Converted remoting.Error from an enum to a class

remoting/webapp/app_remoting/js/app_remoting.js

Index: remoting/webapp/app_remoting/js/app_remoting.js
diff --git a/remoting/webapp/app_remoting/js/app_remoting.js b/remoting/webapp/app_remoting/js/app_remoting.js
index fb14f6d06827f24e5a6490fff0a577a5fba0002d..30176d0de865c8ebc38ee8dca9b7aad2424a2cb0 100644
--- a/remoting/webapp/app_remoting/js/app_remoting.js
+++ b/remoting/webapp/app_remoting/js/app_remoting.js
@@ -181,10 +181,10 @@ remoting.AppRemoting.prototype.start = function(connector, token) {
  * Report an authentication error to the user. This is called in lieu of start()
  * if the user cannot be authenticated or if they decline the app permissions.
  *
- * @param {remoting.Error} error The failure reason.
+ * @param {!remoting.Error} error The failure reason.
  */
 remoting.AppRemoting.prototype.signInFailed = function(error) {
-  if (error == remoting.Error.CANCELLED) {
+  if (error.tag == remoting.Error.Tag.CANCELLED) {
     chrome.app.window.current().close();
     remoting.LoadingWindow.close();
   } else {
@@ -257,7 +257,7 @@ remoting.AppRemoting.prototype.handleDisconnected = function() {
  * Called when the current session's connection has failed.
  *
  * @param {remoting.SessionConnector} connector
- * @param {remoting.Error} error
+ * @param {!remoting.Error} error
  * @return {void} Nothing.
  */
 remoting.AppRemoting.prototype.handleConnectionFailed = function(
@@ -333,7 +333,7 @@ remoting.AppRemoting.prototype.handleExtensionMessage = function(
 /**
  * Called when an error needs to be displayed to the user.
  *
- * @param {remoting.Error} errorTag The error to be localized and displayed.
+ * @param {!remoting.Error} errorTag The error to be localized and displayed.
  * @return {void} Nothing.
  */
 remoting.AppRemoting.prototype.handleError = function(errorTag) {