Example usage: yo cq_stats --help

BUG=
R=stip@chromium.org

Review URL: https://codereview.chromium.org/1232573007 .

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@296053 0039d316-1c4b-4281-b951-d872f2087c98