Add browserbench.org/Speedometer3.0-preview.
Pull request: https://github.com/WebKit/WebKit/pull/24448
Committed 274656@main (9458b1b53cdd): <https://commits.webkit.org/274656@main> Reviewed commits have been landed. Closing PR #24448 and removing active labels.
<rdar://problem/122967098>
Re-opened since this is blocked by bug 269422
Pull request: https://github.com/WebKit/WebKit/pull/24472
Committed 274685@main (562e657d155f): <https://commits.webkit.org/274685@main> Reviewed commits have been landed. Closing PR #24472 and removing active labels.