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..5d087c66207e1535793659e3c7ed32a821e9a20d 100644
--- a/remoting/webapp/crd/js/oauth2.js
+++ b/remoting/webapp/crd/js/oauth2.js
@@ -82,15 +82,17 @@ remoting.OAuth2.prototype.isAuthenticated = function() {
 };
 
 /**
- * Removes all storage, and effectively unauthenticates the user.
+ * Remove the cached auth token, if any.
  *
+ * @param {function():void} onDone Completion callback.
  * @return {void} Nothing.
  */
-remoting.OAuth2.prototype.clear = function() {
+remoting.OAuth2.prototype.removeCachedAuthToken = function(onDone) {
   window.localStorage.removeItem(this.KEY_EMAIL_);
   window.localStorage.removeItem(this.KEY_FULLNAME_);
   this.clearAccessToken_();
   this.clearRefreshToken_();
+  onDone();
 };
 
 /**