A couple of accessibility-related updates/fixes.

chrome/common/extensions/docs/static/devguide.html

 <div id="pageData-name" class="pageData">Developer's Guide</div>
 
 <p>
 These pages assume you've completed
 the <a href="getstarted.html">Getting Started</a> tutorial
 and <a href="overview.html">Overview</a>.
 </p>
 
 <table class="columns">
   <tr>
@@ skipping 59 matching lines @@
     <td> Create, modify, and rearrange windows in the browser </td>
   </tr>
 
   <tr>
     <td colspan="2"><h4>Implementing the innards of your extension</h4></td>
   </tr>
   <tr>
     <td colspan="2"> &nbsp;</td>
   </tr>
   <tr>
+    <td> <a href="a11y.html">Accessibility (a11y)</a> </td>
+    <td> Make your extension accessible to people with disabilities </td>
+  </tr>
+  <tr>
     <td> <a href="background_pages.html">Background&nbsp;Pages</a> </td>
     <td> Put all the common code for your extension in a single place </td>
   </tr>
   <tr>
     <td> <a href="content_scripts.html">Content&nbsp;Scripts</a> </td>
     <td> Run JavaScript code in the context of web pages </td>
   </tr>
   <tr>
     <td> <a href="xhr.html">Cross-Origin&nbsp;XHR</a> </td>
     <td> Use XMLHttpRequest to send and receive data from remote servers </td>
@@ skipping 29 matching lines @@
   <tr>
     <td> <a href="external_extensions.html">Other Deployment Options</a> </td>
     <td> Distribute extensions on your network or with other software </td>
   </tr>
   <tr>
     <td> <a href="packaging.html">Packaging</a> </td>
     <td> Create a <code>.crx</code> file so you can distribute your extension </td>
   </tr>
 </table>