Port r15582 (585c121)

BUG=

Review URL: https://codereview.chromium.org/18881005
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15601 ce2b1a6d-e550-0410-aec6-3dcde31c8c00