Import wpt@be4a903bca0a01b794bebf486f707c9f8e9e9ff6

Using wpt-import in Chromium ff64aa2b.
With Chromium commits locally applied on WPT:
f6984fd9 "De-flaky pointerlock/pointerevent_pointermove_in_pointerlock.html"
45436d4d "CookieStore: WPT to verify subscribe/unsubscribe is idempotent"
fc4093a6 "Move mouse-pointer-preventdefault.html to wpt"
3304d0fe "Revert "Move mouse-pointer-preventdefault.html to wpt""


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

NOAUTOREVERT=true
TBR=robertma

No-Export: true
Change-Id: I700238d8da3501763e14cda400d973e536be2b27
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2212388Reviewed-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@{#771465}

third_party/blink/web_tests/TestExpectations

@@ -5885,4 +5885,4 @@ crbug.com/1080609 virtual/threaded/external/wpt/scroll-animations/element-based-
 # Fails when test moved to use full compositor pipe.
 crbug.com/1085832 [ Fuchsia ] images/size-failure.html [ Timeout ]
 
-crbug.com/971031 [ Mac ] fast/dom/timer-throttling-hidden-page.html [ Pass Failure ]
+crbug.com/971031 [ Mac ] fast/dom/timer-throttling-hidden-page.html [ Pass Failure ]
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