Add a "Simplify Page" option to the print preview dialog

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 237 matching lines @@
   font-weight: 700;
   line-height: 14px;
   padding: 24px 16px;
   font-size: 14px;
   text-align: right;
   text-decoration: none;
   text-transform: uppercase;
   width: 100%;
 }
 
+@media print {
+  #closeReaderView {
+    display: none;
+  }
+}
+
 #content {
   margin: 24px 16px 24px 16px;
 }
 
 #mainContent {
   flex: 1 1 auto;
   margin: 0px auto;
   max-width: 35em;
   width: 100%;
 }
@@ skipping 586 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);
 }