title: Google packaged app - identity API - removeCachedAuthToken
body: <p><strong>[google chrome 28]</strong>
  I am using <code>chrome.experimental.identity</code> API in a packaged app and getAuthToken works fine - get's token with which I can get user info, etc.
  I understand that the identity API is moving out from being experimental to the trunk so as from chrome 29 I will be able to use <code>chrome.identity</code> and remove <code>"experimental"</code> permission from my manifest.</p>
  
  <p>Q: If I want to make a logout button is <code>removeCachedAuthToken</code> the way to go about it? I tried to use it in the experimental.identity but it does nothing.</p>