Add hack to enable multilogin.

appengine/isolate/templates/root.html

 {% set title = 'Isolate Server' %}
 {% extends "isolate/base.html" %}
 
 {% block headers %}
 <style>
   .highlight_section {
     background-color: #ffffee;
     border-radius: 20px;
     padding: 10px;
   }
@@ skipping 17 matching lines @@
 <h1>Isolate Server</h1>
 <div class=highlight_section>
 Isolate Server is a Content-Addressed Cache that is used by the Swarming
 project to distribute test execution accross a swarming bots.
 It is written in python and runs on <a
 href="https://cloud.google.com/appengine/">AppEngine</a>. It is part of <a
 href="https://github.com/luci/luci-py">LUCI</a>.
 </div>
 <p>
 
-{% if not nickname %}
+{% if user_type %}
+As a {{user_type}}, you are entitled to see these pages:
+{% else %}
 Please <a href="{{signin_link|safe}}">sign in</a> for more access.
-{% else %}
-As a {{user_type}}, you are entitled to see these pages:
 {% endif %}
 
 <h3>Service Status</h3>
 <ul>
   <li><a href="/stats">Usage statistics</a></li>
   <li class="user"><a href="/browse">Browse files online</a></li>
   <li class="admin"><a href="/restricted/ereporter2/report">Exceptions in server log</a></li>
   <li class="admin"><a href="/restricted/ereporter2/errors">Ereporter2 errors</a></li>
   <li class="admin"><a href="/restricted/mapreduce/status">Map reduce jobs</a></li>
 </ul>
@@ skipping 11 matching lines @@
       <form action="/restricted/launch_mapreduce" method="post">
         <input type="hidden" name="xsrf_token" value="{{xsrf_token}}" />
         <input type="hidden" name="job_id" value="{{job.id}}" />
         <button type="submit">Launch '{{job.name}}'</button>
       </form>
     </li>
   {% endfor %}
 </ul>
 
 {% endblock %}