Import the Web Platform Tests for Deprecation Reporting, create a new Experimental Feature to represent the work, and provide a stub implementation of the report.
<rdar://problem/99988574>
Pull request: https://github.com/WebKit/WebKit/pull/4409
Pull request: https://github.com/Webkit/WebKit/pull/4409
Committed 254634@main (a01206bce956): <https://commits.webkit.org/254634@main> Reviewed commits have been landed. Closing PR #4409 and removing active labels.