[DevTools] Resources panel SideBarTreeElement should show expand/collapse option only if it has chi…

Source/devtools/front_end/ResourcesPanel.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 123 matching lines @@
         WebInspector.Panel.prototype.wasShown.call(this);
         this._initialize();
     },
 
     _initialize: function()
     {
         if (!this._initialized && this.isShowing() && this._cachedResourcesWereLoaded) {
             this._populateResourceTree();
             this._populateDOMStorageTree();
             this._populateApplicationCacheTree();
+            this.indexedDBListTreeElement._initialize();
+            if (WebInspector.experimentsSettings.fileSystemInspection.isEnabled())
+                this.fileSystemListTreeElement._initialize();
             this._initDefaultSelection();
             this._initialized = true;
         }
     },
 
     _loadEventFired: function()
     {
         this._initDefaultSelection();
     },
 
@@ skipping 915 matching lines @@
     __proto__: TreeElement.prototype
 }
 
 /**
  * @constructor
  * @extends {WebInspector.BaseStorageTreeElement}
  * @param {boolean=} noIcon
  */
 WebInspector.StorageCategoryTreeElement = function(storagePanel, categoryName, settingsKey, iconClasses, noIcon)
 {
-    WebInspector.BaseStorageTreeElement.call(this, storagePanel, null, categoryName, iconClasses, true, noIcon);
+    WebInspector.BaseStorageTreeElement.call(this, storagePanel, null, categoryName, iconClasses, false, noIcon);
     this._expandedSettingKey = "resources" + settingsKey + "Expanded";
     WebInspector.settings[this._expandedSettingKey] = WebInspector.settings.createSetting(this._expandedSettingKey, settingsKey === "Frames");
     this._categoryName = categoryName;
 }
 
 WebInspector.StorageCategoryTreeElement.prototype = {
     get itemURL()
     {
         return "category://" + this._categoryName;
     },
@@ skipping 386 matching lines @@
  * @constructor
  * @extends {WebInspector.StorageCategoryTreeElement}
  * @param {WebInspector.ResourcesPanel} storagePanel
  */
 WebInspector.IndexedDBTreeElement = function(storagePanel)
 {
     WebInspector.StorageCategoryTreeElement.call(this, storagePanel, WebInspector.UIString("IndexedDB"), "IndexedDB", ["indexed-db-storage-tree-item"]);
 }
 
 WebInspector.IndexedDBTreeElement.prototype = {
-    onexpand: function()
+    _initialize: function()
     {
-        WebInspector.StorageCategoryTreeElement.prototype.onexpand.call(this);
-        if (!this._indexedDBModel)
-            this._createIndexedDBModel();
+        this._createIndexedDBModel();
     },
 
     onattach: function()
     {
         WebInspector.StorageCategoryTreeElement.prototype.onattach.call(this);
         this.listItemElement.addEventListener("contextmenu", this._handleContextMenuEvent.bind(this), true);
     },
 
     _handleContextMenuEvent: function(event)
     {
@@ skipping 90 matching lines @@
  * @constructor
  * @extends {WebInspector.StorageCategoryTreeElement}
  * @param {WebInspector.ResourcesPanel} storagePanel
  */
 WebInspector.FileSystemListTreeElement = function(storagePanel)
 {
     WebInspector.StorageCategoryTreeElement.call(this, storagePanel, WebInspector.UIString("FileSystem"), "FileSystem", ["file-system-storage-tree-item"]);
 }
 
 WebInspector.FileSystemListTreeElement.prototype = {
-    onexpand: function()
+    _initialize: function()
     {
-        WebInspector.StorageCategoryTreeElement.prototype.onexpand.call(this);
         this._refreshFileSystem();
     },
 
     onattach: function()
     {
         WebInspector.StorageCategoryTreeElement.prototype.onattach.call(this);
         this.listItemElement.addEventListener("contextmenu", this._handleContextMenuEvent.bind(this), true);
     },
 
     _handleContextMenuEvent: function(event)
@@ skipping 740 matching lines @@
      */
     _lastTreeElement: function()
     {
         var treeElement = this._root;
         var nextTreeElement;
         while (nextTreeElement = this._traverseNext(treeElement))
             treeElement = nextTreeElement;
         return treeElement;
     }
 }