MediaControlTextTrackContainerElement uses Image redundantly, should use NativeImage
<rdar://problem/115709836>
Pull request: https://github.com/WebKit/WebKit/pull/17902
Committed 268188@main (0e4fcb51c798): <https://commits.webkit.org/268188@main> Reviewed commits have been landed. Closing PR #17902 and removing active labels.