A cmake block checks for USE_GSTREAMER_WEB_RTC, while the actual option name is USE_GSTREAMER_WEBRTC.
Pull request: https://github.com/WebKit/WebKit/pull/6302
Committed 256487@main (ee453765232d): <https://commits.webkit.org/256487@main> Reviewed commits have been landed. Closing PR #6302 and removing active labels.