A shadow host wrongly stops an event propagation if an event target is an element of its child and the related target is the shadow host itself.
For example, suppose the following details/summary elements.
When a mouse moves from <summary> to <details>, we should not stop event propagation at <details> element and the event should bubble up.
Created attachment 104021 [details]
Comment on attachment 104021 [details]
Clearing flags on attachment: 104021
Committed r93184: <http://trac.webkit.org/changeset/93184>
All reviewed patches have been landed. Closing bug.