WebPageProxy::installViewStateChangeCompletionHandler was only used by IOS.
Created attachment 243079 [details]
That's not true, it's PLATFORM(MAC) code.
But should be totally viable and usable on all PLATFORM(COCOA) platforms.
Created attachment 243083 [details]
Created attachment 243084 [details]
Comment on attachment 243084 [details]
Clearing flags on attachment: 243084
Committed r177123: <http://trac.webkit.org/changeset/177123>
All reviewed patches have been landed. Closing bug.