Tablet-like power button behavior on Convertible/Tablet ChromeOS devices

ash/wm/tablet_power_state_delegate_chromeos.h

Index: ash/wm/tablet_power_state_delegate_chromeos.h
diff --git a/ash/wm/tablet_power_state_delegate_chromeos.h b/ash/wm/tablet_power_state_delegate_chromeos.h
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index 0000000000000000000000000000000000000000..6b89842748182d3ab62042544cd9338b198c5a6e
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+++ b/ash/wm/tablet_power_state_delegate_chromeos.h
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+// Copyright 2016 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_TABLET_POWER_STATE_DELEGATE_CHROMEOS_H_
+#define ASH_WM_TABLET_POWER_STATE_DELEGATE_CHROMEOS_H_
+
+#include "ash/ash_export.h"
+#include "ash/wm/power_button_controller.h"
+#include "base/macros.h"
+
+namespace ash {
+
+class ASH_EXPORT TabletPowerStateDelegateChromeos
+    : public TabletPowerStateDelegate {
+ public:
+  TabletPowerStateDelegateChromeos();
+  ~TabletPowerStateDelegateChromeos() override;
+
+  // TabletPowerStateDelegate:
+  void SetBacklightsForcedOff(bool forced_off) override;
+  void GetBacklightsForcedOff(
+      const base::Callback<void(bool)>& callback) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TabletPowerStateDelegateChromeos);
+};
+
+}  // namespace ash
+
+#endif  // ASH_WM_TABLET_POWER_STATE_DELEGATE_CHROMEOS_H_