After r202040, runLoop() in CompositingRunLoop.h is removed. But it remains in debug code. I'll provide a patch.
Created attachment 283628 [details] Patch
Comment on attachment 283628 [details] Patch Clearing flags on attachment: 283628 Committed r203223: <http://trac.webkit.org/changeset/203223>
All reviewed patches have been landed. Closing bug.