BUG=v8:1807

Review URL: http://codereview.chromium.org/8439068
Patch from Ben Noordhuis <info@bnoordhuis.nl>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9864 ce2b1a6d-e550-0410-aec6-3dcde31c8c00