Drop document.createEvent support for things still behind a flag

third_party/WebKit/Source/modules/sensor/SensorErrorEvent.cpp

 // 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.
 
 #include "modules/sensor/SensorErrorEvent.h"
 
 #include "bindings/core/v8/V8Binding.h"
 #include <v8.h>
 
 namespace blink {
 
 SensorErrorEvent::~SensorErrorEvent()
 {
 }
 
-SensorErrorEvent::SensorErrorEvent()
-    : Event(EventTypeNames::error, false, true)
-{
-}
-
 SensorErrorEvent::SensorErrorEvent(const AtomicString& eventType)
     : Event(eventType, true, false) // let default be bubbles but is not cancelable.
 {
 }
 
 SensorErrorEvent::SensorErrorEvent(const AtomicString& eventType, const SensorErrorEventInit& initializer)
     : Event(eventType, initializer)
 {
     setCanBubble(true);
 }
 
 const AtomicString& SensorErrorEvent::interfaceName() const
 {
     return EventNames::SensorErrorEvent;
 }
 
 DEFINE_TRACE(SensorErrorEvent)
 {
     Event::trace(visitor);
 }
 
 } // namespace blink