remove onnegotiationneeded

stops using onnegotiationneeded to create an offer.
This is wrong in the case of the answering peer and gets
triggered twice in Chrome due to bugs

lib/negotiator.js

@@ -48,9 +48,7 @@ Negotiator.startConnection = function(connection, options) {
       connection.initialize(dc);
     }
 
-    if (!util.supports.onnegotiationneeded) {
-      Negotiator._makeOffer(connection);
-    }
+    Negotiator._makeOffer(connection);
   } else {
     Negotiator.handleSDP("OFFER", connection, options.sdp);
   }
@@ -175,19 +173,6 @@ Negotiator._setupListeners = function(connection, pc, pc_id) {
   // Fallback for older Chrome impls.
   pc.onicechange = pc.oniceconnectionstatechange;
 
-  // ONNEGOTIATIONNEEDED (Chrome)
-  util.log("Listening for `negotiationneeded`");
-  pc.onnegotiationneeded = function() {
-    util.log("`negotiationneeded` triggered");
-    if (pc.signalingState == "stable") {
-      Negotiator._makeOffer(connection);
-    } else {
-      util.log(
-        "onnegotiationneeded triggered when not stable. Is another connection being established?"
-      );
-    }
-  };
-
   // DATACONNECTION.
   util.log("Listening for data channel");
   // Fired between offer and answer, so options should already be saved