Display error message when user try to open a locked supervised user profile when force-sign-in is …

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

Index: chrome/browser/ui/webui/signin/signin_error_ui.cc
diff --git a/chrome/browser/ui/webui/signin/signin_error_ui.cc b/chrome/browser/ui/webui/signin/signin_error_ui.cc
index 79b2e445a840255ea44ffde088bf868fe1941daf..4930073850af9fdaf68b9a1d85af67fdea6ff5e1 100644
--- a/chrome/browser/ui/webui/signin/signin_error_ui.cc
+++ b/chrome/browser/ui/webui/signin/signin_error_ui.cc
@@ -42,6 +42,9 @@ SigninErrorUI::SigninErrorUI(content::WebUI* web_ui,
   if (is_system_profile) {
     signin_profile = g_browser_process->profile_manager()->GetProfileByPath(
         UserManager::GetSigninProfilePath());
+    // Sign in is completed before profile creation.
+    if (!signin_profile)
+      signin_profile = webui_profile->GetOriginalProfile();
   } else {
     signin_profile = webui_profile;
   }