Import wpt@6185fc083a08ea74f0ddfffff917321fb6ffa42d

Using wpt-import in Chromium 454a4f0cb9c837740bbb0bb1f07809728f98f4a6.

Note to sheriffs: This CL imports external tests and adds
expectations for those tests; if this CL is large and causes
a few new failures, please fix the failures by adding new
lines to TestExpectations rather than reverting. See:
https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md

Directory owners for changes in this CL:
chcunningham@chromium.org, wolenetz@chromium.org:
  external/wpt/media-source
jsbell@chromium.org:
  external/wpt/resources

NOAUTOREVERT=true
TBR=raphael.kubo.da.costa

No-Export: true
Change-Id: Ia09e3aaf2750bf36e54d5e1fbc6bb85fa85476c9
Reviewed-on: https://chromium-review.googlesource.com/c/1365716
Reviewed-by: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#614412}
16 files changed