Splitting the Mus demo code out of a service.

services/ui/demo/mus_demo_service.cc

+// 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 "services/ui/demo/mus_demo_service.h"
+
+#include "services/ui/demo/mus_demo.h"
+
+namespace ui {
+namespace demo {
+
+MusDemoService::MusDemoService() : mus_demo_(new MusDemo()) {}
+
+MusDemoService::~MusDemoService() {}
+
+void MusDemoService::OnStart(const service_manager::Identity& identity) {
+  mus_demo_->Start(connector());
+}
+
+bool MusDemoService::OnConnect(const service_manager::Identity& remote_identity,
+                               service_manager::InterfaceRegistry* registry) {
+  return true;
+}
+
+}  // namespace demo
+}  // namespace ui