Reapply http://codereview.chromium.org/149542 now that issue with Mac builder is fixed(http://codereview.chromium.org/155591)

Review URL: http://codereview.chromium.org/149746

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2479 ce2b1a6d-e550-0410-aec6-3dcde31c8c00