DevTools: refactoring connection creation, removing a couple of dead code branches.

Source/devtools/front_end/sdk/WorkerManager.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 155 matching lines @@
 
 /**
  * @type {!WebInspector.WorkerManager}
  */
 WebInspector.workerManager;
 
 /**
  * @constructor
  * @extends {InspectorBackendClass.Connection}
  * @param {string} workerId
- * @param {function(!InspectorBackendClass.Connection)} onConnectionReady
  */
-WebInspector.ExternalWorkerConnection = function(workerId, onConnectionReady)
+WebInspector.ExternalWorkerConnection = function(workerId)
 {
     InspectorBackendClass.Connection.call(this);
     this._workerId = workerId;
     window.addEventListener("message", this._processMessage.bind(this), true);
-    onConnectionReady(this);
 }
 
 WebInspector.ExternalWorkerConnection.prototype = {
 
     /**
      * @param {?Event} event
      */
     _processMessage: function(event)
     {
         if (!event)
             return;
 
         var message = event.data;
         this.dispatch(message);
     },
 
     /**
      * @param {!Object} messageObject
      */
     sendMessage: function(messageObject)
     {
         window.opener.postMessage({workerId: this._workerId, command: "sendMessageToBackend", message: messageObject}, "*");
     },
 
     __proto__: InspectorBackendClass.Connection.prototype
 }