Extension docs server: CSS and content tweaks.

chrome/common/extensions/docs/server2/templates/private/apps_sidenav.html

-<div class="g-unit g-first" id="gc-toc">
+<div class="g-unit g-first" id="gc-sidebar">
   <ul>
-    <li>
-      <input type="search" id="api_search" results placeholder="Search APIs">
-      <div id="filtered_apis"></div>
-    </li>
-    <li><h2>Getting Started</h2>
+    <li><span>Getting Started</span>
       <ul>
         <li><a href="about_apps.html">What Are Packaged Apps?</a></li>
         <li><a href="app_architecture.html">Understand the Architecture</a></li>
         <li><a href="first_app.html">Create Your First App</a></li>
       </ul>
     </li>
-    <li><h2>Developing</h2>
+    <li><span>Developing</span>
       <ul>
           <li><a href="develop_apps.html">Before You Start</a></li>
           <li><span>The Fundamentals</span>
-            <ul>
+            <ul toggleable>
               <li><a href="app_lifecycle.html">Manage App Lifecycle</a></li>
               <li><a href="app_storage.html">Manage Data</a></li>
               <li><a href="offline_apps.html">Offline First</a></li>
               <li><a href="app_external.html">Embed Content</a></li>
             </ul>
           </li>
           <li><span>Security &amp; Privacy</span>
-            <ul>
+            <ul toggleable>
               <li><a href="app_identity.html">Identify User</a></li>
               <li><a href="app_csp.html">Comply with CSP</a></li>
             </ul>
           </li>
           <li><span>Advanced Technologies</span>
-            <ul>
+            <ul toggleable>
               <li><a href="app_network.html">Network Communications</a></li>
               <li><a href="app_hardware.html">Access Hardware Devices</a></li>
               <li><a href="app_intents.html">Connect Apps with Web Intents</a></li>
             </ul>
           </li>
           <li><a href="app_frameworks.html">MVC Architecture</a></li>
         </ul>
       </li>
-      <li><h2>Deploying</h2>
+      <li><span>Deploying</span>
         <ul>
           <li><a href="publish_app.html">Publish</a></li>
         </ul>
       </li>
-      <li><h2>Reference</h2>
+      <li><span>Reference</span>
         <ul>
           <li><a href="manifest.html">Manifest Files</a></li>
           <li><a href="api_index.html">Chrome JavaScript APIs</a></li>
           <li><a href="api_other.html">Supported Libraries</a></li>
           <li><a href="app_deprecated.html">Disabled Web Features</a></li>
         </ul>
       </li>
-      <li><h2><a href="apps_samples.html">Samples</a></h2></li>
-      <li><h2><a href="app_known_issues.html">Known Issues</a></h2></li>
+      <li><span><a href="apps_samples.html">Samples</a></span></li>
+      <li><span><a href="app_known_issues.html">Known Issues</a></span></li>
   </ul>
 </div>