<rdar://problem/13334446> [Mac] Tweak sandbox profile.

        Apply a post-landing review comment.

        * NetworkProcess/mac/com.apple.WebKit.NetworkProcess.sb.in:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148297 268f45cc-cd09-0410-ab3c-d52691b4dbfc