It was removed by <http://trac.webkit.org/changeset/174266>, because the comment stated it is a workaround for buggy python 2.6.1 which shipped on Snow Leopard. But it turned out the bug is still valid with python 2.7 shipped on the latest Ubuntu (12.04 and 14.04) and OS X 10.9.
Created attachment 239468 [details] Patch
Comment on attachment 239468 [details] Patch LGTM, r=me
Comment on attachment 239468 [details] Patch Clearing flags on attachment: 239468 Committed r174448: <http://trac.webkit.org/changeset/174448>
All reviewed patches have been landed. Closing bug.