title: Install unknown source apk on ChromeOs
body: <p>I updated my Chromebook Asus Flip this morning to get the Play Store.
  My Chromebook has the M53dev channel version installed. 
  It is working well. I can install and run Android apps downloaded from the Play Store.</p>
  
  <p>I would like to test my app but in the Security settings, I do not have the option to allow Unknown Source. I tried anyway to install my apk (that I downloaded using the Android Google Drive app) but the installation is blocked.</p>
  
  <p>Does anyone know how to do this?</p>