mustash: Use ui::chromeos::EventRewriter in mus

services/ui/ws/cursor_unittest.cc

Index: services/ui/ws/cursor_unittest.cc
diff --git a/services/ui/ws/cursor_unittest.cc b/services/ui/ws/cursor_unittest.cc
index c2061185e353d9b5bcebe187e0371d4e5f14d99e..2ca526216c075aa9182227440252ee4dd1c732ef 100644
--- a/services/ui/ws/cursor_unittest.cc
+++ b/services/ui/ws/cursor_unittest.cc
@@ -95,7 +95,9 @@ class CursorTest : public testing::Test {
     WindowManagerDisplayRoot* active_display_root =
         display->GetActiveWindowManagerDisplayRoot();
     ASSERT_TRUE(active_display_root);
-    static_cast<PlatformDisplayDelegate*>(display)->OnEvent(PointerEvent(
+
+    DisplayTestApi display_test_api(display);
+    display_test_api.OnEvent(PointerEvent(
         MouseEvent(ET_MOUSE_MOVED, p, p, base::TimeTicks(), 0, 0)));
     WindowManagerState* wms = active_display_root->window_manager_state();
     wms->OnEventAck(wms->window_tree(), mojom::EventResult::HANDLED);