It is sufficient to make {Network, Web}ProcessProxy inherit from ProcessThrottleClient privately instead of publicly. The callbacks described by ProcessThrottleClient should only be called by ProcessThrottler.
Created attachment 252897 [details] Patch
Comment on attachment 252897 [details] Patch Clearing flags on attachment: 252897 Committed r184223: <http://trac.webkit.org/changeset/184223>
All reviewed patches have been landed. Closing bug.