Removing Nullable<unsigned long> for PeriodicSyncRegistration::m_minPeriod

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
index 5400823eb5227199ca471a50a3f619edaed41fe9..0024a79f0220092e3f8ec47be5ece0c0c03795b6 100644
--- a/Source/modules/background_sync/PeriodicSyncRegistration.h
+++ b/Source/modules/background_sync/PeriodicSyncRegistration.h
@@ -25,19 +25,15 @@ public:
 
     virtual ~PeriodicSyncRegistration();
 
-    bool hasMinPeriod() const { return !m_minPeriod.isNull(); }
-    unsigned long minPeriod() const { return m_minPeriod.get(); }
+    unsigned long minPeriod() const { return m_minPeriod; }
     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; }
 
@@ -49,7 +45,7 @@ private:
     PeriodicSyncRegistration(int64_t id, const PeriodicSyncRegistrationOptions&, ServiceWorkerRegistration*);
 
     int64_t m_id;
-    Nullable<unsigned long> m_minPeriod;
+    unsigned long m_minPeriod;
     String m_networkState;
     String m_powerState;
     String m_tag;