Add Media Router route-details.

chrome/browser/resources/media_router/elements/issue_banner/issue_banner.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. */
 
-button {
-  border: 1px solid rgb(193, 193, 195);
-  color: rgb(44, 44, 44);
-  cursor: pointer;
-  font-size: 0.875em;
-  font-weight: bold;
-  height: 32px;
-  overflow: hidden;
-  text-align: center;
-  width: 100%;
-}
-
 .button-secondary {
   background: linear-gradient(to top, rgb(254, 254, 254), rgb(222, 222, 222));
 }
 
 .button-action {
   background: linear-gradient(to top, rgb(89, 158, 244), rgb(75, 134, 241));
   border: 1px solid rgb(55, 113, 206);
   color: white;
 }
 
@@ skipping 40 matching lines @@
 
 :host-context(html[dir='ltr']) .sad-face {
   float: left;
   left: 4px;
 }
 
 :host-context(html[dir='rtl']) .sad-face {
   float: right;
   right: 4px;
 }