Dynamically generate a heading for Extension Docs API pages

chrome/common/extensions/docs/templates/intros/storage.html

 <table class="intro">
   <tr>
     <th scope="col"></th>
     <th scope="col"></th>
   </tr>
   <tr>
-    <td><strong>Description:</strong></td>
-    <td>Use the <code>chrome.storage</code> module
-    to store, retrieve, and track changes to user data.</td>
-  </tr>
-  <tr>
-    <td><strong>Availability:</strong></td>
-    <td>Google Chrome 20</td>
-  </tr>
-  <tr>
     <td><strong>Permissions:</strong></td>
     <td><code>"storage"</code></td>
   </tr>
   <tr>
     <td><strong>Learn more:</strong></td>
     <td><a href="https://developers.google.com/live/shows/7320022/">Chrome Apps Office Hours: Chrome Storage APIs</a><br>
     <a href="https://developers.google.com/live/shows/7320022-1/">Chrome Apps Office Hours: Storage API Deep Dive</a></td>
   </tr>
 </table>
 
@@ skipping 127 matching lines @@
     var storageChange = changes[key];
     console.log('Storage key "%s" in namespace "%s" changed. ' +
                 'Old value was "%s", new value is "%s".',
                 key,
                 namespace,
                 storageChange.oldValue,
                 storageChange.newValue);
   }
 });
 </pre>