Making these tests async-friendly (by awaiting dynamic page changes) is required for a future patch in which we serve node frames off the main-thread.
<rdar://problem/104578997>
Created attachment 464616 [details] Patch
Committed 259336@main (c8aa4e87aecf): <https://commits.webkit.org/259336@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 464616 [details].