Vulcanize new Material Design downloads UI

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 {
   display: flex;
   flex-direction: column;
   margin: 12px 0;
 }
 
 #date {
   color: #7c7c7c;
   font-size: 100%;
   font-weight: 500;
   margin: 18px auto 16px;  /* This top margin + :host top margin = 30px. */
   width: var(--downloads-item-width);
 }
 
 #content {
   background: white;
   border-radius: 2px;
   display: flex;
   flex: none;
   margin: 0 auto;
   min-height: 103px;
+  position: relative;
   width: var(--downloads-item-width);
 }
 
 #content.is-active {
   box-shadow: 0 2px 2px 0 rgba(0, 0, 0, .05), 0 1px 4px 0 rgba(0, 0, 0, .08),
               0 3px 1px -2px rgba(0, 0, 0, .2);
 }
 
 #content:not(.is-active) {
   opacity: .6;
@@ skipping 35 matching lines @@
   align-self: flex-start;
   padding-top: 16px;
 }
 
 #content:not(.is-active) .icon {
   -webkit-filter: grayscale(100%);
   opacity: .5;
 }
 
 #warning {
-  -webkit-mask-image: url(../../../../ui/webui/resources/images/warning.svg);
+  -webkit-mask-image: url(chrome://resources/images/warning.svg);
   -webkit-mask-repeat: no-repeat;
   -webkit-mask-size: 100%;
   background: rgb(255, 193, 7);
 }
 
 #name,
 #file-link,
 #url {
   max-width: 100%;
 }
@@ skipping 94 matching lines @@
     /* HACK(dbeam): we probably shouldn't be overriding Polymer like this. */
   };
   color: #969696;
   height: 16px;
   padding: 8px;
   width: 16px;
 }
 
 #incognito {
   bottom: 20px;
-  content: -webkit-image-set(url(1x/incognito_marker.png) 1x,
-                             url(2x/incognito_marker.png) 2x);
+  content: -webkit-image-set(
+      url(chrome://downloads/1x/incognito_marker.png) 1x,
+      url(chrome://downloads/2x/incognito_marker.png) 2x);
   position: absolute;
   right: 10px;
 }