chromeos: Move device shutdown handling out of chrome into ash

ash/common/shutdown_controller.h

Index: ash/common/shutdown_controller.h
diff --git a/ash/common/shutdown_controller.h b/ash/common/shutdown_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..266af118d607e3923ec2739ed7719e759739792e
--- /dev/null
+++ b/ash/common/shutdown_controller.h
@@ -0,0 +1,49 @@
+// 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_COMMON_SHUTDOWN_CONTROLLER_H_
+#define ASH_COMMON_SHUTDOWN_CONTROLLER_H_
+
+#include "ash/ash_export.h"
+#include "ash/public/interfaces/shutdown.mojom.h"
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+
+namespace ash {
+
+// Handles actual device shutdown by making requests to powerd over D-Bus.
+// Caches the DeviceRebootOnShutdown device policy sent from Chrome over mojo.
+class ASH_EXPORT ShutdownController
+    : NON_EXPORTED_BASE(public mojom::ShutdownController) {
+ public:
+  ShutdownController();
+  ~ShutdownController() override;
+
+  bool reboot_on_shutdown() const { return reboot_on_shutdown_; }
+
+  // Shuts down or reboots based on the current DeviceRebootOnShutdown policy.
+  // Does not trigger the shutdown fade-out animation. For animated shutdown
+  // use WmShell::RequestShutdown(). Virtual for testing.
+  virtual void ShutDownOrReboot();
+
+  // Binds the mojom::ShutdownController interface request to this object.
+  void BindRequest(mojom::ShutdownControllerRequest request);
+
+ private:
+  // mojom::ShutdownController:
+  void SetRebootOnShutdown(bool reboot_on_shutdown) override;
+
+  // Cached copy of the DeviceRebootOnShutdown policy from chrome.
+  bool reboot_on_shutdown_ = false;
+
+  // Bindings for the ShutdownController interface.
+  mojo::BindingSet<mojom::ShutdownController> bindings_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShutdownController);
+};
+
+}  // namespace ash
+
+#endif  // ASH_COMMON_SHUTDOWN_CONTROLLER_H_