[GTK] Unreviewed test gardening, fix build after r287519
Created attachment 448189 [details] Patch
Created attachment 448190 [details] Patch
Committed r287527 (245662@main): <https://commits.webkit.org/245662@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 448190 [details].
<rdar://problem/87056782>