It looks like the changes in https://trac.webkit.org/changeset/286596/webkit Caused these two tests to timeout on iOS: compositing/tiling/tiled-reflection-inwindow.html fast/forms/ios/focus-select-and-switch-tabs.html Current history shows a very clear regression point at r286596 History: https://results.webkit.org/?suite=layout-tests&suite=layout-tests&test=editing%2Fpasteboard%2Fdom-paste%2Fdom-paste-requires-user-gesture.html&test=fast%2Fforms%2Fios%2Ffocus-select-and-switch-tabs.html&platform=ios
<rdar://problem/86225863>
fixed this by reverting in https://trac.webkit.org/changeset/286709/webkit
<rdar://problem/86226180>