It uses screen size instead of actual visible size. It causes frame rect always larger than the actual visible one and ends up with find-on-page does not scroll correctly sometimes.
Created attachment 160835 [details]
Comment on attachment 160835 [details]
Clearing flags on attachment: 160835
Committed r126871: <http://trac.webkit.org/changeset/126871>
All reviewed patches have been landed. Closing bug.