DevTools: Create target per each worker behind experiment

Source/devtools/front_end/Target.js

 /*
  * Copyright 2014 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /**
  * @constructor
  * @extends {Protocol.Agents}
  * @param {!InspectorBackendClass.Connection} connection
  * @param {function(!WebInspector.Target)=} callback
  */
 WebInspector.Target = function(connection, callback)
 {
     Protocol.Agents.call(this, connection.agentsMap());
     this._connection = connection;
     this.isMainFrontend = false;
 
     this.pageAgent().canScreencast(this._initializeCapability.bind(this, "canScreencast", null));
     this.workerAgent().canInspectWorkers(this._initializeCapability.bind(this, "isMainFrontend", this._loadedWithCapabilities.bind(this, callback)));
 }
 
 WebInspector.Target.prototype = {
 
     _initializeCapability: function(name, callback, error, result)
     {
         this[name] = result;
-        Capabilities[name] = result;
+        if (!Capabilities[name])
+            Capabilities[name] = result;
         if (callback)
             callback();
     },
 
     /**
      * @param {function(!WebInspector.Target)=} callback
      */
     _loadedWithCapabilities: function(callback)
     {
         this.consoleModel = new WebInspector.ConsoleModel(this);
         //This and similar lines are needed for compatibility
-        WebInspector.console = this.consoleModel;
+        if (!WebInspector.console)
+            WebInspector.console = this.consoleModel;
+
         this.networkManager = new WebInspector.NetworkManager(this);
-        WebInspector.networkManager = this.networkManager;
+        if (!WebInspector.networkManager)
+            WebInspector.networkManager = this.networkManager;
+
         this.resourceTreeModel = new WebInspector.ResourceTreeModel(this);
-        WebInspector.resourceTreeModel = this.resourceTreeModel;
+        if (!WebInspector.resourceTreeModel)
+            WebInspector.resourceTreeModel = this.resourceTreeModel;
+
         this.debuggerModel = new WebInspector.DebuggerModel(this);
-        WebInspector.debuggerModel = this.debuggerModel;
+        if (!WebInspector.debuggerModel)
+            WebInspector.debuggerModel = this.debuggerModel;
+
         this.runtimeModel = new WebInspector.RuntimeModel(this);
-        WebInspector.runtimeModel = this.runtimeModel;
+        if (!WebInspector.runtimeModel)
+            WebInspector.runtimeModel = this.runtimeModel;
 
         //we can't name it domAgent, because it clashes with function, WebInspector.DOMAgent should be renamed to DOMModel
         this.domModel = new WebInspector.DOMAgent();
-        WebInspector.domAgent = this.domModel;
+        if (!WebInspector.domAgent)
+            WebInspector.domAgent = this.domModel;
+
         this.workerManager = new WebInspector.WorkerManager(this.isMainFrontend);
-        WebInspector.workerManager = this.workerManager;
+        if (!WebInspector.workerManager)
+            WebInspector.workerManager = this.workerManager;
 
         if (callback)
             callback(this);
     },
 
     /**
      * @override
      * @param {string} domain
      * @param {!Object} dispatcher
      */
@@ skipping 28 matching lines @@
      * @param {!InspectorBackendClass.Connection} connection
      * @param {function(!WebInspector.Target)=} callback
      */
     createTarget: function(connection, callback)
     {
         var newTarget = new WebInspector.Target(connection, callback);
         this._targets.push(newTarget);
     }
 
 }