The WPT test at imported/w3c/web-platform-tests/web-animations/animation-model/keyframe-effects/effect-value-context.html is failing reliably, flaky or timing out.
<rdar://problem/41000137>
Need to investigate this, we reliably fail this test, there seems to be an issue re-resolving em values after font-size changes.
Pull request: https://github.com/WebKit/WebKit/pull/6629
Committed 256889@main (6f8d19cd8506): <https://commits.webkit.org/256889@main> Reviewed commits have been landed. Closing PR #6629 and removing active labels.