Web Speech API: speechSynthesis.clear() removes utterances from following speechSynthesis.speak(...) as well

[fleizach]

3dc3ba3

Web Speech API: `speechSynthesis.clear()` removes utterances from following `speechSynthesis.speak(...)` as well
https://bugs.webkit.org/show_bug.cgi?id=191745
rdar://46151521

Reviewed by Tyler Wilcock.

Because cancel() callbacks happen asynchronously on the platform synthesizer, they can clear out the wrong utterance.

Test: fast/speechsynthesis/speech-synthesis-cancel-queued-utterances.html

* LayoutTests/fast/speechsynthesis/speech-synthesis-cancel-queued-utterances-expected.txt: Added.
* LayoutTests/fast/speechsynthesis/speech-synthesis-cancel-queued-utterances.html: Added.
* Source/WebCore/Modules/speech/SpeechSynthesis.cpp:
(WebCore::SpeechSynthesis::cancel):
(WebCore::SpeechSynthesis::handleSpeakingCompleted):
* Source/WebCore/platform/mock/PlatformSpeechSynthesizerMock.cpp:
(WebCore::PlatformSpeechSynthesizerMock::cancel):

Canonical link: https://commits.webkit.org/309349@main

9922248

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[webkit-early-warning-system]

EWS run on previous version of this PR (hash 25dfc71)

Details

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	⏳ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	✅ 🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe		✅ 🛠 vision-apple
	✅ 🧪 ios-wk2-wpt	✅ 🧪 api-mac-debug	✅ 🛠 gtk3-libwebrtc
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	❌ 🛠 ios-safer-cpp	✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
	✅ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🧪 vision-wk2	✅ 🧪 mac-intel-wk2
	✅ 🛠 tv	❌ 🛠 mac-safer-cpp
	✅ 🛠 tv-sim
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-ews-buildbot]

macOS Safer C++ Build #85570 (25dfc71)

❌ Found 1 failing file with 1 issue. Please address these issues before landing. See WebKit Guidelines for Safer C++ Programming.
(cc @rniwa)

[webkit-ews-buildbot]

iOS Safer C++ Build #3799 (25dfc71)

❌ Found 1 failing file with 1 issue. Please address these issues before landing. See WebKit Guidelines for Safer C++ Programming.
(cc @rniwa)

[webkit-early-warning-system]

EWS run on current version of this PR (hash 9922248)

Details

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	✅ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	❌ 🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe		✅ 🛠 vision-apple
	✅ 🧪 ios-wk2-wpt	✅ 🧪 api-mac-debug	✅ 🛠 gtk3-libwebrtc
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 ios-safer-cpp	✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🧪 vision-wk2	✅ 🧪 mac-intel-wk2
	✅ 🛠 tv	✅ 🛠 mac-safer-cpp
	✅ 🛠 tv-sim
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-commit-queue]

Committed 309349@main (3dc3ba3): https://commits.webkit.org/309349@main

Reviewed commits have been landed. Closing PR #60457 and removing active labels.