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There are still a few interfaces left. They use the 'default implementation' feature that can't be replaced until we implement const constructor forwarding. Also removed mockimpl.dart. We don't pretend to support ReceiverPortFactory (whatever it is) if it is not in the core library. Review URL: https://chromiumcodereview.appspot.com//10917208 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@12252 260f80e4-7a28-3924-810f-c04153c831b5