Gets chrome --mus some what working

chrome/browser/chromeos/ash_config.cc

+// Copyright 2017 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 "chrome/browser/chromeos/ash_config.h"
+
+#include "base/command_line.h"
+#include "chrome/common/chrome_switches.h"
+#include "services/service_manager/runner/common/client_util.h"
+
+namespace chromeos {
+
+ash::Config GetConfig() {
+  if (!service_manager::ServiceManagerIsRemote())
+    return ash::Config::CLASSIC;
+
+  return base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+             switches::kMusConfig) == switches::kMash
+             ? ash::Config::MASH
+             : ash::Config::MUS;
+}
+
+}  // namespace chromeos