title: Is it possible for an enterprise-installed extension to force "Allow in incognito" on?
body: <p>I have developed an extension which is to be installed by enterprise policy.  I want this extension to always be active, even in Incognito mode.  I see that the policy setting IncognitoModeAvailability allows me to either:<br>
   1. Never allow Incognito mode<br>
   2. Always force Incognito mode<br>
   3. Allow user to choose Incognito mode, which also allows user to choose if extension is to be functional in Incognito mode</p>
  
  <p>Is there a way under Option 3 above to force the "Allow in incognito" checkbox to be checked, along with graying out the checkbox so that the user cannot prevent my extension from working in Incognito mode?</p>