[MD Downloads/Settings] Fix card style nits.

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;
 }
 
 #date {
@@ skipping 13 matching lines @@
   border-radius: 2px;
   display: flex;
   flex: none;
   margin: 6px 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);
+  @apply(--shadow-elevation-2dp);
 }
 
 #content:not(.is-active) {
   background: rgba(255, 255, 255, .6);
   box-shadow: 0 2px 2px 0 rgba(0, 0, 0, .03), 0 1px 4px 0 rgba(0, 0, 0, .048),
               0 3px 1px -2px rgba(0, 0, 0, .12);
 }
 
 #details {
   -webkit-border-start: 1px #d8d8d8 solid;
@@ skipping 157 matching lines @@
 }
 
 #incognito {
   bottom: 20px;
   content: -webkit-image-set(
       url(chrome://downloads/1x/incognito_marker.png) 1x,
       url(chrome://downloads/2x/incognito_marker.png) 2x);
   position: absolute;
   right: 10px;
 }