We should invalidate when event listeners change on Document or Window.
Created attachment 399651 [details] patch
Created attachment 399652 [details] patch
Comment on attachment 399652 [details] patch View in context: https://bugs.webkit.org/attachment.cgi?id=399652&action=review > LayoutTests/fast/scrolling/mac/wheel-event-listener-region-root-invalidation.html:27 > + document.body.offsetLeft; internals.layerTreeAsText triggers layout so I don't think this should be needed.
Committed r261820: <https://trac.webkit.org/changeset/261820> All reviewed patches have been landed. Closing bug and clearing flags on attachment 399652 [details].
<rdar://problem/63349119>