[Background Sync] Converting Blink code to the MVP API

Source/modules/background_sync/ServiceWorkerRegistrationSync.h

 // 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.
 
 #ifndef ServiceWorkerRegistrationSync_h
 #define ServiceWorkerRegistrationSync_h
 
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class SyncManager;
+class PeriodicSyncManager;
 class ServiceWorkerRegistration;
 
 class ServiceWorkerRegistrationSync final : public GarbageCollectedFinalized<ServiceWorkerRegistrationSync>, public HeapSupplement<ServiceWorkerRegistration> {
     USING_GARBAGE_COLLECTED_MIXIN(ServiceWorkerRegistrationSync);
     WTF_MAKE_NONCOPYABLE(ServiceWorkerRegistrationSync);
 public:
     virtual ~ServiceWorkerRegistrationSync();
     static ServiceWorkerRegistrationSync& from(ServiceWorkerRegistration&);
 
-    static SyncManager* syncManager(ServiceWorkerRegistration&);
-    SyncManager* syncManager();
+    static SyncManager* sync(ServiceWorkerRegistration&);
+    static PeriodicSyncManager* periodicSync(ServiceWorkerRegistration&);
+    SyncManager* sync();
+    PeriodicSyncManager* periodicSync();
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit ServiceWorkerRegistrationSync(ServiceWorkerRegistration*);
     static const char* supplementName();
 
     Member<ServiceWorkerRegistration> m_registration;
     Member<SyncManager> m_syncManager;
+    Member<PeriodicSyncManager> m_periodicSyncManager;
 };
 
 } // namespace blink
 
 #endif // ServiceWorkerRegistrationSync_h