This is so that Chromium can have its own overridable default value without colliding with ours.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/26317009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17193 ce2b1a6d-e550-0410-aec6-3dcde31c8c00