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

services/ui/ws/display_unittest.cc

Index: services/ui/ws/display_unittest.cc
diff --git a/services/ui/ws/display_unittest.cc b/services/ui/ws/display_unittest.cc
index f2041f1f5ddf4006ccdbc1d94843f650c48165a5..397f1c76ca357e8afa42f11902d079a50321594a 100644
--- a/services/ui/ws/display_unittest.cc
+++ b/services/ui/ws/display_unittest.cc
@@ -261,10 +261,10 @@ TEST_F(DisplayTest, EventStateResetOnUserSwitch) {
   ASSERT_TRUE(active_wms);
   EXPECT_EQ(kTestId1, active_wms->user_id());
 
-  static_cast<PlatformDisplayDelegate*>(display)->OnEvent(ui::PointerEvent(
-      ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(20, 25),
-                     gfx::Point(20, 25), base::TimeTicks(),
-                     ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON)));
+  DisplayTestApi display_test_api(display);
+  display_test_api.OnEvent(ui::PointerEvent(ui::MouseEvent(
+      ui::ET_MOUSE_PRESSED, gfx::Point(20, 25), gfx::Point(20, 25),
+      base::TimeTicks(), ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON)));
 
   EXPECT_TRUE(EventDispatcherTestApi(active_wms->event_dispatcher())
                   .AreAnyPointersDown());