Changed identity API to use promises instead of callbacks.

remoting/webapp/crd/js/crd_event_handlers.js

Index: remoting/webapp/crd/js/crd_event_handlers.js
diff --git a/remoting/webapp/crd/js/crd_event_handlers.js b/remoting/webapp/crd/js/crd_event_handlers.js
index 4d21a5a8ee739a4e38bc620cbb4f27df8ca403a6..b730db429c0b4abc67e192712e090bd2a89a91c8 100644
--- a/remoting/webapp/crd/js/crd_event_handlers.js
+++ b/remoting/webapp/crd/js/crd_event_handlers.js
@@ -15,12 +15,11 @@ remoting.initElementEventHandlers = function() {
     // We don't need a token until we authenticate, but asking for one here
     // handles the token-expired case earlier, avoiding asking the user for
     // the access code both before and after re-authentication.
-    remoting.identity.callWithToken(
-        /** @param {string} token */
-        function(token) {
+    remoting.identity.getToken().
+        then(function(token) {
           remoting.setMode(remoting.AppMode.CLIENT_UNCONNECTED);
-        },
-        remoting.showErrorMessage);
+        }).
+        catch(remoting.Error.handler(remoting.showErrorMessage));
   };
   var goFinishedIT2Me = function() {
     if (remoting.currentMode == remoting.AppMode.CLIENT_CONNECT_FAILED_IT2ME) {