Implement DBus changes needed for notifications.

device/bluetooth/dbus/bluetooth_gatt_service_service_provider_impl.cc

 // 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 "device/bluetooth/dbus/bluetooth_gatt_service_service_provider_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
@@ skipping 16 matching lines @@
         const std::vector<dbus::ObjectPath>& includes)
     : origin_thread_id_(base::PlatformThread::CurrentId()),
       uuid_(uuid),
       is_primary_(is_primary),
       includes_(includes),
       bus_(bus),
       object_path_(object_path),
       weak_ptr_factory_(this) {
   VLOG(1) << "Creating Bluetooth GATT service: " << object_path_.value()
           << " UUID: " << uuid;
-
-  // If we have a null bus, this means that this is being initialized for a
-  // test, hence we shouldn't do any other setup.
   if (!bus_)
     return;
 
   DCHECK(!uuid_.empty());
   DCHECK(object_path_.IsValid());
 
   exported_object_ = bus_->GetExportedObject(object_path_);
 
   exported_object_->ExportMethod(
       dbus::kDBusPropertiesInterface, dbus::kDBusPropertiesGet,
@@ skipping 174 matching lines @@
   LOG_IF(WARNING, !success) << "Failed to export " << interface_name << "."
                             << method_name;
 }
 
 const dbus::ObjectPath& BluetoothGattServiceServiceProviderImpl::object_path()
     const {
   return object_path_;
 }
 
 }  // namespace bluez