Adds ash_mus_unittests to FYI bot

ash/display/display_configuration_controller_unittest.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 "ash/common/wm_shell.h"
 #include "ash/rotator/screen_rotation_animator.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/display_configuration_controller_test_api.h"
 #include "base/macros.h"
 #include "ui/display/manager/display_manager.h"
 
 namespace ash {
 
-class DisplayConfigurationControllerTest : public test::AshTestBase {
- public:
-  DisplayConfigurationControllerTest() {}
-  ~DisplayConfigurationControllerTest() override {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(DisplayConfigurationControllerTest);
-};
+using DisplayConfigurationControllerTest = test::AshTestBase;
 
 TEST_F(DisplayConfigurationControllerTest, ErasesAnimatorOnAnimationEnded) {
   // TODO(wutao): needs display_configuration_controller
   // http://crbug.com/686839.
   if (WmShell::Get()->IsRunningInMash())
     return;
 
   display::Display display = display::Screen::GetScreen()->GetPrimaryDisplay();
   test::DisplayConfigurationControllerTestApi testapi(
       Shell::Get()->display_configuration_controller());
   ScreenRotationAnimator* screen_rotation_animator =
       testapi.GetScreenRotationAnimatorForDisplay(display.id());
   EXPECT_EQ(1, testapi.DisplayScreenRotationAnimatorMapSize());
 
   Shell::Get()->display_manager()->SetDisplayRotation(
       display.id(), display::Display::ROTATE_0,
       display::Display::RotationSource::ROTATION_SOURCE_USER);
   screen_rotation_animator->Rotate(
       display::Display::ROTATE_90,
       display::Display::RotationSource::ROTATION_SOURCE_USER);
   EXPECT_EQ(0, testapi.DisplayScreenRotationAnimatorMapSize());
 }
 
 }  // namespace ash