Reviewed by Beth Dakin.

        Add Connection::waitForAndDispatchImmediately
        https://bugs.webkit.org/show_bug.cgi?id=52841

        * Platform/CoreIPC/Connection.h:
        (CoreIPC::Connection::waitForAndDispatchImmediately):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76280 268f45cc-cd09-0410-ab3c-d52691b4dbfc