WebUI: Fix violations of no-extra-semi lint rule.

chrome/browser/resources/settings/site_settings/cookie_tree_node.js

 // Copyright 2016 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.
 
 /**
  * @typedef {{title: string,
  *            id: string,
  *            data: CookieDetails}}
  */
 var CookieDataItem;
@@ skipping 56 matching lines @@
      * The data for this cookie node.
      * @type {CookieDetails}
      */
     this.data = data;
 
     /**
      * The child cookie nodes.
      * @private {!Array<!settings.CookieTreeNode>}
      */
     this.children_ = [];
-  };
+  }
 
   CookieTreeNode.prototype = {
     /**
      * Converts a list of cookies and add them as CookieTreeNode children to
      * the given parent node.
      * @param {!settings.CookieTreeNode} parentNode The parent node to add
      *     children to.
      * @param {!Array<!CookieDetails>} newNodes The list containing the data to
      *     add.
      */
@@ skipping 138 matching lines @@
           return this.children_[i];
       }
       return null;
     },
   };
 
   return {
     CookieTreeNode: CookieTreeNode,
   };
 });