title: How to check if new version of Chrome is available?
body: <p>I am trying to build an extension that would notify a user when new version of Chrome is available. </p>
  
  <p>I tried to inspect network traffic when Chrome is checking for an update and it is sending a request to <code>http://74.125.95.113/service/update2?w=3:{long_encoded_string}</code> page that returns XML with information I need:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
      &lt;gupdate xmlns="http://www.google.com/update2/response" protocol="2.0" server="prod"&gt;
      &lt;daystart elapsed_seconds="31272"/&gt;
      &lt;app appid="{8A69D345-D564-463C-AFF1-A69D9E530F96}" status="ok"&gt;
          &lt;updatecheck status="noupdate"/&gt;
          &lt;ping status="ok"/&gt;
      &lt;/app&gt;
  &lt;/gupdate&gt;
  </code></pre>
  
  <p>Besides sending <code>{long_encoded_string}</code> as URL parameter it is also sending some encoded cookie.</p>
  
  <p>Maybe someone familiar with Chrome build process can shed some light on those encoded strings and how to build them? Maybe there is another easier way (I have a feeling that string encoding is a dead end for me)?</p>