MD Bookmarks: Scroll and select items that are added to the main list

chrome/browser/resources/md_bookmarks/store_client.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.
 
 /**
  * @fileoverview Defines StoreClient, a Polymer behavior to tie a front-end
  * element to back-end data from the store.
  */
 
 cr.define('bookmarks', function() {
@@ skipping 68 matching lines @@
 
     /** @param {string} newState */
     onStateChanged: function(newState) {
       this.watches_.forEach(function(watch) {
         var oldValue = this[watch.localProperty];
         var newValue = watch.valueGetter(newState);
 
         // Avoid poking Polymer unless something has actually changed. Reducers
         // must return new objects rather than mutating existing objects, so
         // any real changes will pass through correctly.
-        if (oldValue == newValue || newValue == undefined)
+        if (oldValue == newValue || newValue === undefined)
           return;
 
         this[watch.localProperty] = newValue;
       }.bind(this));
     },
 
     updateFromStore: function() {
       if (bookmarks.Store.getInstance().isInitialized())
         this.onStateChanged(bookmarks.Store.getInstance().data);
     },
 
     /** @return {!BookmarksPageState} */
     getState: function() {
       return bookmarks.Store.getInstance().data;
     },
   };
 
   return {
     StoreClient: StoreClient,
   };
 });