Handle authentication failures in the v2 app by restarting the app

remoting/webapp/crd/js/oauth2.js

Index: remoting/webapp/crd/js/oauth2.js
diff --git a/remoting/webapp/crd/js/oauth2.js b/remoting/webapp/crd/js/oauth2.js
index 52e12f8841480cf92bb92a8b2d7e274289e2e1cd..77d53234b93a63d980badeed28c17bf398ba2caf 100644
--- a/remoting/webapp/crd/js/oauth2.js
+++ b/remoting/webapp/crd/js/oauth2.js
@@ -292,21 +292,35 @@ remoting.OAuth2.prototype.getAuthorizationCode = function(onDone) {
 /**
  * Redirect page to get a new OAuth Refresh Token.
  *
- * @param {function():void} onDone Completion callback.
- * @return {void} Nothing.
+ * @return {Promise} A promise that resolves when the token is received.
  */
-remoting.OAuth2.prototype.doAuthRedirect = function(onDone) {
+remoting.OAuth2.prototype.handleAuthFailure = function() {
+  var deferred = new base.Deferred();
+
   /** @type {remoting.OAuth2} */
   var that = this;
   /** @param {?string} code */
   var onAuthorizationCode = function(code) {
     if (code) {
-      that.exchangeCodeForToken(code, onDone);
+      that.exchangeCodeForToken(code, deferred.resolve.bind(deferred));
     } else {
-      onDone();
+      deferred.reject(remoting.Error.NOT_AUTHENTICATED);
     }
   };
   this.getAuthorizationCode(onAuthorizationCode);
+
+  return deferred.promise();
+};
+
+/**
+ * Removes the cached token, prompts the user to get the new token and
+ *   relaunches the current window.
+ * @return {void}  Nothing.
+ */
+remoting.OAuth2.prototype.handleAuthFailureAndRelaunch = function() {
+  this.handleAuthFailure().then(function() {
+    window.location.reload();
+  });
 };
 
 /**