WebGL has unfinished context sharing feature It makes the code overly complex. It's not going to be specified. The code should be removed.
<rdar://problem/113735088>
Pull request: https://github.com/WebKit/WebKit/pull/16598
Committed 266910@main (1bce7e57fc29): <https://commits.webkit.org/266910@main> Reviewed commits have been landed. Closing PR #16598 and removing active labels.