[Background Sync] Converting Blink code to the MVP API

Source/modules/background_sync/PeriodicSyncRegistration.h

Index: Source/modules/background_sync/PeriodicSyncRegistration.h
diff --git a/Source/modules/background_sync/PeriodicSyncRegistration.h b/Source/modules/background_sync/PeriodicSyncRegistration.h
new file mode 100644
index 0000000000000000000000000000000000000000..5400823eb5227199ca471a50a3f619edaed41fe9
--- /dev/null
+++ b/Source/modules/background_sync/PeriodicSyncRegistration.h
@@ -0,0 +1,62 @@
+// 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 PeriodicSyncRegistration_h
+#define PeriodicSyncRegistration_h
+
+#include "bindings/core/v8/ScriptPromise.h"
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "modules/background_sync/PeriodicSyncRegistrationOptions.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class ServiceWorkerRegistration;
+class ScriptPromiseResolver;
+class ScriptState;
+struct WebSyncRegistration;
+
+class PeriodicSyncRegistration final : public GarbageCollectedFinalized<PeriodicSyncRegistration>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    static PeriodicSyncRegistration* take(ScriptPromiseResolver*, WebSyncRegistration*, ServiceWorkerRegistration*);
+    static void dispose(WebSyncRegistration* registrationRaw);
+
+    virtual ~PeriodicSyncRegistration();
+
+    bool hasMinPeriod() const { return !m_minPeriod.isNull(); }
+    unsigned long minPeriod() const { return m_minPeriod.get(); }
+    void setMinPeriod(unsigned long value) { m_minPeriod = value; }
+
+    bool hasNetworkState() const { return !m_networkState.isNull(); }
+    String networkState() const { return m_networkState; }
+    void setNetworkState(String value) { m_networkState = value; }
+
+    bool hasPowerState() const { return !m_powerState.isNull(); }
+    String powerState() const { return m_powerState; }
+    void setPowerState(String value) { m_powerState = value; }
+
+    bool hasTag() const { return !m_tag.isNull(); }
+    String tag() const { return m_tag; }
+    void setTag(String value) { m_tag = value; }
+
+    ScriptPromise unregister(ScriptState*);
+
+    DECLARE_TRACE();
+
+private:
+    PeriodicSyncRegistration(int64_t id, const PeriodicSyncRegistrationOptions&, ServiceWorkerRegistration*);
+
+    int64_t m_id;
+    Nullable<unsigned long> m_minPeriod;
+    String m_networkState;
+    String m_powerState;
+    String m_tag;
+
+    Member<ServiceWorkerRegistration> m_serviceWorkerRegistration;
+};
+
+} // namespace blink
+
+#endif // PeriodicSyncRegistration_h