The following tests fail on GTK after r230000:
[Web Animations] Stop using internals.pauseAnimationAtTimeOnElement() in favor of Web Animations API for animations tests
Maybe it's a Web Animations bug in GTK?
animations/animation-iteration-event-destroy-renderer.html started timing out at the same time, likely related.
animations/change-keyframes.html is now passing since r233512
(In reply to Alicia Boya García from comment #1)
> animations/animation-iteration-event-destroy-renderer.html started timing
> out at the same time, likely related.
This is passing now.
All of the failing tests are passing since r236541