chromeos: Move device shutdown handling out of chrome into ash

ash/wm/shutdown_client_proxy.cc

Index: ash/wm/shutdown_client_proxy.cc
diff --git a/ash/wm/shutdown_client_proxy.cc b/ash/wm/shutdown_client_proxy.cc
deleted file mode 100644
index 316df3a49abe9cb72d7c79e05c796e879076a600..0000000000000000000000000000000000000000
--- a/ash/wm/shutdown_client_proxy.cc
+++ /dev/null
@@ -1,23 +0,0 @@
-// 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