The test fast/mediastream/get-display-media-settings.html has failed on GTK and WPE since its addition in r286491, because typeof settings.deviceId is "undefined". This is likely because the change in question added support for deviceId for the Cocoa and Mock platforms but not for GStreamer.
Created attachment 447800 [details] Patch
Committed r287386 (245526@main): <https://commits.webkit.org/245526@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 447800 [details].
<rdar://problem/86842768>