Use the bare minimum tile coverage rect when under memory pressure.
Created attachment 234771 [details] Patch
Comment on attachment 234771 [details] Patch Cool!
Comment on attachment 234771 [details] Patch +1 :)
Comment on attachment 234771 [details] Patch Clearing flags on attachment: 234771 Committed r171012: <http://trac.webkit.org/changeset/171012>
All reviewed patches have been landed. Closing bug.