[BackgroundSync Cleanup] Remove periodic sync code

content/common/background_sync_service.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 content;
 
 import "content/public/common/background_sync.mojom";
 import "content/public/common/permission_status.mojom";
 import "content/public/common/service_worker_event_status.mojom";
 
@@ skipping 18 matching lines @@
 
 enum BackgroundSyncEventLastChance {
   IS_NOT_LAST_CHANCE,
   IS_LAST_CHANCE
 };
 
 interface BackgroundSyncService {
   Register(SyncRegistration options, int64 service_worker_registration_id,
            bool requested_from_service_worker)
       => (BackgroundSyncError err, SyncRegistration options);
-  GetRegistration(BackgroundSyncPeriodicity periodicity, string tag,
-                  int64 service_worker_registration_id)
+  GetRegistration(string tag, int64 service_worker_registration_id)
       => (BackgroundSyncError err, SyncRegistration? registration);
-  GetRegistrations(BackgroundSyncPeriodicity periodicity,
-                   int64 service_worker_registration_id)
+  GetRegistrations(int64 service_worker_registration_id)
       => (BackgroundSyncError err, array<SyncRegistration> registrations);
   Unregister(int64 handle_id, int64 service_worker_registration_id)
       => (BackgroundSyncError err);
-  GetPermissionStatus(BackgroundSyncPeriodicity periodicity,
-                      int64 service_worker_registration_id)
+  GetPermissionStatus(int64 service_worker_registration_id)
       => (BackgroundSyncError err, PermissionStatus status);
   DuplicateRegistrationHandle(int64 handle_id)
       => (BackgroundSyncError err, SyncRegistration? registration);
   ReleaseRegistration(int64 handle_id);
   NotifyWhenFinished(int64 handle_id) => (BackgroundSyncError err, BackgroundSyncState final_status);
 };
 
 interface BackgroundSyncServiceClient {
   Sync(int64 handle_id, BackgroundSyncEventLastChance last_chance)
       => (ServiceWorkerEventStatus status);
 };