We should stop using the RenderArena for line boxes. This may be a small performance at first, but will diminish as simple line layout improves. Memory usage will likely improve immediately.
Created attachment 215565 [details] Patch
Comment on attachment 215565 [details] Patch r=me
Comment on attachment 215565 [details] Patch Clearing flags on attachment: 215565 Committed r158321: <http://trac.webkit.org/changeset/158321>
All reviewed patches have been landed. Closing bug.