner runner(&context);
+  // Shouldn't crash or DCHECK on destruction.
+}
+
+}  // namespace shell
+}  // namespace mojo