Drop document.createEvent support for things still behind a flag

third_party/WebKit/Source/modules/payments/PaymentRequestUpdateEvent.h

 // Copyright 2016 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 PaymentRequestUpdateEvent_h
 #define PaymentRequestUpdateEvent_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/events/Event.h"
 #include "modules/ModulesExport.h"
 #include "modules/payments/PaymentRequestUpdateEventInit.h"
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class ExceptionState;
 class PaymentUpdater;
 class ScriptState;
 
 class MODULES_EXPORT PaymentRequestUpdateEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 
 public:
     ~PaymentRequestUpdateEvent() override;
 
-    static PaymentRequestUpdateEvent* create();
     static PaymentRequestUpdateEvent* create(const AtomicString& type, const PaymentRequestUpdateEventInit& = PaymentRequestUpdateEventInit());
 
     void setPaymentDetailsUpdater(PaymentUpdater*);
 
     void updateWith(ScriptState*, ScriptPromise, ExceptionState&);
 
     void onTimerFired(TimerBase*);
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    PaymentRequestUpdateEvent();
     PaymentRequestUpdateEvent(const AtomicString& type, const PaymentRequestUpdateEventInit&);
 
     Member<PaymentUpdater> m_updater;
     bool m_waitForUpdate;
     Timer<PaymentRequestUpdateEvent> m_abortTimer;
 };
 
 } // namespace blink
 
 #endif // PaymentRequestUpdateEvent_h