Add Application.Delegate.stop.

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..8ecb36c7df4396f958370cb805c5722f0d5f21bf 100644
--- a/remoting/webapp/app_remoting/js/app_remoting.js
+++ b/remoting/webapp/app_remoting/js/app_remoting.js
@@ -184,12 +184,7 @@ remoting.AppRemoting.prototype.start = function(connector, token) {
  * @param {remoting.Error} error The failure reason.
  */
 remoting.AppRemoting.prototype.signInFailed = function(error) {
-  if (error == remoting.Error.CANCELLED) {
-    chrome.app.window.current().close();
-    remoting.LoadingWindow.close();
-  } else {
-    this.handleError(error);
-  }
+  this.handleError(error);
 };
 
 /**
@@ -343,3 +338,10 @@ remoting.AppRemoting.prototype.handleError = function(errorTag) {
       chrome.i18n.getMessage(/*i18n-content*/'CONNECTION_FAILED'),
       chrome.i18n.getMessage(/** @type {string} */ (errorTag)));
 };
+
+/**
+ * Close the loading window before exiting.
+ */
+remoting.AppRemoting.prototype.handleExit = function() {
+  remoting.LoadingWindow.close();
+};