Suppose the following case: <div id='shadow-host'> - <shadow-root> <content> <div id='fallback'>fallback which is not used.</div> </content> <div id='light-child'>light-child</div> </div> If we click '#fallback' element, an event listener on #shadow-host can see #fallback element through event.target, which breaks an upper boundary of Shadow DOM.
Created attachment 148368 [details] fix
Comment on attachment 148368 [details] fix Clearing flags on attachment: 148368 Committed r120754: <http://trac.webkit.org/changeset/120754>
All reviewed patches have been landed. Closing bug.