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diff --git a/chromium/ash/wm/power_button_controller.h b/chromium/ash/wm/power_button_controller.h
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+++ b/chromium/ash/wm/power_button_controller.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 ASH_WM_POWER_BUTTON_CONTROLLER_H_
+#define ASH_WM_POWER_BUTTON_CONTROLLER_H_
+
+#include "ash/ash_export.h"
+#include "ash/wm/session_state_animator.h"
+#include "base/basictypes.h"
+
+namespace gfx {
+class Rect;
+class Size;
+}
+
+namespace ui {
+class Layer;
+}
+
+namespace ash {
+
+namespace test {
+class PowerButtonControllerTest;
+}
+
+class LockStateController;
+
+// Displays onscreen animations and locks or suspends the system in response to
+// the power button being pressed or released.
+class ASH_EXPORT PowerButtonController {
+ public:
+
+  explicit PowerButtonController(LockStateController* controller);
+  virtual ~PowerButtonController();
+
+  void set_has_legacy_power_button_for_test(bool legacy) {
+    has_legacy_power_button_ = legacy;
+  }
+
+  // Called when the current screen brightness changes.
+  void OnScreenBrightnessChanged(double percent);
+
+  // Called when the power or lock buttons are pressed or released.
+  void OnPowerButtonEvent(bool down, const base::TimeTicks& timestamp);
+  void OnLockButtonEvent(bool down, const base::TimeTicks& timestamp);
+
+ private:
+  friend class test::PowerButtonControllerTest;
+
+  // Are the power or lock buttons currently held?
+  bool power_button_down_;
+  bool lock_button_down_;
+
+  // Is the screen currently turned off?
+  bool screen_is_off_;
+
+  // Was a command-line switch set telling us that we're running on hardware
+  // that misreports power button releases?
+  bool has_legacy_power_button_;
+
+  LockStateController* controller_; // Not owned.
+
+  DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
+};
+
+}  // namespace ash
+
+#endif  // ASH_WM_POWER_BUTTON_CONTROLLER_H_