Add additional telemetry to WebContent sandbox on macOS.
Created attachment 422950 [details] Patch
Created attachment 422952 [details] Patch
Comment on attachment 422952 [details] Patch r=me
Created attachment 422955 [details] Patch
Comment on attachment 422955 [details] Patch r=me
<rdar://75290553>
Created attachment 422957 [details] Patch
Landed <https://trac.webkit.org/changeset/274295/webkit>.