We currently store `display: contents` RenderStyle objects on Element. In order to implement support for animating the `display` property, we'll need to be able to do something similar so that we may return those styles under `Element::existingComputedStyle()`.
Pull request: https://github.com/WebKit/WebKit/pull/22902
Committed 273288@main (519c7ed4ac75): <https://commits.webkit.org/273288@main> Reviewed commits have been landed. Closing PR #22902 and removing active labels.
<rdar://problem/121357311>