Make PDFHUD.MoveIFrame API test more robust
Created attachment 415711 [details] Patch
<rdar://problem/68639688>
Comment on attachment 415711 [details] Patch r=me
Committed r270592: <https://trac.webkit.org/changeset/270592> All reviewed patches have been landed. Closing bug and clearing flags on attachment 415711 [details].