Reviewed by Maciej.

    Reviewed by Maciej.

        Bug 9686: [Drosera] Need the ability to break into Drosera on Javascript exceptions
        http://bugzilla.opendarwin.org/show_bug.cgi?id=9686

        * Drosera/DebuggerDocument.m:
        (-[WebScriptObject switchToServerNamed:]): Remove as listener before resuming to
        ensure that the server does not try and notify us of events related to the resumption.
        (-[WebScriptObject webView:exceptionWasRaised:sourceId:line:forWebFrame:]): Delegate
        call through to JavaScript.
        * Drosera/debugger.js: Pause debugger when exception is raised.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@15701 268f45cc-cd09-0410-ab3c-d52691b4dbfc