[BackgroundSync Cleanup] Remove periodic sync code

content/browser/background_sync/background_sync_browsertest.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 <stdint.h>
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 67 matching lines @@
 void OneShotPendingDidGetSWRegistration(
     const scoped_refptr<BackgroundSyncContext> sync_context,
     const std::string& tag,
     const base::Callback<void(bool)>& callback,
     ServiceWorkerStatusCode status,
     const scoped_refptr<ServiceWorkerRegistration>& registration) {
   ASSERT_EQ(SERVICE_WORKER_OK, status);
   int64_t service_worker_id = registration->id();
   BackgroundSyncManager* sync_manager = sync_context->background_sync_manager();
   sync_manager->GetRegistration(
-      service_worker_id, tag, SYNC_ONE_SHOT,
+      service_worker_id, tag,
       base::Bind(&OneShotPendingDidGetSyncRegistration, callback));
 }
 
 void OneShotPendingOnIOThread(
     const scoped_refptr<BackgroundSyncContext> sync_context,
     const scoped_refptr<ServiceWorkerContextWrapper> sw_context,
     const std::string& tag,
     const GURL& url,
     const base::Callback<void(bool)>& callback) {
   sw_context->FindReadyRegistrationForDocument(
@@ skipping 558 matching lines @@
   GURL url = alt_server.GetURL(kRegisterSyncURL);
   EXPECT_TRUE(
       RunScript(BuildScriptString("registerOneShotFromCrossOriginServiceWorker",
                                   url.spec()),
                 &script_result));
   EXPECT_EQ(BuildExpectedResult("worker", "failed to register sync"),
             script_result);
 }
 
 }  // namespace content