cros: Disable system tray help/lock buttons during supervised user creation

ash/system/tray/tray_popup_utils.h

Index: ash/system/tray/tray_popup_utils.h
diff --git a/ash/system/tray/tray_popup_utils.h b/ash/system/tray/tray_popup_utils.h
index 83dd125b58210f0c7f4aeccedeb232674671f7a1..a8390617346abd5b25921cf8d6c5338143c7e852 100644
--- a/ash/system/tray/tray_popup_utils.h
+++ b/ash/system/tray/tray_popup_utils.h
@@ -200,9 +200,9 @@ class TrayPopupUtils {
   static views::Separator* CreateListSubHeaderSeparator();
 
   // Returns true if it is possible to open WebUI settings in a browser window,
-  // i.e., the user is logged in, not on the lock screen, and not in a secondary
-  // account flow.
-  static bool CanOpenWebUISettings(LoginStatus status);
+  // i.e. the user is logged in, not on the lock screen, not adding a secondary
+  // user, and not in the supervised user creation flow.
+  static bool CanOpenWebUISettings();
 
   // Initializes a row in the system menu as checkable and update the check mark
   // status of this row.