Remove InterfaceRegistry/Provider from service workers

third_party/WebKit/public/platform/modules/background_sync/background_sync.mojom

 // Copyright 2015 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.
 
 module blink.mojom;
 
 import "mojo/common/common_custom_types.mojom";
-import "third_party/WebKit/public/platform/modules/serviceworker/service_worker_event_status.mojom";
 
 enum BackgroundSyncNetworkState {
   ANY,
   AVOID_CELLULAR,
   ONLINE,
   MAX=ONLINE
 };
 
 struct SyncRegistration {
   int64 id = -1;
@@ skipping 21 matching lines @@
   IS_NOT_LAST_CHANCE,
   IS_LAST_CHANCE
 };
 
 interface BackgroundSyncService {
   Register(SyncRegistration options, int64 service_worker_registration_id)
       => (BackgroundSyncError err, SyncRegistration options);
   GetRegistrations(int64 service_worker_registration_id)
       => (BackgroundSyncError err, array<SyncRegistration> registrations);
 };
-
-interface BackgroundSyncServiceClient {
-  Sync(string tag, BackgroundSyncEventLastChance last_chance)
-      => (ServiceWorkerEventStatus status,
-          mojo.common.mojom.Time dispatch_event_time);
-};