Implement DBus changes needed for notifications.

device/bluetooth/dbus/bluetooth_gatt_service_service_provider_impl.h

 // 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 DEVICE_BLUETOOTH_DBUS_BLUETOOTH_GATT_SERVICE_SERVICE_PROVIDER_IMPL_H_
 #define DEVICE_BLUETOOTH_DBUS_BLUETOOTH_GATT_SERVICE_SERVICE_PROVIDER_IMPL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/platform_thread.h"
 #include "dbus/bus.h"
 #include "dbus/exported_object.h"
 #include "dbus/message.h"
 #include "dbus/object_path.h"
 #include "device/bluetooth/bluetooth_export.h"
 #include "device/bluetooth/dbus/bluetooth_gatt_service_service_provider.h"
 
 namespace bluez {
 
 // The BluetoothGattServiceServiceProvider implementation used in production.
 class DEVICE_BLUETOOTH_EXPORT BluetoothGattServiceServiceProviderImpl
     : public BluetoothGattServiceServiceProvider {
  public:
+  // Use nullptr for |bus| to create for testing.
   BluetoothGattServiceServiceProviderImpl(
       dbus::Bus* bus,
       const dbus::ObjectPath& object_path,
       const std::string& uuid,
       bool is_primary,
       const std::vector<dbus::ObjectPath>& includes);
 
   ~BluetoothGattServiceServiceProviderImpl() override;
 
  private:
@@ skipping 54 matching lines @@
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<BluetoothGattServiceServiceProviderImpl>
       weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothGattServiceServiceProviderImpl);
 };
 
 }  // namespace bluez
 
 #endif  // DEVICE_BLUETOOTH_DBUS_BLUETOOTH_GATT_SERVICE_SERVICE_PROVIDER_IMPL_H_