Add test for showing confirmation dialog for unsecure signin

chrome/browser/ui/webui/signin/login_ui_service.cc

Index: chrome/browser/ui/webui/signin/login_ui_service.cc
diff --git a/chrome/browser/ui/webui/signin/login_ui_service.cc b/chrome/browser/ui/webui/signin/login_ui_service.cc
index b01cc0dddf21e5ef0710bc923d6a975213f25c4b..dae7d896648d71f44a27615c57469710a635712f 100644
--- a/chrome/browser/ui/webui/signin/login_ui_service.cc
+++ b/chrome/browser/ui/webui/signin/login_ui_service.cc
@@ -47,6 +47,10 @@ void LoginUIService::LoginUIClosed(LoginUI* ui) {
   FOR_EACH_OBSERVER(Observer, observer_list_, OnLoginUIClosed(ui));
 }
 
+void LoginUIService::UntrustedSigninUIShown() {
+  FOR_EACH_OBSERVER(Observer, observer_list_, UntrustedSigninUIShown());
+}
+
 void LoginUIService::ShowLoginPopup() {
 #if defined(OS_CHROMEOS)
   if (chrome::IsRunningInForcedAppMode())