Move ui_services_unittests into service_unittest.

services/ui/public/cpp/tests/window_server_test_suite.h

-// Copyright 2014 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.
-
-#ifndef SERVICES_UI_PUBLIC_CPP_TESTS_WINDOW_SERVER_TEST_SUITE_H_
-#define SERVICES_UI_PUBLIC_CPP_TESTS_WINDOW_SERVER_TEST_SUITE_H_
-
-#include "base/macros.h"
-#include "base/test/test_suite.h"
-
-namespace ui {
-
-class WindowServerTestSuite : public base::TestSuite {
- public:
-  WindowServerTestSuite(int argc, char** argv);
-  ~WindowServerTestSuite() override;
-
- protected:
-  void Initialize() override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(WindowServerTestSuite);
-};
-
-}  // namespace ui
-
-#endif  // SERVICES_UI_PUBLIC_CPP_TESTS_WINDOW_SERVER_TEST_SUITE_H_