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

ash/system/chromeos/tray_display.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/system/chromeos/tray_display.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/display/display_manager.h"
 #include "ash/shell.h"
 #include "ash/system/system_notifier.h"
@@ skipping 104 matching lines @@
     case user::LOGGED_IN_LOCKED:
       return;
 
     case user::LOGGED_IN_USER:
     case user::LOGGED_IN_OWNER:
     case user::LOGGED_IN_GUEST:
     case user::LOGGED_IN_RETAIL_MODE:
     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();
   }
 }
 
 }  // namespace
 
 const char TrayDisplay::kNotificationId[] = "chrome://settings/display";
 
 class DisplayView : public ActionableView {
  public:
   explicit DisplayView() {
@@ skipping 302 matching lines @@
 bool TrayDisplay::GetAccessibleStateForTesting(ui::AXViewState* state) {
   views::View* view = default_;
   if (view) {
     view->GetAccessibleState(state);
     return true;
   }
   return false;
 }
 
 }  // namespace ash