device: Cleanup class/struct forward declarations

device/bluetooth/dbus/bluez_dbus_manager.h

 // 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 DEVICE_BLUETOOTH_DBUS_BLUEZ_DBUS_MANAGER_H_
 #define DEVICE_BLUETOOTH_DBUS_BLUEZ_DBUS_MANAGER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "device/bluetooth/bluetooth_export.h"
 #include "device/bluetooth/dbus/bluetooth_dbus_client_bundle.h"
 
 namespace dbus {
 class Bus;
-class ObjectPath;
 class Response;
 class ErrorResponse;
 }  // namespace dbus
 
 namespace bluez {
 
 // Style Note: Clients are sorted by names.
 class BluetoothAdapterClient;
 class BluetoothAgentManagerClient;
 class BluetoothDeviceClient;
@@ skipping 144 matching lines @@
   friend class BluezDBusManager;
 
   BluezDBusManagerSetter();
 
   DISALLOW_COPY_AND_ASSIGN(BluezDBusManagerSetter);
 };
 
 }  // namespace bluez
 
 #endif  // DEVICE_BLUETOOTH_DBUS_BLUEZ_DBUS_MANAGER_H_