Center distiller results on desktop

components/dom_distiller/core/css/distilledpage.css

 /* Copyright 2014 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. */
 
 /* Set the global 'box-sizing' state to 'border-box'.
  * *::after and *::before used to select pseudo-elements not selectable by *. */
 
 *,
 *::after,
 *::before {
@@ skipping 144 matching lines @@
 }
 
 #content {
   margin: 0.2rem;
 }
 
 /* Main margins. */
 
 body {
   max-width: 800px;
-  margin: 0px;
+  margin: 0px auto 0px auto;
 }
 
 #mainContent {
   margin: auto 0px;
 }
 
 #articleHeader {
   background-color: rgb(73, 73, 73);
   color: white;
   min-height: 90px;
@@ skipping 618 matching lines @@
   border-color: rgb(250,36,36);
 }
 
 #loader.red .circle.red .mask.first .mover {
   background-color: rgb(33,89,189);
 }
 
 #loader.red .circle.red .mask.second .mover {
   background-color: rgb(250,36,36);
 }