Remove OffscreenCanvasEnabled from DeprecatedGlobalSettings

[nt1m]

ad0f017

Remove OffscreenCanvasEnabled from DeprecatedGlobalSettings
https://bugs.webkit.org/show_bug.cgi?id=250177
rdar://103943700

Reviewed by Ryosuke Niwa.

Use EnabledBySetting instead of EnabledByDeprecatedGlobalSetting.

* Source/WTF/Scripts/Preferences/UnifiedWebPreferences.yaml:
* Source/WebCore/html/HTMLCanvasElement.idl:
* Source/WebCore/html/OffscreenCanvas.idl:
* Source/WebCore/html/canvas/OffscreenCanvasRenderingContext2D.idl:
* Source/WebCore/page/DeprecatedGlobalSettings.h:
(WebCore::DeprecatedGlobalSettings::setOffscreenCanvasEnabled): Deleted.
(WebCore::DeprecatedGlobalSettings::offscreenCanvasEnabled): Deleted.

Canonical link: https://commits.webkit.org/258532@main

a54d977

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	❌ 🛠 🧪 win
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	🛠 gtk	✅ 🛠 wincairo
✅ 🧪 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
✅ 🛠 🧪 merge	✅ 🛠 watch-sim		✅ 🧪 jsc-mips-tests

[webkit-early-warning-system]

EWS run on current version of this PR (hash a54d977)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	❌ 🛠 🧪 win
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	🛠 gtk	✅ 🛠 wincairo
✅ 🧪 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
✅ 🛠 🧪 merge	✅ 🛠 watch-sim		✅ 🧪 jsc-mips-tests

[webkit-commit-queue]

Committed 258532@main (ad0f017): https://commits.webkit.org/258532@main

Reviewed commits have been landed. Closing PR #8284 and removing active labels.