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

ash/system/chromeos/session/logout_button_tray.cc

Index: ash/system/chromeos/session/logout_button_tray.cc
diff --git a/ash/system/chromeos/session/logout_button_tray.cc b/ash/system/chromeos/session/logout_button_tray.cc
index ffd322a0b0565a5bb2d1e0f8959aad32c94449d7..892121455e20276487b32ad2988201e371d20f99 100644
--- a/ash/system/chromeos/session/logout_button_tray.cc
+++ b/ash/system/chromeos/session/logout_button_tray.cc
@@ -4,6 +4,7 @@
 
 #include "ash/system/chromeos/session/logout_button_tray.h"
 
+#include "ash/session/session_state_delegate.h"
 #include "ash/shelf/shelf_types.h"
 #include "ash/shell.h"
 #include "ash/system/chromeos/session/logout_confirmation_controller.h"
@@ -157,9 +158,11 @@ void LogoutButtonTray::UpdateAfterLoginStatusChange(
 }
 
 void LogoutButtonTray::UpdateVisibility() {
-  SetVisible(show_logout_button_in_tray_ &&
-             login_status_ != user::LOGGED_IN_NONE &&
-             login_status_ != user::LOGGED_IN_LOCKED);
+  SetVisible(
+      show_logout_button_in_tray_ && login_status_ != user::LOGGED_IN_NONE &&
+      login_status_ != user::LOGGED_IN_LOCKED &&
+      ash::Shell::GetInstance()->session_state_delegate()->GetSessionState() !=
+          ash::SessionStateDelegate::SESSION_STATE_LOGIN_SECONDARY);
 }
 
 }  // namespace ash