With UI-side compositing, inspector highlights don't show up until a window resize on macOS, because RemoteLayerTreeDrawingArea::m_viewSize is the empty rect, so the visibleRect is empty.
Pull request: https://github.com/WebKit/WebKit/pull/7244
<rdar://problem/103055587>
Committed 257488@main (582ab7ce73b7): <https://commits.webkit.org/257488@main> Reviewed commits have been landed. Closing PR #7244 and removing active labels.