[MD settings] ManageLanguages settings, removing grey top line

chrome/browser/resources/settings/settings_shared_css.html

 /* 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. */
 
 /**
  * @fileoverview
  * Common styles for Material Design settings.
  */
 
 <dom-module id="settings-shared">
   <template>
     <style>
       h2 {
+        @apply(--layout-center);
         color: var(--paper-grey-500);
+        display: flex;
         font-size: 100%;
-        font-weight: normal;
-        margin-bottom: 20px;
-        margin-top: 30px;
+        font-weight: 500;
+        margin: 0;
+        min-height: 40px;
       }
 
       iron-icon {
         color: #969696;
       }
 
       iron-icon[icon=done] {
         color: rgb(0, 128, 0);
       }
 
@@ skipping 53 matching lines @@
         display: flex;
         margin-top: 25px;
       }
 
       .button-strip {
         text-align: end;
       }
 
       .list-frame {
         @apply(--layout-center);
-        display: block;
         -webkit-padding-end: 20px;
         -webkit-padding-start: 48px;
+        display: block;
         padding-bottom: 0;
         padding-top: 0;
       }
 
       .list-frame select {
         -webkit-margin-start: 4px;
       }
 
       .list-frame .secondary {
         color: #969696;
@@ skipping 122 matching lines @@
       .vertical-list > div:first-of-type {
         border-top: none;
       }
 
       .vertical-list > div {
         border-top: 1px solid var(--paper-grey-300);
       }
     </style>
   </template>
 </dom-module>