MD Downloads: remove unused event parameter to fix closure compile

chrome/browser/resources/md_downloads/manager.js

 // Copyright 2015 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('downloads', function() {
   var Manager = Polymer({
     is: 'downloads-manager',
 
     properties: {
       hasDownloads_: {
@@ skipping 75 matching lines @@
      * @param {Event} e
      * @private
      */
     onCommand_: function(e) {
       if (e.command.id == 'clear-all-command')
         downloads.ActionService.getInstance().clearAll();
       else if (e.command.id == 'undo-command')
         downloads.ActionService.getInstance().undo();
     },
 
-    /**
-     * @param {Event} e
-     * @private
-     */
-    onListScroll_: function(e) {
+    /** @private */
+    onListScroll_: function() {
       var list = this.$['downloads-list'];
       if (list.scrollHeight - list.scrollTop - list.offsetHeight <= 100) {
         // Approaching the end of the scrollback. Attempt to load more items.
         downloads.ActionService.getInstance().loadMore();
       }
     },
 
     /** @private */
     onLoad_: function() {
       cr.ui.decorate('command', cr.ui.Command);
@@ skipping 61 matching lines @@
   Manager.removeItem = function(index) {
     Manager.get().removeItem_(index);
   };
 
   Manager.updateItem = function(index, data) {
     Manager.get().updateItem_(index, data);
   };
 
   return {Manager: Manager};
 });