The patch for bug #53512 introduced a separation of Path::fastBoundingRect and Path::boundingRect which were necessary because some platforms had started to use faster less accurate boundingRect calculations. Unfortunately Qt has not yet been update to use the more accurate implementation for Path::boundingRect() yet.
Created attachment 168961 [details] Patch
*** Bug 71766 has been marked as a duplicate of this bug. ***
Comment on attachment 168961 [details] Patch Clearing flags on attachment: 168961 Committed r131474: <http://trac.webkit.org/changeset/131474>
All reviewed patches have been landed. Closing bug.