GitLab

This is often uninitialized in UI and browser tests. This blocks issue 10829031
from landing.

BUG=139093


Review URL: https://chromiumcodereview.appspot.com/10831104

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149761 0039d316-1c4b-4281-b951-d872f2087c98