content/test/data/nested-unload-2.html - chromium/src - Git at Google

 <!DOCTYPE html>
 <html>
   <script>
     window.addEventListener('unload', () => {
       window.top.document.querySelector('iframe').remove();
     });
   </script>
 </html>
	<!DOCTYPE html>
	<html>
	<script>
	window.addEventListener('unload', () => {
	window.top.document.querySelector('iframe').remove();
	});
	</script>
	</html>