[DevTools] Make resource tree model optional

third_party/WebKit/Source/devtools/front_end/resources/ServiceWorkersView.js

 // Copyright (c) 2015 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 {WebInspector.VBox}
  * @implements {WebInspector.TargetManager.Observer}
  */
 WebInspector.ServiceWorkersView = function()
@@ skipping 35 matching lines @@
         this._showAllCheckbox = new WebInspector.ToolbarCheckbox(WebInspector.UIString("Show all"), WebInspector.UIString("Show all Service Workers regardless of the origin"));
         this._showAllCheckbox.inputElement.addEventListener("change", this._updateSectionVisibility.bind(this), false);
         this._toolbar.appendToolbarItem(this._showAllCheckbox);
 
         for (var registration of this._manager.registrations().values())
             this._updateRegistration(registration);
 
         this._manager.addEventListener(WebInspector.ServiceWorkerManager.Events.RegistrationUpdated, this._registrationUpdated, this);
         this._manager.addEventListener(WebInspector.ServiceWorkerManager.Events.RegistrationDeleted, this._registrationDeleted, this);
         this._manager.addEventListener(WebInspector.ServiceWorkerManager.Events.RegistrationErrorAdded, this._registrationErrorAdded, this);
-        this._target.resourceTreeModel.addEventListener(WebInspector.ResourceTreeModel.EventTypes.SecurityOriginAdded, this._updateSectionVisibility, this);
-        this._target.resourceTreeModel.addEventListener(WebInspector.ResourceTreeModel.EventTypes.SecurityOriginRemoved, this._updateSectionVisibility, this);
+        var resourceTreeModel = WebInspector.ResourceTreeModel.fromTarget(this._target);

[dgozman, 2016/07/14 16:29:28]

ditto

[eostroukhov-old, 2016/07/20 23:46:15]

Done.

+        if (resourceTreeModel) {
+            resourceTreeModel.addEventListener(WebInspector.ResourceTreeModel.EventTypes.SecurityOriginAdded, this._updateSectionVisibility, this);
+            resourceTreeModel.addEventListener(WebInspector.ResourceTreeModel.EventTypes.SecurityOriginRemoved, this._updateSectionVisibility, this);
+        }
     },
 
     /**
      * @override
      * @param {!WebInspector.Target} target
      */
     targetRemoved: function(target)
     {
         if (target !== this._target)
             return;
         delete this._target;
     },
 
     _updateSectionVisibility: function()
     {
-        var securityOrigins = new Set(this._target.resourceTreeModel.securityOrigins());
+        var resourceTreeModel = WebInspector.ResourceTreeModel.fromTarget(this._target);
+        var securityOrigins = new Set(resourceTreeModel ? resourceTreeModel.securityOrigins() : []);
         for (var section of this._sections.values()) {
             var visible = this._showAllCheckbox.checked() || securityOrigins.has(section._registration.securityOrigin);
             section._section.element.classList.toggle("hidden", !visible);
         }
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _registrationUpdated: function(event)
@@ skipping 322 matching lines @@
         return contentElement;
     },
 
     _dispose: function()
     {
         this._linkifier.dispose();
         if (this._pendingUpdate)
             clearTimeout(this._pendingUpdate);
     }
 }