Add support for `Clear-Site-Data: "executionContext"`: - https://w3c.github.io/webappsec-clear-site-data/#grammardef-executioncontexts
Pull request: https://github.com/WebKit/WebKit/pull/9720
Committed 259940@main (35591d243359): <https://commits.webkit.org/259940@main> Reviewed commits have been landed. Closing PR #9720 and removing active labels.
<rdar://problem/105116173>