Import wpt@85e479ea4d3f234e5f4b2926aec3884238b73bcc

Using wpt-import in Chromium 038a01f1a3932bedd0118ad98c95c90085d838e9.
With Chromium commits locally applied on WPT:
9e3affdd55 "Ship `referer` header length limitation."
723f9a7899 "Prevent leaking Sec-CH-/Sec-Fetch- Request Headers on HTTPS Downgrade Redirects."
8bbed8ff92 "Reland tests from "Change ICE connection state on transceiver changes""


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:
eae@chromium.org, szager@chromium.org:
  external/wpt/intersection-observer
foolip@chromium.org, lpz@chromium.org, robertma@chromium.org:
  external/wpt/tools
guidou@chromium.org, armax@chromium.org:
  external/wpt/mediacapture-streams

NOAUTOREVERT=true
TBR=foolip

No-Export: true
Change-Id: Iaf8eac655a69d8d48bc3a4a6cbd92bc5a154fb5f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1659632
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@{#669081}