Index: Src/GoogleApis.Auth.WinRT/OAuth2/GoogleWebAuthorizationBroker.cs
===================================================================
--- a/Src/GoogleApis.Auth.WinRT/OAuth2/GoogleWebAuthorizationBroker.cs
+++ b/Src/GoogleApis.Auth.WinRT/OAuth2/GoogleWebAuthorizationBroker.cs
@@ -69,10 +69,27 @@
                 DataStore = new StroageDataStore()
             };
 
-            var installedApp = new AuthorizationCodeWinRTInstalledApp(initializer);
+            var installedApp = new AuthorizationCodeWinRTInstalledApp(new GoogleAuthorizationCodeFlow(initializer));
             return await installedApp.AuthorizeAsync(user, taskCancellationToken).ConfigureAwait(false);
         }
 
+        /// <summary>
+        /// Reauthorizes asynchronously the user. This method should be called if the user wants to reauthorize after
+        /// he already revoked the token.
+        /// </summary>
+        /// <param name="userCredential">The current user credential. Its <see cref="UserCredential.Token"/></param>
+        /// will be updated.
+        /// <param name="taskCancellationToken">Cancellation token to cancel an operation.</param>
+        public static async Task ReauthorizeAsync(UserCredential userCredential,
+            CancellationToken taskCancellationToken)
+        {
+            var installedApp = new AuthorizationCodeWinRTInstalledApp(userCredential.Flow);
+            // Create an authorization code installed app instance and authorize the user.
+            UserCredential newUserCredential = await installedApp.AuthorizeAsync(
+                userCredential.UderId, taskCancellationToken).ConfigureAwait(false);
+            userCredential.Token = newUserCredential.Token;
+        }
+
         /// <summary>Loads the client secrets from the given URI.</summary>
         /// <param name="clientSecretsUri">The client secrets URI.</param>
         /// <returns>Client secrets.</returns>