adjust margin on right of ntp footer menus

chrome/browser/resources/ntp4/footer_menu.css

 /* 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. */
 
 .footer-menu-button {
   -webkit-appearance: none;
   -webkit-padding-end: 15px;
   -webkit-padding-start: 9px;
   -webkit-transition: opacity 200ms;
   -webkit-transition-delay: 100ms;
@@ skipping 20 matching lines @@
 
 .footer-menu-button[menu-shown] {
   color: #555;
 }
 
 .footer-menu-button[menu-shown] .disclosure-triangle {
   background-color: #555;
 }
 
 .footer-menu {
+  -webkit-margin-end: 10px;
   max-height: 400px;
   overflow: auto;
   padding: 6px 8px;
   /* Needs to be above #footer. */
   z-index: 10;
 }
 
 .footer-menu,
 .footer-menu-context-menu {
   min-width: 150px;
@@ skipping 98 matching lines @@
 .footer-menu-context-menu {
   /* Needs to be above .footer-menu. */
   z-index: 11;
 }
 
 .footer-menu hr {
   background-color: rgb(217, 217, 217);
   border: 0;
   height: 1px;
 }