Fixes issues after review

JitsiConference.js

     conference.room.addListener(XMPPEvents.CONNECTION_RESTORED, function () {
         conference.eventEmitter.emit(JitsiConferenceEvents.CONNECTION_RESTORED);
     });
-    conference.room.addListener(XMPPEvents.CONFERENCE_SETUP_FAILED, function () {
-        conference.eventEmitter.emit(JitsiConferenceEvents.CONFERENCE_FAILED, JitsiConferenceErrors.SETUP_FAILED);
+    conference.room.addListener(XMPPEvents.CONFERENCE_SETUP_FAILED,
+    function (error) {
+        conference.eventEmitter.emit(JitsiConferenceEvents.CONFERENCE_FAILED,
+            JitsiConferenceErrors.SETUP_FAILED, error);
     });
 
     conference.room.addListener(AuthenticationEvents.IDENTITY_UPDATED, function (authEnabled, authIdentity) {
             function (pc) {
                 conference.statistics.sendIceConnectionFailedEvent(pc);
                 conference.room.eventEmitter.emit(
-                    XMPPEvents.CONFERENCE_SETUP_FAILED);
+                    XMPPEvents.CONFERENCE_SETUP_FAILED,
+                    new Error("ICE fail")); 
             });
 
         conference.rtc.addListener(RTCEvents.TRACK_ATTACHED,

modules/util/GlobalOnErrorHandler.js

         var errHandler = window.onerror;
         if(!errHandler)
             return;
-        errHandler.call(null, null, null, null, null, error);
+        errHandler(null, null, null, null, error);
     },
     /**
      * Calls the global rejection handler if there is one.
         var errHandler = window.onunhandledrejection;
         if(!errHandler)
             return;
-        errHandler.call(null, error);
+        errHandler(error);
     }
 };
 

modules/xmpp/JingleSessionPC.js

 
 JingleSessionPC.onJingleFatalError = function (session, error)
 {
-    this.room.eventEmitter.emit(XMPPEvents.CONFERENCE_SETUP_FAILED);
+    this.room.eventEmitter.emit(XMPPEvents.CONFERENCE_SETUP_FAILED, error);
     this.room.eventEmitter.emit(XMPPEvents.JINGLE_FATAL_ERROR, session, error);
 };