Revert "Revert of Reland: Switch WindowedNotificationObserver to use base::RunLoop. (patchset #3 id…

chrome/browser/ui/login/login_handler_test_utils.cc

Index: chrome/browser/ui/login/login_handler_test_utils.cc
diff --git a/chrome/browser/ui/login/login_handler_test_utils.cc b/chrome/browser/ui/login/login_handler_test_utils.cc
index a0814c6bdc8aef656f501aca0885c5c03bbccf94..d1c419d728d2fc059f7e58b29b3d17d5ff0a0f3e 100644
--- a/chrome/browser/ui/login/login_handler_test_utils.cc
+++ b/chrome/browser/ui/login/login_handler_test_utils.cc
@@ -57,6 +57,10 @@ void LoginPromptBrowserTestObserver::Register(
   registrar_.Add(this, chrome::NOTIFICATION_AUTH_CANCELLED, source);
 }
 
+void LoginPromptBrowserTestObserver::UnregisterAll() {
+  registrar_.RemoveAll();
+}
+
 WindowedLoadStopObserver::WindowedLoadStopObserver(
     content::NavigationController* controller,
     int notification_count)