Shows the display info as a popup when a new display is connected.

ash/system/tray/tray_notification_view.h

 // 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.
 
 #ifndef ASH_SYSTEM_TRAY_TRAY_NOTIFICATION_VIEW_H_
 #define ASH_SYSTEM_TRAY_TRAY_NOTIFICATION_VIEWS_H_
 
+#include "base/timer.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/slide_out_view.h"
 
 namespace gfx {
 class ImageSkia;
 }
 
 namespace views {
 class ImageView;
 }
@@ skipping 26 matching lines @@
   // Gets the icons image.
   const gfx::ImageSkia& GetIconImage() const;
 
   // Replaces the contents view.
   void UpdateView(views::View* new_contents);
 
   // Replaces the contents view and updates the icon image.
   void UpdateViewAndImage(views::View* new_contents,
                           const gfx::ImageSkia& image);
 
+  // Autoclose timer operations.
+  void StartAutoCloseTimer(int seconds);
+  void StopAutoCloseTimer();
+  void RestartAutoCloseTimer();
+
   // Overridden from ButtonListener.
   virtual void ButtonPressed(views::Button* sender,
                              const ui::Event& event) OVERRIDE;
 
   // Overridden from views::View.
   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
 
   // Overridden from ui::EventHandler.
   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
  protected:
   // Called when the close button is pressed. Does nothing by default.
   virtual void OnClose();
   // Called when the notification is clicked on. Does nothing by default.
   virtual void OnClickAction();
 
   // Overridden from views::SlideOutView.
   virtual void OnSlideOut() OVERRIDE;
 
   SystemTrayItem* owner() { return owner_; }
 
  private:
   void HandleClose();
   void HandleClickAction();
 
   SystemTrayItem* owner_;
   int icon_id_;
   views::ImageView* icon_;
 
+  int autoclose_delay_;
+  base::OneShotTimer<TrayNotificationView> autoclose_;
+
   DISALLOW_COPY_AND_ASSIGN(TrayNotificationView);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_TRAY_NOTIFICATION_VIEWS_H_