The test DownloadShelfControllerTest.ViewVisibility is failing on Mac 10.9. See: https://luci-milo.appspot.com/buildbot/chromium.mac/Mac10.9%20Tests/35524, which appears to be the first failure. It has been failing in about 75% of test runs since then.
There's no obvious culprit in that build (maaaaybe https://codereview.chromium.org/2667723002 ?) and the log has no useful output, so I'm going disable the test and pass it over to the owners to take a closer look.
Comment 1 by tsergeant@chromium.org
, Feb 1 2017