[Devtools] Removed NetworkRequest dependency on NetworkManager

third_party/WebKit/Source/devtools/front_end/sdk/ResourceTreeModel.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 46 matching lines @@
     this.mainFrame = null;
 
     this._agent.getResourceTree(this._processCachedResources.bind(this));
   }
 
   /**
    * @param {!SDK.NetworkRequest} request
    * @return {?SDK.ResourceTreeFrame}
    */
   static frameForRequest(request) {
-    var resourceTreeModel = request.networkManager().target().model(SDK.ResourceTreeModel);
+    var networkManager = SDK.NetworkManager.managerForRequest(request);
+    var resourceTreeModel = networkManager ? networkManager.target().model(SDK.ResourceTreeModel) : null;
     if (!resourceTreeModel)
       return null;
     return resourceTreeModel.frameForId(request.frameId);
   }
 
   /**
    * @return {!Array.<!SDK.ResourceTreeFrame>}
    */
   static frames() {
     var result = [];
@@ skipping 821 matching lines @@
     this._resourceTreeModel.dispatchEventToListeners(SDK.ResourceTreeModel.Events.InterstitialHidden);
   }
 
   /**
    * @override
    */
   navigationRequested() {
     // Frontend is not interested in when navigations are requested.
   }
 };