Signin screen and locked screen status area focus advancing

chrome/browser/chromeos/login/ui/webui_login_view.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_UI_WEBUI_LOGIN_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_UI_WEBUI_LOGIN_VIEW_H_
 
 #include <map>
 #include <string>
 
@@ skipping 144 matching lines @@
   // True when the WebUI has finished initializing and is visible.
   bool webui_visible_;
 
   // Should we emit the login-prompt-visible signal when the login page is
   // displayed?
   bool should_emit_login_prompt_visible_;
 
   // True to forward keyboard event.
   bool forward_keyboard_event_;
 
+  // A FocusTraversable for StatusAreaWidget that uses
+  // |status_area_widget_host_| as placeholder in WebUiLoginView's focus chain.
+  class StatusAreaFocusTraversable;
+  std::unique_ptr<StatusAreaFocusTraversable> status_area_focus_traversable_;
+  views::View* status_area_widget_host_ = nullptr;
+
+  // A FocusTraversable for WebUILoginView that loops back at the end of its
+  // focus chain.
+  class CycleFocusTraversable;
+  std::unique_ptr<CycleFocusTraversable> cycle_focus_traversable_;
+
   base::ObserverList<web_modal::ModalDialogHostObserver> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(WebUILoginView);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UI_WEBUI_LOGIN_VIEW_H_