Make SpeechSynthesisUtterance an ActiveDOMObject

[szewai]

42ffbe1

Make SpeechSynthesisUtterance an ActiveDOMObject
https://bugs.webkit.org/show_bug.cgi?id=260214
rdar://113921763

Reviewed by Ryosuke Niwa.

Currently dispatching event to SpeechSynthesisUtterance can lead to crash due to GC. To fix that, we now keep wrapper
of SpeechSynthesisUtterance alive until there is no more event to be dispatched. This can happen in two cases:
1. SpeechSynthesisUtterance is not processed yet, and is removed from SpeechSynthesis's queue (i.e. the utterance will
not be processed).
2. SpeechSynthesisUtterance is being processed, and it finishes dispatching end or error event -- these two events are
the last events to be fired on an untterance according to spec: https://wicg.github.io/speech-api/#utterance-events.

* Source/WebCore/Modules/speech/SpeechSynthesis.cpp:
(WebCore::SpeechSynthesis::setPlatformSynthesizer):
(WebCore::SpeechSynthesis::cancel):
(WebCore::SpeechSynthesis::clearUtteranceQueue):
* Source/WebCore/Modules/speech/SpeechSynthesis.h:
* Source/WebCore/Modules/speech/SpeechSynthesisUtterance.cpp:
(WebCore::SpeechSynthesisUtterance::SpeechSynthesisUtterance):
(WebCore::SpeechSynthesisUtterance::eventOccurred):
(WebCore::SpeechSynthesisUtterance::errorEventOccurred):
(WebCore::SpeechSynthesisUtterance::dispatchEventAndUpdateState):
(WebCore::SpeechSynthesisUtterance::setIsActiveForEventDispatch):
(WebCore::SpeechSynthesisUtterance::activeDOMObjectName const):
(WebCore::SpeechSynthesisUtterance::virtualHasPendingActivity const):
* Source/WebCore/Modules/speech/SpeechSynthesisUtterance.h:
* Source/WebCore/Modules/speech/SpeechSynthesisUtterance.idl:

Canonical link: https://commits.webkit.org/266959@main

48f207c

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 472814b)

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash c8b007f)

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

[rniwa]

r=me on the original PR.

[webkit-early-warning-system]

EWS run on current version of this PR (hash 48f207c)

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

[webkit-commit-queue]

Committed 266959@main (42ffbe1): https://commits.webkit.org/266959@main

Reviewed commits have been landed. Closing PR #16714 and removing active labels.