Adopt a smart pointer for ContentSecurityPolicy::m_scriptExecutionContext.
Pull request: https://github.com/WebKit/WebKit/pull/20121
Committed 270411@main (ebb8dea2e3a3): <https://commits.webkit.org/270411@main> Reviewed commits have been landed. Closing PR #20121 and removing active labels.
<rdar://problem/118144415>