GitLab

This is a reland of https://codereview.chromium.org/306083005/.
That was reverted because it implicitly added a dependency on
content from athena_shell.

This is identical to the original CL but still safe because
the dependency issue has been fixed already.

BUG=370204
TBR=oshima@chromium.org, benwells@chromium.org, reed@google.com
TEST=manually

Review URL: https://codereview.chromium.org/317163004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@275373 0039d316-1c4b-4281-b951-d872f2087c98