Reset the window before its acquired layer is deleted

ui/wm/core/window_util_unittest.cc

Index: ui/wm/core/window_util_unittest.cc
diff --git a/ui/wm/core/window_util_unittest.cc b/ui/wm/core/window_util_unittest.cc
index fb7237165a0615b8d6a13b843095b32a5ba340da..35be225917956c27ea0f2630c012ecd467fd35e1 100644
--- a/ui/wm/core/window_util_unittest.cc
+++ b/ui/wm/core/window_util_unittest.cc
@@ -45,5 +45,8 @@ TEST_F(WindowUtilTest, RecreateLayers) {
   ASSERT_EQ(2u, window1->layer()->children().size());
   EXPECT_EQ(window11->layer(), window1->layer()->children()[0]);
   EXPECT_EQ(window12->layer(), window1->layer()->children()[1]);
+
+  // Delete the window before the acquired layer is deleted.
+  window11.reset();
 }
 }  // namespace wm