To protect suspicious/dangerous problem (a source of dead lock), locking range should be adjusted.
Created attachment 168329 [details] Patch
I tested layout test and unit test on EFL, and there was no regressions.
This needs to be rebased after Bug 101015
Created attachment 172048 [details] Patch
Comment on attachment 172048 [details] Patch looks sane
Comment on attachment 172048 [details] Patch Clearing flags on attachment: 172048 Committed r133307: <http://trac.webkit.org/changeset/133307>
All reviewed patches have been landed. Closing bug.