Build Fix for RealitySystemSupport
<rdar://problem/110872747>
Pull request: https://github.com/WebKit/WebKit/pull/15033
Committed 265253@main (a1509bd159ad): <https://commits.webkit.org/265253@main> Reviewed commits have been landed. Closing PR #15033 and removing active labels.
Re-opening for pull request https://github.com/WebKit/WebKit/pull/15067
Committed 265270@main (61f6d2d21bc5): <https://commits.webkit.org/265270@main> Reviewed commits have been landed. Closing PR #15067 and removing active labels.