WPT: https://github.com/web-platform-tests/wpt/pull/24844.
Created attachment 406194 [details] Patch
Created attachment 406218 [details] Patch Adjust PerformanceObserver expectations.
Comment on attachment 406218 [details] Patch r=me
Committed r265397: <https://trac.webkit.org/changeset/265397> All reviewed patches have been landed. Closing bug and clearing flags on attachment 406218 [details].
<rdar://problem/66705312>