MD Bookmarks: Prevent navigating to invalid folders

chrome/browser/resources/md_bookmarks/dnd_manager.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.
 
 cr.define('bookmarks', function() {
   /**
    * @param {BookmarkElement} element
    * @return {boolean}
    */
   function isBookmarkItem(element) {
@@ skipping 140 matching lines @@
       var itemId = overElement ? overElement.itemId : null;
       var store = bookmarks.Store.getInstance();
 
       // If hovering over the same folder as last update, open the folder after
       // the delay has passed.
       if (overElement && overElement == this.lastElement_) {
         if (eventTimestamp - this.lastTimestamp_ < this.EXPAND_FOLDER_DELAY)
           return;
 
         var action = bookmarks.actions.changeFolderOpen(itemId, true);
-        store.handleAction(action);
+        store.dispatch(action);
       } else if (
           overElement && isBookmarkFolderNode(overElement) &&
           bookmarks.util.hasChildFolders(itemId, store.data.nodes) &&
           store.data.closedFolders.has(itemId)) {
         // Since this is a closed folder node that has children, set the auto
         // expander to this element.
         this.lastTimestamp_ = eventTimestamp;
         this.lastElement_ = overElement;
         return;
       }
@@ skipping 455 matching lines @@
       this.dropIndicator_.setTimeout = this.setTimeout_;
     }
   };
 
   return {
     DNDManager: DNDManager,
     DragInfo: DragInfo,
     DropIndicator: DropIndicator,
   };
 });