I made this test while working on an optimization, and it seems useful to have in the tree since it adds additional coverage. The optimization may come later.
Created attachment 240020 [details] Patch
Comment on attachment 240020 [details] Patch r=me.
Comment on attachment 240020 [details] Patch Clearing flags on attachment: 240020 Committed r174828: <http://trac.webkit.org/changeset/174828>
All reviewed patches have been landed. Closing bug.