[UI-side compositing] fast/canvas/webgl/lose-context-on-timeout.html fails

[kkinnunen-apple]

28a6eb5

[UI-side compositing] fast/canvas/webgl/lose-context-on-timeout.html fails
https://bugs.webkit.org/show_bug.cgi?id=253496
rdar://106115219

Reviewed by Simon Fraser.

The simulated timeout mechanism does not at the moment apply immediately
because it posts work from GPUP RemoteGraphicsContextGL work queue to
main thread. Take this into account in lose-context-on-timeout.html
by ensuring that the call to be timed out is called potentially
multiple times.

Also fix other test problems related to lose-context-on-timeout.html
and the async variant:
- Use a method that is more likely not cached caller side
- Register the WebGL context lost handler before the context loss has
  chance of being invoked
- Use test metadata to always select GPUP WebGL as the testing variant.
  This way the testing skips can be removed from the TestExpectations
  and the test is run by default.

* LayoutTests/TestExpectations:
* LayoutTests/fast/canvas/webgl/lose-context-on-timeout-async-expected.txt:
* LayoutTests/fast/canvas/webgl/lose-context-on-timeout-async.html:
* LayoutTests/fast/canvas/webgl/lose-context-on-timeout-expected.txt:
* LayoutTests/fast/canvas/webgl/lose-context-on-timeout.html:
* LayoutTests/platform/mac-wk2/TestExpectations:

Canonical link: https://commits.webkit.org/261360@main

1b2013c

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 3dea854)

Details

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

[webkit-early-warning-system]

EWS run on current version of this PR (hash 1b2013c)

Details

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

[webkit-commit-queue]

Committed 261360@main (28a6eb5): https://commits.webkit.org/261360@main

Reviewed commits have been landed. Closing PR #11166 and removing active labels.