mash: remove the LockStateControllerDelegate.

ash/wm/shutdown_client_proxy.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 "ash/wm/shutdown_client_proxy.h"
+
+#include "ash/public/interfaces/shutdown.mojom.h"
+#include "services/service_manager/public/cpp/connector.h"
+
+namespace ash {
+
+ShutdownClientProxy::ShutdownClientProxy(service_manager::Connector* connector)
+    : connector_(connector) {}
+
+ShutdownClientProxy::~ShutdownClientProxy() {}
+
+void ShutdownClientProxy::RequestShutdown() {
+  mojom::ShutdownClientPtr client;
+  connector_->ConnectToInterface("service:content_browser", &client);
+  client->RequestShutdown();
+}
+
+}  // namespace ash