[web-animations] web-animations/interfaces/Animatable/animate-no-browsing-context.html is a unique failure

[graouts]

87f47a6

[web-animations] web-animations/interfaces/Animatable/animate-no-browsing-context.html is a unique failure
https://bugs.webkit.org/show_bug.cgi?id=186494
rdar://problem/41000163

Reviewed by Dean Jackson.

The Web Animations spec defines several factors for an animation to be considered "ready" [0], one being
that the "user agent has completed any setup required to begin the playback of the animation's associated
effect including rendering the first frame of any keyframe effect".

While it does not specifically calls out the lack of a browsing context for the associated effect's target's
document, there certainly won't be any frames rendered in that specific case. So we do not run pending tasks,
the condition for the "ready" promise to resolve, if the associated effect is associated with a document
lacking a browsing context.

I filed a spec issue [1] to clarify this in the spec, but I believe the spirit of the spec already goes in
the direction of this test.

[0] https://drafts.csswg.org/web-animations-1/#ready
[1] w3c/csswg-drafts#8439

* LayoutTests/imported/w3c/web-platform-tests/web-animations/interfaces/Animatable/animate-no-browsing-context-expected.txt:
* Source/WebCore/animation/AnimationEffect.h:
(WebCore::AnimationEffect::preventsAnimationReadiness const):
* Source/WebCore/animation/KeyframeEffect.cpp:
(WebCore::KeyframeEffect::preventsAnimationReadiness const):
* Source/WebCore/animation/KeyframeEffect.h:
* Source/WebCore/animation/WebAnimation.cpp:
(WebCore::WebAnimation::tick):

Canonical link: https://commits.webkit.org/260101@main

80e03dc

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk2
	✅ 🛠 tv-sim	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress
	✅ 🛠 watch-sim
✅ 🛠 🧪 unsafe-merge

[webkit-early-warning-system]

EWS run on previous version of this PR (hash a368fff)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	⏳ 🛠 mac	🛠 wpe	⏳ 🛠 wincairo
🧪 bindings	⏳ 🛠 ios-sim	⏳ 🛠 mac-AS-debug	✅ 🛠 gtk
🧪 webkitperl	⏳ 🧪 ios-wk2	⏳ 🧪 api-mac	🧪 gtk-wk2
	⏳ 🧪 api-ios	⏳ 🧪 mac-wk1	🧪 api-gtk
⏳ 🛠 🧪 jsc	⏳ 🛠 tv	⏳ 🧪 mac-wk2	⏳ 🛠 jsc-armv7
⏳ 🛠 🧪 jsc-arm64	⏳ 🛠 tv-sim	⏳ 🧪 mac-AS-debug-wk2	⏳ 🧪 jsc-armv7-tests
	⏳ 🛠 watch	⏳ 🧪 mac-wk2-stress	⏳ 🛠 jsc-mips
	⏳ 🛠 watch-sim		⏳ 🧪 jsc-mips-tests

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 88dcbcd)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
⏳ 🧪 style	⏳ 🛠 ios	⏳ 🛠 mac	⏳ 🛠 wpe	⏳ 🛠 wincairo
⏳ 🧪 bindings	⏳ 🛠 ios-sim	⏳ 🛠 mac-AS-debug	⏳ 🛠 gtk
⏳ 🧪 webkitperl	⏳ 🧪 ios-wk2	⏳ 🧪 api-mac	⏳ 🧪 gtk-wk2
	⏳ 🧪 api-ios	⏳ 🧪 mac-wk1	⏳ 🧪 api-gtk
⏳ 🛠 🧪 jsc	⏳ 🛠 tv	⏳ 🧪 mac-wk2	⏳ 🛠 jsc-armv7
⏳ 🛠 🧪 jsc-arm64	⏳ 🛠 tv-sim	⏳ 🧪 mac-AS-debug-wk2	⏳ 🧪 jsc-armv7-tests
	⏳ 🛠 watch	⏳ 🧪 mac-wk2-stress	⏳ 🛠 jsc-mips
	⏳ 🛠 watch-sim		⏳ 🧪 jsc-mips-tests

[webkit-early-warning-system]

EWS run on current version of this PR (hash 80e03dc)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk2
	✅ 🛠 tv-sim	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress
	✅ 🛠 watch-sim
✅ 🛠 🧪 unsafe-merge

[webkit-commit-queue]

Committed 260101@main (87f47a6): https://commits.webkit.org/260101@main

Reviewed commits have been landed. Closing PR #9872 and removing active labels.