chromeos: Add DisplayPowerServiceProvider.

chrome/browser/chromeos/dbus/display_power_service_provider.h

+// Copyright (c) 2013 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_DBUS_DISPLAY_POWER_SERVICE_PROVIDER_H_
+#define CHROME_BROWSER_CHROMEOS_DBUS_DISPLAY_POWER_SERVICE_PROVIDER_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "chrome/browser/chromeos/dbus/cros_dbus_service.h"
+#include "dbus/exported_object.h"
+
+namespace dbus {
+class MethodCall;
+class Response;
+}
+
+namespace chromeos {
+
+// This class exports a "SetDisplayPower" D-Bus method that the power
+// manager calls to instruct Chrome to turn various displays on or off.
+class DisplayPowerServiceProvider
+    : public CrosDBusService::ServiceProviderInterface {
+ public:
+  DisplayPowerServiceProvider();
+  virtual ~DisplayPowerServiceProvider();
+
+  // CrosDBusService::ServiceProviderInterface overrides:
+  virtual void Start(
+      scoped_refptr<dbus::ExportedObject> exported_object) OVERRIDE;
+
+ private:
+  // Called from ExportedObject when SetDisplayPower() is exported as a D-Bus
+  // method or failed to be exported.
+  void OnExported(const std::string& interface_name,
+                  const std::string& method_name,
+                  bool success);
+
+  // Called on UI thread in response to a D-Bus request.
+  void SetDisplayPower(dbus::MethodCall* method_call,
+                       dbus::ExportedObject::ResponseSender response_sender);
+
+  // Keep this last so that all weak pointers will be invalidated at the
+  // beginning of destruction.
+  base::WeakPtrFactory<DisplayPowerServiceProvider> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(DisplayPowerServiceProvider);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_DBUS_DISPLAY_POWER_SERVICE_PROVIDER_H_