Move context menu module out of experimental.

chrome/common/extensions/docs/template/api_template.html

   <div id="gc-container" class="labs">
       <div id="devModeWarning">
         You are viewing extension docs in chrome via the 'file:' scheme: are you expecting to see local changes when you refresh? You'll need run chrome with --allow-file-access-from-files.
       </div>
       <!-- SUBTEMPLATES: DO NOT MOVE FROM THIS LOCATION -->
       <!-- In particular, sub-templates that recurse, must be used by allowing
            jstemplate to make a copy of the template in this section which
            are not operated on by way of the jsskip="true" -->
       <div jsskip="true" style="display:none">
 
@@ skipping 115 matching lines @@
       <!-- SIDENAV -->
       <div class="g-unit g-first" id="gc-toc" jsdisplay="showSideNav()">
         <ul>
           <li><a href="getstarted.html">Getting Started</a></li>
           <li><a href="overview.html">Overview</a></li>
           <li><h2><a href="devguide.html">Developer's Guide</a></h2>
             <ul>
               <li>Browser UI
                 <ul>
                   <li><a href="browserAction.html">Browser Actions</a></li>
+                  <li><a href="contextMenus.html">Context Menus</a></li>
                   <li><a href="notifications.html">Desktop Notifications</a></li>
                   <li><a href="options.html">Options Pages</a></li>
                   <li><a href="override.html">Override Pages</a></li>
                   <li><a href="pageAction.html">Page Actions</a></li>
                   <li><a href="themes.html">Themes</a></li>
                 </ul>
               </li>
               <li>Browser Interaction
                 <ul>
                   <li><a href="bookmarks.html">Bookmarks</a></li>
@@ skipping 309 matching lines @@
     _uanchor=1;
     _uff=0;
     urchinTracker();
   }
   catch(e) {/* urchinTracker not available. */}
 </script>
 <!-- end analytics -->
       </div>
     </div> <!-- /gc-footer -->
   </div> <!-- /gc-container -->