Fixed UI stuck on Network screen after rebooting on FRE screen

chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h

Index: chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h
diff --git a/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h b/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h
index 004ddb1e38086bf006df061c99a3cfe9d914b76b..6c5946fccbadf198b019bc17e7abf9243a50113a 100644
--- a/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h
+++ b/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h
@@ -15,6 +15,7 @@
 #include "chrome/browser/browsing_data/browsing_data_remover.h"
 #include "chrome/browser/chromeos/login/enrollment/enrollment_screen_actor.h"
 #include "chrome/browser/chromeos/login/ui/webui_login_view.h"
+#include "chrome/browser/extensions/signin/scoped_gaia_auth_extension.h"
 #include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
 #include "chrome/browser/ui/webui/chromeos/login/network_state_informer.h"
 
@@ -148,6 +149,9 @@ class EnrollmentScreenHandler
 
   scoped_ptr<ErrorScreensHistogramHelper> histogram_helper_;
 
+  // GAIA extension loader.
+  scoped_ptr<ScopedGaiaAuthExtension> auth_extension_;
+
   base::WeakPtrFactory<EnrollmentScreenHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EnrollmentScreenHandler);