GitLab

This value used to be defined on the window object, but has since
moved to the "client".

BUG=163004


Review URL: https://chromiumcodereview.appspot.com/11348336

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@170860 0039d316-1c4b-4281-b951-d872f2087c98