getDisplayMedia requires a prompt and user selection, so we should never need to build a list of every window and screen.
<rdar://problem/105018387>
Pull request: https://github.com/WebKit/WebKit/pull/9625
Committed 259969@main (1ad6bf1f3f6c): <https://commits.webkit.org/259969@main> Reviewed commits have been landed. Closing PR #9625 and removing active labels.