bluetooth: Add descriptor list to DeviceDetailsPage on internals page.

chrome/browser/resources/bluetooth_internals/expandable_list.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.
 
 /**
  * Javascript for ExpandableList and ExpandableListItem, served from
  *     chrome://bluetooth-internals/.
  */
 
 cr.define('expandable_list', function() {
@@ skipping 66 matching lines @@
       this.emptyMessage_.classList.add('empty-message');
       this.emptyMessage_.hidden = true;
       this.insertBefore(this.emptyMessage_, this.firstChild);
 
       this.spinner_ = document.createElement('div');
       this.spinner_.classList.add('spinner');
       this.insertBefore(this.spinner_, this.firstChild);
 
       this.autoExpands = true;
       this.boundUpdateMessage_ = this.updateMessageDisplay_.bind(this);
-      this.setLoading(true);
+      this.setSpinnerShowing(true);
     },
 
     /**
      * Sets the data model of the list.
      * @param {cr.ui.ArrayDataModel} data
      */
     setData: function(data) {
       if (this.dataModel)
         this.dataModel.removeEventListener('splice', this.boundUpdateMessage_);
 
       this.dataModel = data;
       this.dataModel.addEventListener('splice', this.boundUpdateMessage_);
       this.updateMessageDisplay_();
     },
 
     /**
      * Sets the empty message text.
      * @param {string} message
      */
     setEmptyMessage: function(message) {
       this.emptyMessage_.textContent = message;
     },
 
     /**
-     * Sets the loading state of the list. If |loading| is true, the loading
+     * Sets the spinner display state. If |showing| is true, the loading
      * spinner is dispayed.
-     * @param {boolean} loading
+     * @param {boolean} showing
      */
-    setLoading: function(loading) {
-      this.spinner_.hidden = !loading;
+    setSpinnerShowing: function(showing) {
+      this.spinner_.hidden = !showing;
     },
 
     /**
-     * Gets the loading state of the list. Returns true if the list is loading.
+     * Gets the spinner display state. Returns true if the spinner is showing.
      * @return {boolean}
      */
-    isLoading: function() {
+    isSpinnerShowing: function() {
       return !this.spinner_.hidden;
     },
 
     /**
      * Updates the display state of the empty message. If there are no items in
      * the data model, the empty message is displayed.
      */
     updateMessageDisplay_: function() {
       this.emptyMessage_.hidden = this.dataModel.length > 0;
     },
   };
 
   return {
     ExpandableListItem: ExpandableListItem,
     ExpandableList: ExpandableList,
   }
 });