Build services as standalone executables

services/service_manager/runner/host/host_test_service_main.cc

Index: services/service_manager/runner/host/host_test_service_main.cc
diff --git a/services/service_manager/runner/host/host_test_service_main.cc b/services/service_manager/runner/host/host_test_service_main.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2ce8492f3f43f3ceab6a4b63a3ea771b7520478c
--- /dev/null
+++ b/services/service_manager/runner/host/host_test_service_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 "mojo/public/cpp/system/message_pipe.h"
+#include "services/service_manager/public/c/main.h"
+
+MojoResult ServiceMain(MojoHandle service_request_handle) {
+  mojo::ScopedMessagePipeHandle service_request_pipe;
+  service_request_pipe.reset(mojo::MessagePipeHandle(service_request_handle));
+  return MOJO_RESULT_OK;
+}