Due to bug 262818, os_signpost calls in WebContent no longer work in iOS. This is because os_signpost are emitted via logd, and we blocked WebContent from talking to logd in that commit.
rdar://117593169
Pull request: https://github.com/WebKit/WebKit/pull/20125
Committed 270471@main (2242351e265d): <https://commits.webkit.org/270471@main> Reviewed commits have been landed. Closing PR #20125 and removing active labels.