MD downloads: implement incognito markers

chrome/browser/resources/md_downloads/item.css

 /* Copyright 2015 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. */
 
 :host {
   @apply(--downloads-shared-style);
   display: flex;
   margin: 32px 0;
 }
 
@@ skipping 107 matching lines @@
   --paper-progress-active-color: rgb(54, 126, 237);
   --paper-progress-container-color: rgb(223, 222, 223);
   width: auto;
 }
 
 /* TODO(dbeam): open up a CSS mixin instead in Polymer. */
 #progress /deep/ #progressContainer {
   border-radius: 2px;
 }
 
+#incognito {
+  -webkit-margin-end: 0;
+  -webkit-margin-start: 16px;
+  /* This image is 128x128 so it'll work fine in 2x. */
+  content: url(../../../../ui/webui/resources/images/incognito_icon.png);
+  width: 64px;
+}
+
 #remove-wrapper {
   align-self: flex-start;
   margin: 0;
 }
 
 #remove {
   --paper-icon-button: {
     height: 16px;
     width: 16px;
   };
@@ skipping 28 matching lines @@
   #content {
     margin: 0 auto;
   }
 
   #date-container {
     flex: none !important;
     margin: 0 auto 32px;
     width: var(--downloads-item-width);
   }
 }