title: GCM 3.0 Refresh registration token needed?
body: <p>With the latest GCM update (3.0) is it still necessary to handle refreshing the registration token during situations such as reboot?  <a href="https://blog.pushbullet.com/2014/02/12/keeping-google-cloud-messaging-for-android-working-reliably-techincal-post/">This article</a> discusses making GCM reliable and covers several conditions where the registration token can change.  Are these steps necessary under the latest version? During the IO 2015 talk they talked as if the registration token was good until the app is uninstalled from the device.</p>
  
  <pre><code>InstanceID instanceID = InstanceID.getInstance(this);
  String token = instanceID.getToken(getString(R.string.gcm_defaultSenderId),
      GoogleCloudMessaging.INSTANCE_ID_SCOPE, null);
  </code></pre>