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diff --git a/chrome/browser/chromeos/power/output_observer.h b/chrome/browser/chromeos/power/output_observer.h
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+++ b/chrome/browser/chromeos/power/output_observer.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_OUTPUT_OBSERVER_H_
+#define CHROME_BROWSER_CHROMEOS_POWER_OUTPUT_OBSERVER_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "chromeos/dbus/power_manager_client.h"
+
+namespace chromeos {
+
+// This observer listens for when video outputs have been turned off so that the
+// corresponding CRTCs can be disabled to force the connected output off.
+class OutputObserver : public PowerManagerClient::Observer {
+ public:
+  // This class registers/unregisters itself as an observer in ctor/dtor.
+  OutputObserver();
+  virtual ~OutputObserver();
+
+ private:
+  // PowerManagerClient::Observer implementation.
+  virtual void ScreenPowerSet(bool power_on, bool all_displays) OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(OutputObserver);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_POWER_OUTPUT_OBSERVER_H_