Add margins to buttons on about:sync-internals.

chrome/browser/resources/sync_internals/about.css

 /* Copyright 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.
  */
 
 #about-info {
   -webkit-column-width: 350px;
 }
 
 #about-info > div {
@@ skipping 75 matching lines @@
   color: #7f7f7f;
 }
 
 #status {
   margin-left: auto;
   margin-right: auto;
   text-align: center;
   width: 300px;
 }
 
+#dump-status {
+  margin: 2px;
+}
+
+#import-status {
+  margin: 2px;
+}
+
 #traffic-event-container {
   border: 1px solid;
   height: 500px;
   max-width: 500px;
   overflow-y: auto;
 }
 
 .traffic-event-entry {
   border: 2px outset;
   padding: 0.5em;
@@ skipping 25 matching lines @@
 }
 
 .traffic-event-entry-expanded .proto {
   background-color: #fff;
   border: 1px solid #222;
   display: block;
   max-height: 300px;
   overflow-x: auto;
   overflow-y: auto;
 }