Change it to a plain static pointer and initialize lazy.

BUG=83856
TEST=None

R=ager@chromium.org,mnaganov@chromium.org
Signed-off-by: Thiago Farina <tfarina@chromium.org>

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9120 ce2b1a6d-e550-0410-aec6-3dcde31c8c00