Signin screen and locked screen status area focus advancing

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

Index: chrome/browser/chromeos/login/ui/webui_login_view.h
diff --git a/chrome/browser/chromeos/login/ui/webui_login_view.h b/chrome/browser/chromeos/login/ui/webui_login_view.h
index e6a337b5860be059e7996f2087f3341520c9afbe..1f4b3f30aec1adea5d5408b4b6cf7b3c0500d85b 100644
--- a/chrome/browser/chromeos/login/ui/webui_login_view.h
+++ b/chrome/browser/chromeos/login/ui/webui_login_view.h
@@ -21,6 +21,10 @@
 
 class GURL;
 
+namespace ash {
+class StatusAreaWidgetDelegate;
+}
+
 namespace content {
 class WebUI;
 }
@@ -141,6 +145,9 @@ class WebUILoginView : public views::View,
   // 2. Notifies OOBE/sign classes.
   void OnLoginPromptVisible();
 
+  // Return if status area widget delegate exists, otherwise nullptr.
+  ash::StatusAreaWidgetDelegate* GetStatusAreaWidgetDelegate();

[xiyuan, 2016/09/13 21:48:08]

Move this to cc file in anonymous namespace since it is impl detail and outside
world does not need to know about it.

[Qiang(Joe) Xu, 2016/09/13 21:54:57]

done

+
   content::NotificationRegistrar registrar_;
 
   // Converts keyboard events on the WebContents to accelerators.
@@ -162,6 +169,17 @@ class WebUILoginView : public views::View,
   // 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);