Following Bug 247926 we no longer attached SampleBufferContentKeySessionSupportEnabled to the WebCore::DeprecatedGlobalSettings object.
<rdar://problem/104044710>
Pull request: https://github.com/Webkit/WebKit/pull/8413
Committed 258734@main (14816ea69ff9): <https://commits.webkit.org/258734@main> Reviewed commits have been landed. Closing PR #8413 and removing active labels.