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diff --git a/chrome/browser/chromeos/power/video_activity_notifier.h b/chrome/browser/chromeos/power/video_activity_notifier.h
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+++ b/chrome/browser/chromeos/power/video_activity_notifier.h
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+// 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_POWER_VIDEO_ACTIVITY_NOTIFIER_H_
+#define CHROME_BROWSER_CHROMEOS_POWER_VIDEO_ACTIVITY_NOTIFIER_H_
+
+#include "ash/wm/video_detector.h"
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/time/time.h"
+
+namespace chromeos {
+
+// Notifies the power manager when a video is playing.
+class VideoActivityNotifier : public ash::VideoDetectorObserver {
+ public:
+  VideoActivityNotifier();
+  virtual ~VideoActivityNotifier();
+
+  // ash::VideoDetectorObserver implementation.
+  virtual void OnVideoDetected(bool is_fullscreen) OVERRIDE;
+
+ private:
+  // Last time that the power manager was notified.
+  base::TimeTicks last_notify_time_;
+
+  DISALLOW_COPY_AND_ASSIGN(VideoActivityNotifier);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_POWER_VIDEO_ACTIVITY_NOTIFIER_H_