Adding rule frames to the ONC spec.

chromeos/docs/onc_spec.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. */
 
 .value {
   font-family: monospace;
   font-style: italic;
 }
 
 .type {
   color: blue;
   font-family: monospace;
 }
 
 .field {
   font-weight: bold;
   font-family: monospace;
 }
 
 .field_meta {
   text-align: left;
   background: rgb(240,240,240);
   display: block;
 }
 
 .field_list {
   margin-left: 1em;
 }
 
+.rule {
+  display: block;
+  border-style:solid;
+  border-width:2px;
+}
+
+.rule_id {
+  background: rgb(220,220,220);
+  border-style:none solid solid none;
+  border-width:2px;
+}
+
+.rule_id:before {
+  content: "Rule ";
+}
+
 .snippet {
   font-family: monospace;
 }
 
 body {
   text-align: justify;
   width:600px;
 }
 
 h1{font-size: 38px}
 section h1{font-size: 32px}
 section section h1{font-size: 28px}
 section section section h1{font-size: 24px}
 section section section section h1{font-size: 20px}
 section section section section section h1{font-size: 18px}
 section section section section section section h1{font-size: 16px}
 section section section section section section section h1{font-size: 14px}