Import wpt@71fad8a1b1e863b58b9842038b0ff031d35c9406

Using wpt-import in Chromium 2ad329a8895a3dbe0f070c911d11a39a9fd81d17.

Build: https://ci.chromium.org/buildbot/chromium.infra.cron/wpt-importer/11388

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:
cbiesinger@chromium.org:
  external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox
drott@chromium.org, kojii@chromium.org:
  external/wpt/css/css-fonts
jsbell@chromium.org:
  external/wpt/resources
ksakamoto@chromium.org:
  external/wpt/resource-timing
meade@chromium.org:
  external/wpt/web-animations
rego@igalia.com:
  external/wpt/css/selectors
tyoshino@chromium.org, yhirano@chromium.org, mkwst@chromium.org, japhet@chromium.org:
  external/wpt/fetch

TBR=lukebjerring

No-Export: true
Change-Id: I3d3acd548e4d95a9f377f5104597fb1928130b7d
Reviewed-on: https://chromium-review.googlesource.com/895662
Commit-Queue: Robert Ma <robertma@chromium.org>
Reviewed-by: Robert Ma <robertma@chromium.org>
Reviewed-by: Blink WPT Bot <blink-w3c-test-autoroller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533346}
81 files changed