| Index: third_party/WebKit/LayoutTests/security/immutable-prototype.html
 | 
| diff --git a/third_party/WebKit/LayoutTests/security/immutable-prototype.html b/third_party/WebKit/LayoutTests/security/immutable-prototype.html
 | 
| new file mode 100644
 | 
| index 0000000000000000000000000000000000000000..dff8a6d9ab16aa21e801c65d99a801d61da34e43
 | 
| --- /dev/null
 | 
| +++ b/third_party/WebKit/LayoutTests/security/immutable-prototype.html
 | 
| @@ -0,0 +1,15 @@
 | 
| +<!DOCTYPE html>
 | 
| +<html>
 | 
| +<script src="../resources/testharness.js"></script>
 | 
| +<script src="../resources/testharnessreport.js"></script>
 | 
| +<script src="immutable-prototype.js"></script>
 | 
| +<script>
 | 
| +'use strict';
 | 
| +
 | 
| +test(() => {
 | 
| +  let result = prototypeChain(window);
 | 
| +  assert_array_equals(result,
 | 
| +                      ['immutable', 'immutable', 'immutable', 'immutable', 'immutable']);
 | 
| +}, 'global object prototype chain should be immutable');
 | 
| +</script>
 | 
| +</html>
 | 
| 
 |