DRM offline playback test failed on ChromeOS

[joeyparrish]

The DRM offline test on ChromeOS failed. It appears that the test moved too slowly, but that playback was occurring.

Chrome 59.0.3071 (Chrome OS 9460.57.0)
  Offline stores, plays, and deletes protected content with a temporary license FAILED
    Expected 1.892163 to be greater than 3.
        at test/offline/offline_integration.js:187:41
        at <anonymous>

Failed 1 tests, passed 1177, skipped 43