Fix compile error.

R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/25674004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17064 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Cancel push to trunk. Working on version 3.22.6 again.

TBR=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/25666003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17065 ce2b1a6d-e550-0410-aec6-3dcde31c8c00