Adds ash_mus_unittests to FYI bot

ash/wm/window_cycle_controller_unittest.cc

 // 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.
 
 #include "ash/common/wm/window_cycle_controller.h"
 
 #include <algorithm>
 #include <memory>
 
 #include "ash/common/focus_cycler.h"
@@ skipping 474 matching lines @@
   if (WmShell::Get()->IsRunningInMash())
     return;
 
   // The tested behavior relies on the app list presenter implementation.
   test::TestAppListViewPresenterImpl app_list_presenter_impl;
 
   WindowCycleController* controller = Shell::Get()->window_cycle_controller();
 
   std::unique_ptr<aura::Window> window0(CreateTestWindowInShellWithId(0));
   std::unique_ptr<aura::Window> window1(CreateTestWindowInShellWithId(1));
-  app_list_presenter_impl.Show(display_manager()->first_display_id());
+  app_list_presenter_impl.Show(
+      display::Screen::GetScreen()->GetPrimaryDisplay().id());
   EXPECT_TRUE(app_list_presenter_impl.IsVisible());
   controller->HandleCycleWindow(WindowCycleController::FORWARD);
   EXPECT_FALSE(app_list_presenter_impl.IsVisible());
 
   // Make sure that dismissing the app list this way doesn't pass activation
   // to a different window.
   EXPECT_FALSE(wm::IsActiveWindow(window0.get()));
   EXPECT_FALSE(wm::IsActiveWindow(window1.get()));
 
   controller->CompleteCycling();
@@ skipping 256 matching lines @@
     // Base case sets the expectation for other cases.
     if (expected_bounds.IsEmpty())
       expected_bounds = display_relative_bounds;
     else
       EXPECT_EQ(expected_bounds, display_relative_bounds);
     controller->CompleteCycling();
   }
 }
 
 }  // namespace ash