WebUI: Enable ESLint rule for missing semicolons.

chrome/browser/resources/bookmark_manager/js/main.js

 // Copyright (c) 2012 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.
 
 (function() {
 'use strict';
 
 /** @const */ var BookmarkList = bmm.BookmarkList;
 /** @const */ var BookmarkTree = bmm.BookmarkTree;
 /** @const */ var Command = cr.ui.Command;
@@ skipping 865 matching lines @@
   return (opt_target || document.activeElement) == bmm.tree ?
       bmm.tree.selectedFolders : bmm.list.selectedItems;
 }
 
 /**
  * @param {EventTarget=} opt_target The target list or tree.
  * @return {!Array<string>} An array of the selected bookmark IDs.
  */
 function getSelectedBookmarkIds(opt_target) {
   var selectedNodes = getSelectedBookmarkNodes(opt_target);
-  selectedNodes.sort(function(a, b) { return a.index - b.index });
+  selectedNodes.sort(function(a, b) { return a.index - b.index; });
   return selectedNodes.map(function(node) {
     return node.id;
   });
 }
 
 /**
  * @param {BookmarkTreeNode} node The node to test.
  * @return {boolean} Whether the given node is unmodifiable.
  */
 function isUnmodifiable(node) {
@@ skipping 636 matching lines @@
 
   cr.ui.FocusOutlineManager.forDocument(document);
   initializeSplitter();
   bmm.addBookmarkModelListeners();
   dnd.init(selectItemsAfterUserAction);
   bmm.tree.reload();
 }
 
 initializeBookmarkManager();
 })();