No paint to layer for custom notification close button

ui/message_center/views/custom_notification_view.cc

Index: ui/message_center/views/custom_notification_view.cc
diff --git a/ui/message_center/views/custom_notification_view.cc b/ui/message_center/views/custom_notification_view.cc
index 5e53a4cbc501fbe2e8192f4f8ee6f23adf1be8c5..7be48013c43aa3845aa11a1fda8681082a27f901 100644
--- a/ui/message_center/views/custom_notification_view.cc
+++ b/ui/message_center/views/custom_notification_view.cc
@@ -32,10 +32,6 @@ CustomNotificationView::CustomNotificationView(
   AddChildView(small_image());
 
   CreateOrUpdateCloseButtonView(notification);
-
-  // Use a layer for close button so that custom content does not eclipse it.
-  if (close_button())
-    close_button()->SetPaintToLayer(true);
 }
 
 CustomNotificationView::~CustomNotificationView() {}