tools/android/loading Add link to dashboard and a way to cancel tasks.

tools/android/loading/cloud/frontend/templates/log.html

 {# Copyright 2016 The Chromium Authors. All rights reserved.
    Use of this source code is governed by a BSD-style license that can be
    found in the LICENSE file.
 #}
 
 {# Template for a page displaying a body and logs (optional) under a collapsible
    section.
 #}
 {% extends "base.html" %}
 
 {% block content %}
 
-<h2> Task Creation Status </h2>
+<h2> {{ title }} </h2>
 
 {{ body }}
 
 {% if log %}
 
 <p><a onclick="javascript:ShowHide('HiddenDiv'); return false;" href="#">
   Show/hide details
 </a></p>
 
 <div id="HiddenDiv"
   style="display:none; font: 0.8em 'Droid Sans Mono', monospace;">
 
 {# Loop over the lines of the log to add linebreaks. #}
 {%- for line in log -%}
   {{ line }}<br/>
 {%- endfor -%}
 
 </div>
 
 <script type="text/javascript">
 function ShowHide(divId) {
   element = document.getElementById(divId)
   element.style.display = (element.style.display == 'none') ? 'block' : 'none';
 }
 </script>
 
 {% endif %}
 
 {% endblock %}