Performance dashboard identified a 1.8% regression in jetstream/Score on cros-caroline at revision range 30890000953100001:30920000953200000. Graph: https://chromeperf.appspot.com/report?masters=ChromeOSPerf&bots=cros-caroline&tests=jetstream%2FScore&checked=Score%2CScore_ref%2Cref&rev=30920000953200000

jetstream score degraded on many boards. File this one as a representative.

The problem happens also since Chrome version 60.0.3092.0

Maybe related to https://bugs.chromium.org/p/chromium/issues/detail?id=721432