Options: Remove the hidden class, since we override the hidden attribute to set

chrome/browser/resources/options/cookies_list.js

 // Copyright (c) 2011 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.
 
 cr.define('options', function() {
   const DeletableItemList = options.DeletableItemList;
   const DeletableItem = options.DeletableItem;
   const ArrayDataModel = cr.ui.ArrayDataModel;
   const ListSingleSelectionModel = cr.ui.ListSingleSelectionModel;
 
@@ skipping 83 matching lines @@
 
     /** @inheritDoc */
     decorate: function() {
       this.siteChild = this.ownerDocument.createElement('div');
       this.siteChild.className = 'cookie-site';
       this.dataChild = this.ownerDocument.createElement('div');
       this.dataChild.className = 'cookie-data';
       this.itemsChild = this.ownerDocument.createElement('div');
       this.itemsChild.className = 'cookie-items';
       this.infoChild = this.ownerDocument.createElement('div');
-      this.infoChild.className = 'cookie-details hidden';
+      this.infoChild.className = 'cookie-details';
+      this.infoChild.hidden = true;
       var remove = this.ownerDocument.createElement('button');
       remove.textContent = localStrings.getString('remove_cookie');
       remove.onclick = this.removeCookie_.bind(this);
       this.infoChild.appendChild(remove);
       var content = this.contentElement;
       content.appendChild(this.siteChild);
       content.appendChild(this.dataChild);
       content.appendChild(this.itemsChild);
       this.itemsChild.appendChild(this.infoChild);
       if (this.origin && this.origin.data) {
@@ skipping 115 matching lines @@
     },
 
     /**
      * Updates the items section to reflect changes, animating to the new state.
      * Removes existing contents and calls @{code CookieTreeNode.createItems}.
      * @private
      */
     updateItems_: function() {
       this.disableAnimation_();
       this.itemsChild.textContent = '';
-      this.infoChild.classList.add('hidden');
+      this.infoChild.hidden = true;
       this.selectedIndex_ = -1;
       this.itemList_ = [];
       if (this.origin)
         this.origin.createItems(this);
       this.itemsChild.appendChild(this.infoChild);
       this.enableAnimation_();
     },
 
     /**
      * Append a new cookie node "bubble" to this list item.
@@ skipping 36 matching lines @@
         if (item && item.div)
           item.div.removeAttribute('selected');
       }
       // Special case: decrementing -1 wraps around to the end of the list.
       if (itemIndex == -2)
         itemIndex = this.itemList_.length - 1;
       // Check if we're going out of bounds and hide the item details.
       if (itemIndex < 0 || itemIndex >= this.itemList_.length) {
         this.selectedIndex_ = -1;
         this.disableAnimation_();
-        this.infoChild.classList.add('hidden');
+        this.infoChild.hidden = true;
         this.enableAnimation_();
         return;
       }
       // Set the new selected item and show the item details for it.
       this.selectedIndex_ = itemIndex;
       this.itemList_[itemIndex].div.setAttribute('selected', '');
       this.disableAnimation_();
       this.itemList_[itemIndex].node.setDetailText(this.infoChild,
                                                    this.list.infoNodes);
-      this.infoChild.classList.remove('hidden');
+      this.infoChild.hidden = false;
       this.enableAnimation_();
       // If we're near the bottom of the list this may cause the list item to go
       // beyond the end of the visible area. Fix it after the animation is done.
       var list = this.list;
       window.setTimeout(function() { list.scrollIndexIntoView(index); }, 150);
     },
   };
 
   /**
    * {@code CookieTreeNode}s mirror the structure of the cookie tree lazily, and
@@ skipping 491 matching lines @@
       parent.clear();
       this.addByParent_(parent, 0, children);
       parent.endBatchUpdates();
     },
   };
 
   return {
     CookiesList: CookiesList
   };
 });