DevTools: Create target per each worker behind experiment

Source/devtools/front_end/InspectorBackend.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 86 matching lines @@
             throw "Main connection was not initialized";
         return this._connection;
     },
 
     /**
      * @param {!InspectorBackendClass.MainConnection} connection
      */
     setConnection: function(connection)
     {
         this._connection = connection;
-        this._connection.initialize(this._agentPrototypes, this._dispatcherPrototypes);
 
         this._connection.registerAgentsOn(window);
         for (var type in this._enums) {
             var domainAndMethod = type.split(".");
             window[domainAndMethod[0] + "Agent"][domainAndMethod[1]] = this._enums[type];
         }
     },
 
     /**
      * @param {string} domain
@@ skipping 215 matching lines @@
  *  @constructor
  *  @extends {WebInspector.Object}
  */
 InspectorBackendClass.Connection = function()
 {
     this._lastMessageId = 1;
     this._pendingResponsesCount = 0;
     this._agents = {};
     this._dispatchers = {};
     this._callbacks = {};
+    this._initialize(InspectorBackend._agentPrototypes, InspectorBackend._dispatcherPrototypes);
 }
 
 InspectorBackendClass.Connection.Events = {
     Disconnected: "Disconnected",
 }
 
 InspectorBackendClass.Connection.prototype = {
 
     /**
      * @param {!Object.<string, !InspectorBackendClass.AgentPrototype>} agentPrototypes
      * @param {!Object.<string, !InspectorBackendClass.DispatcherPrototype>} dispatcherPrototypes
      */
-    initialize: function(agentPrototypes, dispatcherPrototypes)
+    _initialize: function(agentPrototypes, dispatcherPrototypes)
     {
         for (var domain in agentPrototypes) {
             this._agents[domain] = Object.create(agentPrototypes[domain]);
             this._agents[domain].setConnection(this);
         }
 
         for (var domain in dispatcherPrototypes)
             this._dispatchers[domain] = Object.create(dispatcherPrototypes[domain])
 
     },
@@ skipping 494 matching lines @@
     }
 
 }
 
 InspectorBackendClass.Options = {
     dumpInspectorTimeStats: false,
     dumpInspectorProtocolMessages: false
 }
 
 InspectorBackend = new InspectorBackendClass();