Add the ability to show a demo app on OOBE if a machine is derelict.

chrome/browser/chromeos/idle_detector.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_IDLE_DETECTOR_H_
+#define CHROME_BROWSER_CHROMEOS_IDLE_DETECTOR_H_
+
+#include "ash/wm/user_activity_observer.h"
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/timer/timer.h"
+
+namespace chromeos {
+
+class IdleDetector : public ash::UserActivityObserver {
+ public:
+  IdleDetector(const base::Closure& on_active_callback,
+               const base::Closure& on_idle_callback);
+  virtual ~IdleDetector();
+
+  void Start(const base::TimeDelta& timeout);
+
+ private:
+  // UserActivityObserver overrides:
+  virtual void OnUserActivity(const ui::Event* event) OVERRIDE;
+
+  // Resets |timer_| to fire when the logout dialog should be shown.

[xiyuan, 2014/02/11 03:42:45]

nit: update the comment

[rkc, 2014/02/11 04:35:57]

Done.

+  void ResetTimer();
+
+  base::OneShotTimer<IdleDetector> timer_;
+
+  base::Closure active_callback_;
+  base::Closure idle_callback_;
+
+  base::TimeDelta timeout_;
+
+  DISALLOW_COPY_AND_ASSIGN(IdleDetector);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_IDLE_DETECTOR_H_