BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/23679007

Patch from Weiliang Lin <weiliang.lin2@gmail.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16901 ce2b1a6d-e550-0410-aec6-3dcde31c8c00