Implement messageerror event

[cdumez]

5e2beb5

Implement messageerror event
https://bugs.webkit.org/show_bug.cgi?id=171216
rdar://96467919

Reviewed by Darin Adler.

Implement messageerror event:
- whatwg/html#2530

Previously, WebKit would fire a `message` event with its `data` being null,
whenever data deserialization would fail. This wasn't as per specification and
did not match other browser engines. We're supposed to fire a `messageerror`
event instead.

This patch addresses the issue.

* LayoutTests/imported/w3c/web-platform-tests/html/webappapis/scripting/events/event-handler-attributes-body-window-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/html/webappapis/scripting/events/event-handler-attributes-windowless-body-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/wasm/serialization/module/broadcastchannel-success-and-failure-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/wasm/serialization/module/window-sharedworker-failure-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/webmessaging/messageerror-expected.txt:
* Source/WebCore/bindings/js/SerializedScriptValue.cpp:
(WebCore::SerializedScriptValue::deserialize):
* Source/WebCore/bindings/js/SerializedScriptValue.h:
* Source/WebCore/dom/BroadcastChannel.cpp:
(WebCore::BroadcastChannel::dispatchMessage):
* Source/WebCore/dom/MessageEvent.cpp:
(WebCore::MessageEvent::create):
* Source/WebCore/dom/MessageEvent.h:
* Source/WebCore/dom/MessagePort.cpp:
(WebCore::MessagePort::dispatchMessages):
* Source/WebCore/dom/MessagePort.idl:
* Source/WebCore/html/HTMLAttributeNames.in:
* Source/WebCore/page/DOMWindow.cpp:
(WebCore::DOMWindow::postMessage):
* Source/WebCore/page/WindowEventHandlers.idl:
* Source/WebCore/workers/DedicatedWorkerGlobalScope.idl:
* Source/WebCore/workers/Worker.idl:
* Source/WebCore/workers/WorkerMessagingProxy.cpp:
(WebCore::WorkerMessagingProxy::postMessageToWorkerObject):
(WebCore::WorkerMessagingProxy::postMessageToWorkerGlobalScope):
* Source/WebCore/workers/service/ServiceWorkerContainer.cpp:
(WebCore::ServiceWorkerContainer::startMessages):
(WebCore::ServiceWorkerContainer::postMessage):
* Source/WebCore/workers/service/ServiceWorkerContainer.h:
* Source/WebCore/workers/service/context/ServiceWorkerThread.cpp:
(WebCore::fireMessageEvent):

Canonical link: https://commits.webkit.org/256896@main

904a8fd

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

[webkit-early-warning-system]

EWS run on current version of this PR (hash 68cc200)

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 68cc200)

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash cc31a22)

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash cc31a22)

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

[webkit-early-warning-system]

EWS run on current version of this PR (hash 904a8fd)

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

[webkit-early-warning-system]

Starting EWS tests for 904a8fd. Live statuses available at the PR page, #6654

[webkit-early-warning-system]

EWS run on current version of this PR (hash 904a8fd)

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

[darinadler]

Code seems slightly repetitive. I might suggest some helpers so the different flavors of postMessage and dispatchMessage can share more, but not sure if that would be good in practice.

[webkit-commit-queue]

Committed 256896@main (5e2beb5): https://commits.webkit.org/256896@main

Reviewed commits have been landed. Closing PR #6654 and removing active labels.