Intermittent timeout in /FileAPI/url/url-in-tags-revoke.window.html

[jdm]

  ▶ TIMEOUT [expected OK] /FileAPI/url/url-in-tags-revoke.window.html
  │ 
  │ VMware, Inc.
  │ softpipe
  │ 3.3 (Core Profile) Mesa 17.3.0-devel
  │ Loading blob blob:http://web-platform.test:8000/3196b2366bb04e77a59867407b4724ad
  └ Loading blob blob:http://web-platform.test:8000/5282db8385ce43bd88c5976692f76c1d

  ▶ Unexpected subtest result in /FileAPI/url/url-in-tags-revoke.window.html:
  │ TIMEOUT [expected PASS] Fetching a blob URL immediately before revoking it works in <script> tags.
  └   → Test timed out