Fix 'auto variable type must not deduce to a raw pointer type' errors in Ozone/Wayland code

ui/ozone/platform/wayland/wayland_window_unittest.cc

Index: ui/ozone/platform/wayland/wayland_window_unittest.cc
diff --git a/ui/ozone/platform/wayland/wayland_window_unittest.cc b/ui/ozone/platform/wayland/wayland_window_unittest.cc
index 0493c8f0f391b4b144ec9aecdc71554938d07752..66b50db30c8d67387b3195d0cade6a07886addb2 100644
--- a/ui/ozone/platform/wayland/wayland_window_unittest.cc
+++ b/ui/ozone/platform/wayland/wayland_window_unittest.cc
@@ -94,7 +94,7 @@ TEST_F(WaylandWindowTest, DispatchEvent) {
   window.DispatchEvent(&test_mouse_event);
   ASSERT_TRUE(event);
   ASSERT_TRUE(event->IsMouseEvent());
-  auto mouse_event = event->AsMouseEvent();
+  auto* mouse_event = event->AsMouseEvent();
   EXPECT_EQ(mouse_event->location_f(), test_mouse_event.location_f());
   EXPECT_EQ(mouse_event->root_location_f(), test_mouse_event.root_location_f());
   EXPECT_EQ(mouse_event->time_stamp(), test_mouse_event.time_stamp());