third_party/WebKit/LayoutTests/http/tests/security/resources/location-prototype-overwrite.html - chromium/src - Git at Google

 <!DOCTYPE HTML>
 <script>
 // Make sure touch top window location first, get the hook to inject function.
 window.top.location;

 Object.prototype.fail = function() {
   alert('FAIL!');
 };
 </script>
	<!DOCTYPE HTML>
	<script>
	// Make sure touch top window location first, get the hook to inject function.
	window.top.location;

	Object.prototype.fail = function() {
	alert('FAIL!');
	};
	</script>