Fix JavaScript errors in options2

chrome/browser/resources/options2/browser_options_startup_page_list.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.
 
 cr.define('options.browser_options', function() {
   const AutocompleteList = cr.ui.AutocompleteList;
   const InlineEditableItem = options.InlineEditableItem;
   const InlineEditableItemList = options.InlineEditableItemList;
 
   /**
@@ skipping 51 matching lines @@
         titleEl.title = pageInfo['tooltip'];
       }
 
       this.contentElement.appendChild(titleEl);
 
       var urlEl = this.createEditableTextCell(pageInfo['url']);
       urlEl.className = 'url';
       urlEl.classList.add('weakrtl');
       this.contentElement.appendChild(urlEl);
 
-      var urlField = urlEl.querySelector('input')
+      var urlField = urlEl.querySelector('input');
       urlField.required = true;
       urlField.className = 'weakrtl';
       urlField.placeholder = localStrings.getString('startupPagesPlaceholder');
       this.urlField_ = urlField;
 
       this.addEventListener('commitedit', this.onEditCommitted_);
 
       var self = this;
       urlField.addEventListener('focus', function(event) {
         self.parentNode.autocompleteList.attachToInput(urlField);
@@ skipping 64 matching lines @@
       var item = new StartupPageListItem(pageInfo);
       item.urlField_.disabled = this.disabled;
       return item;
     },
 
     /** @inheritDoc */
     deleteItemAtIndex: function(index) {
       chrome.send('removeStartupPages', [String(index)]);
     },
 
-    /*
+    /**
      * Computes the target item of drop event.
      * @param {Event} e The drop or dragover event.
      * @private
      */
-    getTargetFromDropEvent_ : function(e) {
+    getTargetFromDropEvent_: function(e) {
       var target = e.target;
       // e.target may be an inner element of the list item
       while (target != null && !(target instanceof StartupPageListItem)) {
         target = target.parentNode;
       }
       return target;
     },
 
-    /*
+    /**
      * Handles the dragstart event.
      * @param {Event} e The dragstart event.
      * @private
      */
     handleDragStart_: function(e) {
       // Prevent dragging if the list is disabled.
       if (this.disabled) {
         e.preventDefault();
         return false;
       }
@@ skipping 59 matching lines @@
       var newIndex = this.dataModel.indexOf(dropTarget.pageInfo_);
       if (this.dropPos == 'below')
         newIndex += 1;
 
       var selected = this.selectionModel.selectedIndexes;
       var stringized_selected = [];
       for (var j = 0; j < selected.length; j++)
         stringized_selected.push(String(selected[j]));
 
       chrome.send('dragDropStartupPage',
-          [String(newIndex), stringized_selected] );
+          [String(newIndex), stringized_selected]);
     },
 
-    /*
+    /**
      * Handles the dragleave event.
-     * @param {Event} e The dragleave event
+     * @param {Event} e The dragleave event.
      * @private
      */
     handleDragLeave_: function(e) {
       this.hideDropMarker_();
     },
 
     /**
      * Handles the dragend event.
-     * @param {Event} e The dragend event
+     * @param {Event} e The dragend event.
      * @private
      */
     handleDragEnd_: function(e) {
       this.draggedItem.editable = true;
       this.draggedItem.updateEditState();
     },
 
-    /*
+    /**
      * Shows and positions the marker to indicate the drop target.
-     * @param {HTMLElement} target The current target list item of drop
-     * @param {string} pos 'below' or 'above'
+     * @param {HTMLElement} target The current target list item of drop.
+     * @param {string} pos 'below' or 'above'.
      * @private
      */
-    showDropMarker_ : function(target, pos) {
+    showDropMarker_: function(target, pos) {
       window.clearTimeout(this.hideDropMarkerTimer_);
       var marker = $('startupPagesListDropmarker');
       var rect = target.getBoundingClientRect();
       var markerHeight = 6;
       if (pos == 'above') {
-        marker.style.top = (rect.top - markerHeight/2) + 'px';
+        marker.style.top = (rect.top - markerHeight / 2) + 'px';
       } else {
-        marker.style.top = (rect.bottom - markerHeight/2) + 'px';
+        marker.style.top = (rect.bottom - markerHeight / 2) + 'px';
       }
       marker.style.width = rect.width + 'px';
       marker.style.left = rect.left + 'px';
       marker.style.display = 'block';
     },
 
-    /*
+    /**
      * Hides the drop marker.
      * @private
      */
-    hideDropMarker_ : function() {
+    hideDropMarker_: function() {
       // Hide the marker in a timeout to reduce flickering as we move between
       // valid drop targets.
       window.clearTimeout(this.hideDropMarkerTimer_);
       this.hideDropMarkerTimer_ = window.setTimeout(function() {
         $('startupPagesListDropmarker').style.display = '';
       }, 100);
     },
   };
 
   return {
     StartupPageList: StartupPageList
   };
 });