DevTools: introduce multitarget model listeners

Source/devtools/front_end/ScreencastView.js

 /*
  * Copyright (C) 2013 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 912 matching lines @@
         return true;
     },
 
   __proto__: WebInspector.VBox.prototype
 }
 
 /**
  * @param {!Element} element
  * @constructor
  */
-WebInspector.ScreencastView.ProgressTracker = function(element) {
+WebInspector.ScreencastView.ProgressTracker = function(element)
+{
     this._element = element;
 
-    WebInspector.resourceTreeModel.addEventListener(WebInspector.ResourceTreeModel.EventTypes.MainFrameNavigated, this._onMainFrameNavigated, this);
-    WebInspector.resourceTreeModel.addEventListener(WebInspector.ResourceTreeModel.EventTypes.Load, this._onLoad, this);
-
-    WebInspector.networkManager.addEventListener(WebInspector.NetworkManager.EventTypes.RequestStarted, this._onRequestStarted, this);
-    WebInspector.networkManager.addEventListener(WebInspector.NetworkManager.EventTypes.RequestFinished, this._onRequestFinished, this);
-};
+    WebInspector.targetManager.addModelListener(WebInspector.ResourceTreeModel, WebInspector.ResourceTreeModel.EventTypes.MainFrameNavigated, this._onMainFrameNavigated, this);
+    WebInspector.targetManager.addModelListener(WebInspector.ResourceTreeModel, WebInspector.ResourceTreeModel.EventTypes.Load, this._onLoad, this);
+    WebInspector.targetManager.addModelListener(WebInspector.NetworkManager, WebInspector.NetworkManager.EventTypes.RequestStarted, this._onRequestStarted, this);
+    WebInspector.targetManager.addModelListener(WebInspector.NetworkManager, WebInspector.NetworkManager.EventTypes.RequestFinished, this._onRequestFinished, this);
+}
 
 WebInspector.ScreencastView.ProgressTracker.prototype = {
     _onMainFrameNavigated: function()
     {
         this._requestIds = {};
         this._startedRequests = 0;
         this._finishedRequests = 0;
         this._maxDisplayedProgress = 0;
         this._updateProgress(0.1);  // Display first 10% on navigation start.
     },
@@ skipping 46 matching lines @@
           return;
         this._maxDisplayedProgress = progress;
         this._displayProgress(progress);
     },
 
     _displayProgress: function(progress)
     {
         this._element.style.width = (100 * progress) + "%";
     }
 };