[DevTools] Restore tree selection after reload

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

 // Copyright 2017 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.
 
 Resources.ResourcesPanel = class extends UI.PanelWithSidebar {
   constructor() {
     super('resources');
     this.registerRequiredCSS('resources/resourcesPanel.css');
 
-    this._resourcesLastSelectedItemSetting = Common.settings.createSetting('resourcesLastSelectedItem', '');
+    this._resourcesLastSelectedItemSetting = Common.settings.createSetting('resourcesLastSelectedElementPath', []);
 
     /** @type {?UI.Widget} */
     this.visibleView = null;
 
     /** @type {?Resources.StorageCategoryView} */
     this._categoryView = null;
 
     var mainContainer = new UI.VBox();
     this.storageViews = mainContainer.element.createChild('div', 'vbox flex-auto');
     this._storageViewToolbar = new UI.Toolbar('resources-toolbar', mainContainer.element);
@@ skipping 32 matching lines @@
   }
 
   /**
    * @override
    */
   focus() {
     this._sidebar.focus();
   }
 
   /**
-   * @return {string}
+   * @return {!Array<string>}
    */
-  lastSelectedItemURL() {
+  lastSelectedItemPath() {
     return this._resourcesLastSelectedItemSetting.get();
   }
 
-  setLastSelectedItemURL(url) {
-    this._resourcesLastSelectedItemSetting.set(url);
+  /**
+   * @param {!Array<string>} path
+   */
+  setLastSelectedItemPath(path) {
+    this._resourcesLastSelectedItemSetting.set(path);
   }
 
   resetView() {
     if (this.visibleView && Resources.ResourcesPanel._shouldCloseOnReset(this.visibleView))
       this.showView(null);
   }
 
   /**
    * @param {?UI.Widget} view
    */
@@ skipping 89 matching lines @@
    * @param {!Object} resource
    * @return {!Promise}
    */
   reveal(resource) {
     if (!(resource instanceof SDK.Resource))
       return Promise.reject(new Error('Internal error: not a resource'));
     var panel = Resources.ResourcesPanel._instance()._sidebar;
     return UI.viewManager.showView('resources').then(panel.showResource.bind(panel, resource));
   }
 };