[Signin Error Dialog] (3/3) Added the triggering code

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 4a25e9dded5bdd8ef632e313d192844cc1462b55..4b83cae2f7d494bcdd0f42aa08d2d8692e4e6707 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -931,6 +931,10 @@ void Browser::ShowModalSyncConfirmationWindow() {
   signin_view_controller_.ShowModalSyncConfirmationDialog(this);
 }
 
+void Browser::ShowModalSigninErrorWindow() {
+  signin_view_controller_.ShowModalSigninErrorDialog(this);
+}
+
 void Browser::RegisterKeepAlive() {
   keep_alive_.reset(new ScopedKeepAlive(KeepAliveOrigin::BROWSER,
                                         KeepAliveRestartOption::DISABLED));