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/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/system/system_notifier.h"
 #include "ash/system/tray/actionable_view.h"
 #include "ash/system/tray/fixed_sized_image_view.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/tray_notification_view.h"
 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
 #include "base/bind.h"
@@ skipping 84 matching lines @@
       continue;
     lines.push_back(GetDisplayInfoLine(id));
   }
 
   return JoinString(lines, '\n');
 }
 
 void OpenSettings() {
   // switch is intentionally introduced without default, to cause an error when
   // a new type of login status is introduced.
+  if (ash::Shell::GetInstance()->session_state_delegate()->GetSessionState() ==
+      ash::SessionStateDelegate::SESSION_STATE_LOGIN_SECONDARY)
+    return;
+
   switch (Shell::GetInstance()->system_tray_delegate()->GetUserLoginStatus()) {
     case user::LOGGED_IN_NONE:
     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:
@@ skipping 315 matching lines @@
 bool TrayDisplay::GetAccessibleStateForTesting(ui::AXViewState* state) {
   views::View* view = default_;
   if (view) {
     view->GetAccessibleState(state);
     return true;
   }
   return false;
 }
 
 }  // namespace ash