RenderLayer::updateOrRemoveFilterEffect is called in clearBacking(), which is called from RenderLayer::~RenderLayer, meaning that the filters are rebuild when deleting a layer, but they are not going to be used anyway. Avoid creating new filters when the RenderLayer is going out of scope.
<rdar://problem/11141839>
Created attachment 134422 [details] Patch V1
Comment on attachment 134422 [details] Patch V1 Clearing flags on attachment: 134422 Committed r112497: <http://trac.webkit.org/changeset/112497>
All reviewed patches have been landed. Closing bug.