Import wpt@e129f454067507f7fac9aa3116f367728ffe334e

Using wpt-import in Chromium aef9d42.
With Chromium commits locally applied on WPT:
d969c04 "Fix issues with scrollbar-color invalidation with currentColor"



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/+/main/docs/testing/web_platform_tests.md

Directory owners for changes in this CL:
cbiesinger@chromium.org:
  external/wpt/css/css-flexbox
hbos@chromium.org, hta@chromium.org, guidou@chromium.org, phancke@microsoft.com:
  external/wpt/webrtc
rego@igalia.com:
  external/wpt/css/css-grid

NOAUTOREVERT=true
R=rubber-stamper@appspot.gserviceaccount.com

No-Export: true
Validate-Test-Flakiness: skip
Cq-Include-Trybots: luci.chromium.try:linux-wpt-identity-fyi-rel,linux-wpt-input-fyi-rel,linux-blink-rel
Change-Id: I29bf90fb59d35c38af313db5c40481c5dfa7dafd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4790345
Auto-Submit: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1184917}

third_party/blink/web_tests/TestExpectations

@@ -2733,6 +2733,7 @@ crbug.com/626703 external/wpt/css/css-backgrounds/border-image-repeat-round-stre
 crbug.com/626703 external/wpt/css/css-backgrounds/border-image-repeat-stretch-round-001.html [ Failure ]
 crbug.com/626703 external/wpt/css/css-nesting/nest-containing-forgiving.html [ Failure ]
 crbug.com/626703 [ Mac12 ] virtual/threaded-prefer-compositing/external/wpt/scroll-animations/view-timelines/view-timeline-range.html [ Timeout ]
+crbug.com/626703 [ Mac13 ] virtual/threaded-prefer-compositing/external/wpt/scroll-animations/view-timelines/view-timeline-range.html [ Timeout ]
 crbug.com/626703 virtual/threaded/external/wpt/css/css-backgrounds/border-image-repeat-round-003.html [ Failure ]
 crbug.com/626703 virtual/threaded/external/wpt/css/css-backgrounds/border-image-repeat-round-stretch-001.html [ Failure ]
 crbug.com/626703 virtual/threaded/external/wpt/css/css-backgrounds/border-image-repeat-stretch-round-001.html [ Failure ]