Tray elements behave appropriately on the multiple signin screen (more like lock screen)

ash/system/chromeos/tray_display.cc

Index: ash/system/chromeos/tray_display.cc
diff --git a/ash/system/chromeos/tray_display.cc b/ash/system/chromeos/tray_display.cc
index d1fca840b306824d4b9d3f5caa81f5400a5f7b7c..d8cafb9668bde9ad1ad1b2087fff72b8b2caa12c 100644
--- a/ash/system/chromeos/tray_display.cc
+++ b/ash/system/chromeos/tray_display.cc
@@ -122,7 +122,10 @@ void OpenSettings() {
     case user::LOGGED_IN_PUBLIC:
     case user::LOGGED_IN_SUPERVISED:
     case user::LOGGED_IN_KIOSK_APP:
-      Shell::GetInstance()->system_tray_delegate()->ShowDisplaySettings();
+      ash::SystemTrayDelegate* delegate =
+          Shell::GetInstance()->system_tray_delegate();
+      if (delegate->ShouldShowSettings())
+        delegate->ShowDisplaySettings();
   }
 }