It's helpful to see the region range of the objects at certain times during debugging. We should include the information for renderers inside flow threads.
Created attachment 228498 [details] Patch
Comment on attachment 228498 [details] Patch r=me
Created attachment 228500 [details] Patch
Comment on attachment 228500 [details] Patch Clearing flags on attachment: 228500 Committed r166715: <http://trac.webkit.org/changeset/166715>
All reviewed patches have been landed. Closing bug.