A message targeted at a page should not be sent to all processes in a context.
Created attachment 159754 [details] proposed patch
You should add an API test.
Committed <http://trac.webkit.org/changeset/126311>. Support for the new message has been added to TestWebKitAPI.
(In reply to comment #3) > Committed <http://trac.webkit.org/changeset/126311>. > > Support for the new message has been added to TestWebKitAPI. Thank you Alexey!