Splitting this issue out from

Latest builds for continuous builder: https://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Ozone%20Tests%20%281%29?numbuilds=200

Latest builds for try bot: https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_chromeos_ozone_rel_ng?numbuilds=200

Flakiness dashboard: https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=mash_browser_tests

Flakiness dashboard now shows that 
  ExperimentalAppWindowApiTest.SetIcon
  CreateNewFolder/FileManagerBrowserTest.Test/{0,1,2,3}
have become flaky.

kmarshall@, quick question: Do changes for Fuchsia affect "ChromeOS Ozone"? (There were a couple of changes around the time that these tests became flaky.)