History: Remove extra padding around search field on mobile.

chrome/browser/resources/history/history_mobile.css

 /* Copyright (c) 2013 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. */
 
 /* This file contains styles specific to Android and iOS. */
 
 body {
   color: rgb(76, 76, 76);
   margin: 0;
   margin-bottom: 46px;
@@ skipping 38 matching lines @@
 }
 
 #search-field {
   -webkit-padding-start: 64px;
   background-image:
       url('../../../../ui/webui/resources/images/2x/search.png');
   background-position: left 16px center;
   background-repeat: no-repeat;
   background-size: 32px;
   border: 0;
+  display: block;
   line-height: 1.5;
   margin-top: 16px;
   width: 100%;
 }
 
 html[dir='rtl'] #search-field {
   background-position: right 16px center;
 }
 
 /* Hide the search field if it is empty (!valid) and there are no results. */
@@ skipping 204 matching lines @@
 
 h1,
 #notification-bar,
 #loading-spinner,
 .no-results-message {
   padding-left: 0;
   padding-right: 0;
 }
 
 } /* @media only screen and (max-width:720px) */