Screensaver at login screen.

chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.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 CHROME_BROWSER_CHROMEOS_KIOSK_MODE_KIOSK_MODE_SCREENSAVER_H_
+#define CHROME_BROWSER_CHROMEOS_KIOSK_MODE_KIOSK_MODE_SCREENSAVER_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "chrome/browser/chromeos/dbus/power_manager_client.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+namespace chromeos {
+
+class KioskModeScreensaverObserver : public PowerManagerClient::Observer,
+                                     public content::NotificationObserver {
+ public:
+  KioskModeScreensaverObserver();
+
+  // NotificationObserver overrides:
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+  // PowerManagerClient::Observer overrides:
+  virtual void IdleNotify(int64 threshold) OVERRIDE;
+  virtual void ActiveNotify() OVERRIDE;
+
+ private:
+  friend class KioskModeScreensaverTest;
+  content::NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(KioskModeScreensaverObserver);
+};
+
+class KioskModeScreensaver {

[sky, 2012/02/24 05:03:53]

Why bother with an extra class here? Why not rename Observer to
KioskModeScreensaver?

[rkc, 2012/02/25 02:14:02]

Done.

+ public:
+  static void InitClass();
+
+ private:
+  KioskModeScreensaver() {}
+
+  DISALLOW_COPY_AND_ASSIGN(KioskModeScreensaver);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_KIOSK_MODE_KIOSK_MODE_SCREENSAVER_H_