[BackgroundSync] Add browser side support for SyncRegistration.done

content/browser/background_sync/background_sync_registration_handle.cc

 // 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.
 
 #include "content/browser/background_sync/background_sync_registration_handle.h"
 
 #include "content/browser/background_sync/background_sync_manager.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace content {
 
 BackgroundSyncRegistrationHandle::~BackgroundSyncRegistrationHandle() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (IsValid() && background_sync_manager_)
     background_sync_manager_->ReleaseRegistrationHandle(handle_id_);
 }
 
 void BackgroundSyncRegistrationHandle::Unregister(
     int64_t sw_registration_id,
     const StatusCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK(IsValid());
   DCHECK(background_sync_manager_);
 
   background_sync_manager_->Unregister(
       sw_registration_id, options()->periodicity, handle_id_, callback);
 }
 
+void BackgroundSyncRegistrationHandle::NotifyWhenDone(
+    const StatusAndStateCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  DCHECK(IsValid());
+  DCHECK(background_sync_manager_);
+
+  background_sync_manager_->NotifyWhenDone(handle_id_, callback);
+}
+
 bool BackgroundSyncRegistrationHandle::IsValid() const {
   return registration_ != nullptr;
 }
 
 BackgroundSyncRegistrationHandle::BackgroundSyncRegistrationHandle(
     base::WeakPtr<BackgroundSyncManager> background_sync_manager,
     HandleId handle_id)
     : background_sync_manager_(background_sync_manager),
       handle_id_(handle_id),
       registration_(
           background_sync_manager_->GetRegistrationForHandle(handle_id_)) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK(background_sync_manager_);
 }
 
 }  // namespace content