Import wpt@cf64e55132e3546234f0f941f29d9d6664a80dc6

Using wpt-import in Chromium 72511a7e57f7353b83d96d35b603545efaf5fa6b.
With Chromium commits locally applied on WPT:
68d5240e06 "[ChromeDriver] Set key modifiers with mouse actions"
a6d9cfdaf7 "[WPT] Changes to generated files by CL 1476144"
4665f96b94 "RestrictDeviceSensorEventsToSecureContexts by default."
03505df617 "[Origin Policy] Implement error reporting via Reporting API"
cdbd3b6703 "Fix flakiness of external/wpt/css/css-position/z-index-blend-will-change-overlapping-layers.html"


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:
hbos@chromium.org, hta@chromium.org:
  external/wpt/webrtc
meade@chromium.org:
  external/wpt/web-animations
mlamouri@chromium.org:
  external/wpt/screen-orientation

NOAUTOREVERT=true
TBR=lukebjerring

No-Export: true
Change-Id: Ia74d65451add96d5707ae6d13839a4bcf3990a0e
Reviewed-on: https://chromium-review.googlesource.com/c/1494974
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@{#636421}