Opening find banner in editor causes UI to hang.
Steps to Reproduce:
1. Goto daring fireball.net
2. Open Resources tab, select main resource
3. Command-F to open the find banner
=> Banner begins to slide into view then stops.
=> Number of matches is a large number.
=> UI hangs.
Regressed in https://trac.webkit.org/r209882.
Created attachment 297344 [details]
Comment on attachment 297344 [details]
Clearing flags on attachment: 297344
Committed r209933: <http://trac.webkit.org/changeset/209933>
All reviewed patches have been landed. Closing bug.