updateShapeOutsideInfoAfterStyleChange should never show up on profiles if shapes are not being used. We need to make sure it doesn't impact perf. I was seeing it as 0.3% of time.
Created attachment 224693 [details] Patch
Seems fine to me. It looks like Shape Inside may suffer from a similar concern with RenderBlock::updateShapeInsideInfoAfterStyleChange. I can fix that up after this lands.
Comment on attachment 224693 [details] Patch Clearing flags on attachment: 224693 Committed r164471: <http://trac.webkit.org/changeset/164471>
All reviewed patches have been landed. Closing bug.