title: Chrome identity api to get profile info
body: <p>I want general profile information of user like birthdate, gender, username,etc. I am able to get email and unique profile id of user by using <code>getProfileUserInfo</code> method of identity api. 
  It returns only email and id like this: </p>
  
  <pre><code>userinfo Object {email: "hxxxxxxxxx@gmail.com", id: "1xxxxxxxxxxx49189xx"}
  </code></pre>
  
  <p>How do I get additional information?</p>