If you are not logged in with your Google account you are
faced with a blank screen. In order to make it more
clear for the Chromium sheriffs on how to close the
auto-roller I want to add this information.

R=machenbach@chromium.org
LOG=N
NOTRY=true

Review URL: https://codereview.chromium.org/1392823004

Cr-Commit-Position: refs/heads/master@{#31670}