[DevTools] Simplify selection restoration logic

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

 /*
  * Copyright (C) 2007, 2008, 2010 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 22 matching lines @@
  */
 Resources.ApplicationPanelSidebar = class extends UI.VBox {
   /**
    * @param {!Resources.ResourcesPanel} panel
    */
   constructor(panel) {
     super();
 
     this._panel = panel;
 
-    this._shouldRestoreSelection = true;
-
     this._sidebarTree = new UI.TreeOutlineInShadow();
     this._sidebarTree.element.classList.add('resources-sidebar');
     this._sidebarTree.registerRequiredCSS('resources/resourcesSidebar.css');
     this._sidebarTree.element.classList.add('filter-all');
     // Listener needs to have been set up before the elements are added
     this._sidebarTree.addEventListener(UI.TreeOutline.Events.ElementAttached, this._treeElementAdded, this);
 
     this.contentElement.appendChild(this._sidebarTree.element);
     this._applicationTreeElement = this._addSidebarSection(Common.UIString('Application'));
     this._manifestTreeElement = new Resources.AppManifestTreeElement(panel);
@@ skipping 51 matching lines @@
     this._domStorageTreeElements = new Map();
     /** @type {!Object.<string, boolean>} */
     this._domains = {};
 
     this._sidebarTree.contentElement.addEventListener('mousemove', this._onmousemove.bind(this), false);
     this._sidebarTree.contentElement.addEventListener('mouseleave', this._onmouseleave.bind(this), false);
 
     SDK.targetManager.observeTargets(this);
     SDK.targetManager.addModelListener(
         SDK.ResourceTreeModel, SDK.ResourceTreeModel.Events.FrameNavigated, this._frameNavigated, this);
-    SDK.targetManager.addModelListener(
-        SDK.ResourceTreeModel, SDK.ResourceTreeModel.Events.WillReloadPage, this._willReloadPage, this);
 
     var selection = this._panel.lastSelectedItemPath();
-    if (this._shouldRestoreSelection && !selection.length)
+    if (!selection.length)
       this._manifestTreeElement.select();
   }
 
   /**
    * @param {string} title
    * @return {!UI.TreeElement}
    */
   _addSidebarSection(title) {
     var treeElement = new UI.TreeElement(title, true);
     treeElement.listItemElement.classList.add('storage-group-list-item');
@@ skipping 95 matching lines @@
     this.databasesListTreeElement.removeChildren();
     this.databasesListTreeElement.setExpandable(false);
   }
 
   _resetAppCache() {
     for (var frameId of Object.keys(this._applicationCacheFrameElements))
       this._applicationCacheFrameManifestRemoved({data: frameId});
     this.applicationCacheListTreeElement.setExpandable(false);
   }
 
-  _willReloadPage() {
-    this._shouldRestoreSelection = true;
-  }
-
   /**
    * @param {!Common.Event} event
    */
   _treeElementAdded(event) {
-    if (!this._shouldRestoreSelection)
-      return;
     var selection = this._panel.lastSelectedItemPath();
     if (!selection.length)
       return;
     var element = event.data;
     var index = selection.indexOf(element.itemURL);
     if (index < 0)
       return;
     for (var parent = element.parent; parent; parent = parent.parent)
       parent.expand();
     if (index > 0)
       element.expand();
     element.select();
-    if (index === 0)
-      this._shouldRestoreSelection = false;
   }
 
   _reset() {
     this._domains = {};
     this._resetWebSQL();
     this.cookieListTreeElement.removeChildren();
   }
 
   _frameNavigated(event) {
     var frame = event.data;
@@ skipping 1383 matching lines @@
 
     this.element.classList.add('storage-view');
     this._emptyWidget = new UI.EmptyWidget('');
     this._emptyWidget.show(this.element);
   }
 
   setText(text) {
     this._emptyWidget.text = text;
   }
 };