title: How to use "system_indicator" in the manisfet of a Chrome Packaged App?
body: <p>I'm trying to create a Chrome package App with an icon in the system menu bar as explain here : <a href="https://docs.google.com/document/d/1QhhfR33Y28Yqnnoa_Sl3fnZK_mKtwt4dZe6kNyJ_MjU/edit">https://docs.google.com/document/d/1QhhfR33Y28Yqnnoa_Sl3fnZK_mKtwt4dZe6kNyJ_MjU/edit</a> , </p>
  
  <p>The Google Hangout App can implement this feature (it's not exactly the same behavior) but I don't find any good documentation to do the same.</p>
  
  <p>In the manifest page of Google Packaged App, we can see the field "system_indicator". Is it what I'm looking for ? When I try to set this field to an url of an icon, Chrome return me this error :</p>
  
  <blockquote>
    <p>'system_indicator' requires Google Chrome dev channel or newer, but this is the beta channel.</p>
  </blockquote>
  
  <p>I've also found this old page from the chromium project : <a href="http://www.chromium.org/developers/design-documents/extensions/proposed-changes/apis-under-development/system-indicator-api">http://www.chromium.org/developers/design-documents/extensions/proposed-changes/apis-under-development/system-indicator-api</a></p>
  
  <p>So my question is simple : can I build this feature for my app ? And if yes, how ?</p>
  
  <p>Thank you for your help ! :-) </p>