| Index: third_party/WebKit/LayoutTests/shadow-dom/slotchange-slotname-renamed.html | 
| diff --git a/third_party/WebKit/LayoutTests/shadow-dom/slotchange-slotname-renamed.html b/third_party/WebKit/LayoutTests/shadow-dom/slotchange-slotname-renamed.html | 
| new file mode 100644 | 
| index 0000000000000000000000000000000000000000..db7f0be907d2884dfb85f4e22b153d14023f13ab | 
| --- /dev/null | 
| +++ b/third_party/WebKit/LayoutTests/shadow-dom/slotchange-slotname-renamed.html | 
| @@ -0,0 +1,38 @@ | 
| +<!DOCTYPE html> | 
| +<script src='../resources/testharness.js'></script> | 
| +<script src='../resources/testharnessreport.js'></script> | 
| +<script src='resources/shadow-dom.js'></script> | 
| +<!-- This is a micro benchmark to catch an unintentional regression. | 
| +     If the reason of a regression is clear, it is okay. | 
| +     We do not have to optimize the result of the benchmark. --> | 
| +<div id='d1'> | 
| +  <template data-mode='open' data-expose-as='d1_shadow'> | 
| +    <slot name='d1-s1'></slot> | 
| +  </template> | 
| +  <div id='d2' slot='d1-s1'></div> | 
| +</div> | 
| +<script> | 
| +'use strict'; | 
| +convertTemplatesToShadowRootsWithin(d1); | 
| +removeWhiteSpaceOnlyTextNodes(d1); | 
| + | 
| +async_test((test) => { | 
| + | 
| +  const d1_s1 = d1_shadow.querySelector('slot'); | 
| + | 
| +  assert_array_equals(d1_s1.assignedNodes(), [d2]); | 
| +  assert_array_equals(d1_s1.assignedNodes({'flatten': true}), [d2]); | 
| + | 
| +  d1_s1.addEventListener('slotchange', (e) => { | 
| +    test.step(() => { | 
| +      assert_equals(e.target, d1_s1); | 
| +      assert_array_equals(d1_s1.assignedNodes(), []); | 
| +      assert_array_equals(d1_s1.assignedNodes({'flatten': true}), []); | 
| +      assert_equals(e.scoped, true); | 
| +      test.done(); | 
| +    }); | 
| +  }); | 
| + | 
| +  d2.setAttribute('slot', 'non-exist'); | 
| +}, "slotchange event caused by renaming slot name"); | 
| +</script> | 
|  |