Re-sync web-platform-tests/dom/events from upstream
Created attachment 375966 [details] Patch
Created attachment 375974 [details] Patch Adjust TestExpectations.
Comment on attachment 375974 [details] Patch Clearing flags on attachment: 375974 Committed r248647: <https://trac.webkit.org/changeset/248647>
All reviewed patches have been landed. Closing bug.
<rdar://problem/54281781>