Fix of "login is not defined" error in OOBE

chrome/browser/ui/webui/chromeos/login/base_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/base_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/base_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/base_screen_handler.cc
index db8cd3413ebf40df1ee75452bb69a1fef4de5249..567594735766132428bdac4d3e134513b11c5939 100644
--- a/chrome/browser/ui/webui/chromeos/login/base_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/base_screen_handler.cc
@@ -19,8 +19,15 @@ namespace {
 const char kMethodContextChanged[] = "contextChanged";
 }  // namespace
 
+JSCallsContainer::JSCallsContainer() = default;
+
+JSCallsContainer::~JSCallsContainer() = default;
+
 BaseScreenHandler::BaseScreenHandler() = default;
 
+BaseScreenHandler::BaseScreenHandler(JSCallsContainer* js_calls_container)
+    : js_calls_container_(js_calls_container) {}
+
 BaseScreenHandler::~BaseScreenHandler() {
   if (base_screen_)
     base_screen_->set_model_view_channel(nullptr);
@@ -121,4 +128,12 @@ void BaseScreenHandler::HandleContextChanged(
     base_screen_->OnContextChanged(*diff);
 }
 
+void BaseScreenHandler::ExecuteDeferredJSCalls() {
+  DCHECK(!js_calls_container_->is_initialized());
+  js_calls_container_->mark_initialized();
+  for (const auto& deferred_js_call : js_calls_container_->deferred_js_calls())
+    deferred_js_call.Run();
+  js_calls_container_->deferred_js_calls().clear();
+}
+
 }  // namespace chromeos