Use promise_test in WPT beacon/beacon-common.sub.js instead of async_test
<rdar://problem/72940308>
Created attachment 417444 [details] Patch
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/27144
This patch modifies the imported WPT tests. Please ensure that any changes on the tests (not coming from a WPT import) are exported to WPT. Please see https://trac.webkit.org/wiki/WPTExportProcess
Comment on attachment 417444 [details] Patch r=me Would be good to mention in the ChangeLog that we're trying to avoid overwhelming the test server by limiting parallelism.
Created attachment 417469 [details] Patch for landing
Committed r271434: <https://trac.webkit.org/changeset/271434> All reviewed patches have been landed. Closing bug and clearing flags on attachment 417469 [details].