Unreviewed build fix 6/3

[mwyrzykowski]

8c7a3b2

Unreviewed build fix 6/3
https://bugs.webkit.org/show_bug.cgi?id=316209
radar://178638005

Unreviewed, header needs angle bracket include

* Source/WebCore/Modules/webxr/XRLayerBacking.h:

Canonical link: https://commits.webkit.org/314475@main

50757e7

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
✅ 🛠 🧪 unsafe-merge	🧪 vision-wk2	🧪 mac-intel-wk2
	✅ 🛠 tv	✅ 🛠 mac-safer-cpp
	✅ 🛠 tv-sim	🧪 mac-site-isolation
	🛠 watch
	🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash 50757e7)

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
✅ 🛠 🧪 unsafe-merge	🧪 vision-wk2	🧪 mac-intel-wk2
	✅ 🛠 tv	✅ 🛠 mac-safer-cpp
	✅ 🛠 tv-sim	🧪 mac-site-isolation
	🛠 watch
	🛠 watch-sim

[webkit-commit-queue]

Committed 314475@main (8c7a3b2): https://commits.webkit.org/314475@main

Reviewed commits have been landed. Closing PR #66378 and removing active labels.