| Index: third_party/WebKit/LayoutTests/custom-elements/imports/async-imports.html | 
| diff --git a/third_party/WebKit/LayoutTests/custom-elements/imports/async-imports.html b/third_party/WebKit/LayoutTests/custom-elements/imports/async-imports.html | 
| new file mode 100644 | 
| index 0000000000000000000000000000000000000000..6a3e5fa3d4f261758dfb45c5ee8f5c6617846850 | 
| --- /dev/null | 
| +++ b/third_party/WebKit/LayoutTests/custom-elements/imports/async-imports.html | 
| @@ -0,0 +1,21 @@ | 
| +<!DOCTYPE html> | 
| +<script src="../../resources/testharness.js"></script> | 
| +<script src="../../resources/testharnessreport.js"></script> | 
| +<script src="../spec/resources/custom-elements-helpers.js"></script> | 
| +<link id="import1" rel="import" href="resources/async-component.html" async> | 
| +<a-a></a-a> | 
| +<script> | 
| +'use strict'; | 
| + | 
| +promise_test(() => { | 
| +  return customElements.whenDefined('a-a').then(() => { | 
| +    let a = document.querySelector('a-a'); | 
| +    assert_is_upgraded(a, AsyncComponent, | 
| +                       '<async-component> in this document should have been upgraded.'); | 
| + | 
| +    let b = import1.import.querySelector('a-a'); | 
| +    assert_is_upgraded(b, AsyncComponent, | 
| +                       '<async-component> in imported document should have been upgraded.'); | 
| +  }); | 
| +}, 'custom elements definition in async import should work.'); | 
| +</script> | 
|  |