[Chrome Settings UI] Show overruled User Exceptions as strike-through.

chrome/browser/resources/options/content_settings.css

 /* Copyright (c) 2012 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. */
 
 #content-settings-page {
   min-width: 620px;
 }
 
 #content-settings-exceptions-area {
   min-width: 540px;
 }
 
 .exception-pattern {
   -webkit-box-flex: 1;
   -webkit-margin-end: 10px;
   -webkit-margin-start: 14px;
 }
 
 .exception-setting {
   display: inline-block;
   width: 120px;
 }
 
+.settings-list div[role='listitem'][controlled-by='policy'] .exception-setting,
+.settings-list div[role='listitem'][controlled-by='extension']
+    .exception-setting {
+  width: 112px;
+}
+
 select.exception-setting {
   vertical-align: middle;
 }
 
+.overruled .exception-setting {
+  width: 96px;
+}
+
+.overruled span.exception-setting {
+  text-decoration: line-through;
+}
+
 #exception-column-headers {
   -webkit-margin-start: 17px;
   display: -webkit-box;
   margin-top: 17px;
 }
 
 #exception-column-headers > div {
   font-weight: bold;
 }
 
@@ skipping 62 matching lines @@
   display: -webkit-box;
 }
 
 #media-audio-column {
   width: 6em;
 }
 
 #media-video-column {
   width: 8.5em;
 }