Changed identity API to use promises instead of callbacks.

remoting/webapp/crd/js/remoting.js

Index: remoting/webapp/crd/js/remoting.js
diff --git a/remoting/webapp/crd/js/remoting.js b/remoting/webapp/crd/js/remoting.js
index 97b6a1c42ea70fc2656b212538825d1e0d653230..8b534e41847dae75751b21e9e00f804a506a883b 100644
--- a/remoting/webapp/crd/js/remoting.js
+++ b/remoting/webapp/crd/js/remoting.js
@@ -109,7 +109,7 @@ remoting.promptClose = function() {
  * Also clear all local storage, to avoid leaking information.
  */
 remoting.signOut = function() {
-  remoting.oauth2.removeCachedAuthToken(function(){
+  remoting.oauth2.removeCachedAuthToken().then(function(){
     chrome.storage.local.clear();
     remoting.setMode(remoting.AppMode.HOME);
     window.location.reload();