Resync web-platform-tests/beacon from upstream.
Created attachment 453997 [details] Patch
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
Created attachment 454001 [details] Patch
Committed r290977 (248155@main): <https://commits.webkit.org/248155@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 454001 [details].
<rdar://problem/89953144>