Adds the UserMedia requests to the UI of chrome://webrtc-internals.

content/browser/resources/media/webrtc_internals.css

 /* Copyright (c) 2013 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. */
 
 
 .peer-connection-dump-root {
   font-size: 0.8em;
   padding-bottom: 3px;
 }
 
@@ skipping 70 matching lines @@
   font-size: 0.8em;
   padding: 0 0 0.5em 0;
 }
 
 .tab-head {
   background-color: rgb(220, 220, 220);
   margin: 10px 2px 0 2px;
   text-decoration: underline;
   cursor: pointer;
   display: inline-block;
-  word-break: break-all;
+  overflow: hidden;
   width: 20em;
+  height: 3em;
 }
 
 .active-tab-head {
   background-color: turquoise;
   font-weight: bold;
 }
 
 .tab-body {
   border: 1px solid turquoise;
   border-top-width: 3px;
   padding: 0 10px 500px 10px;
   display: none;
 }
 
 .active-tab-body {
   display: block;
 }
+
+.user-media-request-div-class {
+  background-color: lightgray;
+  margin: 10px 0 10px 0;
+}
+
+.user-media-request-div-class > div {
+  margin: 5px 0 5px 0;
+}