chromeos: convert remaining AshTest usage to AshTestBase

ash/mus/top_level_window_factory_unittest.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/mus/top_level_window_factory.h"
 
 #include <stdint.h>
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "ash/mus/window_manager.h"
 #include "ash/mus/window_manager_application.h"
 #include "ash/shell.h"
-#include "ash/test/ash_test.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/ash_test_helper.h"
 #include "ash/wm/window_properties.h"
 #include "services/ui/public/cpp/property_type_converters.h"
 #include "ui/aura/mus/property_converter.h"
 #include "ui/aura/window.h"
 #include "ui/display/screen.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/test/gfx_util.h"
 #include "ui/wm/core/window_util.h"
@@ skipping 82 matching lines @@
   aura::Window* window = CreateAndParentTopLevelWindow(
       window_manager, ui::mojom::WindowType::WINDOW, &properties);
   ASSERT_TRUE(window->parent());
   EXPECT_EQ(kShellWindowId_DefaultContainer, window->parent()->id());
   EXPECT_EQ(bounds, window->bounds());
   EXPECT_EQ(WidgetCreationType::FOR_CLIENT,
             window->GetProperty(kWidgetCreationTypeKey));
 }
 
 }  // namespace ash