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

ash/wm/tablet_power_state_delegate_chromeos.cc

Index: ash/wm/tablet_power_state_delegate_chromeos.cc
diff --git a/ash/wm/tablet_power_state_delegate_chromeos.cc b/ash/wm/tablet_power_state_delegate_chromeos.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b9ff969d42a7567c7ee2488e88dc982e9f582115
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+++ b/ash/wm/tablet_power_state_delegate_chromeos.cc
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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.
+
+#include "ash/wm/tablet_power_state_delegate_chromeos.h"
+
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/power_manager_client.h"
+
+namespace ash {
+
+TabletPowerStateDelegateChromeos::TabletPowerStateDelegateChromeos() {}
+
+TabletPowerStateDelegateChromeos::~TabletPowerStateDelegateChromeos() {}
+
+void TabletPowerStateDelegateChromeos::SetBacklightsForcedOff(bool forced_off) {
+  chromeos::DBusThreadManager::Get()
+      ->GetPowerManagerClient()
+      ->SetBacklightsForcedOff(forced_off);
+}
+
+void TabletPowerStateDelegateChromeos::GetBacklightsForcedOff(
+    const base::Callback<void(bool)>& callback) {
+  chromeos::DBusThreadManager::Get()
+      ->GetPowerManagerClient()
+      ->GetBacklightsForcedOff(callback);
+}
+
+}  // namespace ash