Start removing deprecated Options UI code

chrome/browser/ui/webui/options/chromeos/guest_mode_options_browsertest.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 "chrome/browser/ui/webui/options/chromeos/guest_mode_options_browsertest.h"
-
-#include "base/command_line.h"
-#include "chrome/browser/ui/webui/options/options_ui_browsertest.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/test/base/testing_profile.h"
-#include "chromeos/chromeos_switches.h"
-#include "components/signin/core/account_id/account_id.h"
-#include "components/user_manager/user_names.h"
-
-GuestModeOptionsUIBrowserTest::GuestModeOptionsUIBrowserTest() {}
-
-GuestModeOptionsUIBrowserTest::~GuestModeOptionsUIBrowserTest() {}
-
-void GuestModeOptionsUIBrowserTest::SetUpCommandLine(
-    base::CommandLine* command_line) {
-  command_line->AppendSwitch(chromeos::switches::kGuestSession);
-  command_line->AppendSwitchASCII(
-      chromeos::switches::kLoginUser,
-      user_manager::GuestAccountId().GetUserEmail());
-  command_line->AppendSwitchASCII(chromeos::switches::kLoginProfile,
-                                  TestingProfile::kTestUserProfileDir);
-  command_line->AppendSwitch(switches::kIncognito);
-}