Drop document.createEvent support for things still behind a flag

third_party/WebKit/Source/modules/sensor/SensorReadingEvent.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/SensorReadingEvent.h"
 
 namespace blink {
 
 SensorReadingEvent::~SensorReadingEvent()
 {
 }
 
-SensorReadingEvent::SensorReadingEvent()
-{
-}
-
 SensorReadingEvent::SensorReadingEvent(const AtomicString& eventType)
     : Event(eventType, true, false) // let default be bubbles but is not cancelable.
     , m_reading(SensorReading::create())
 {
 }
 
 SensorReadingEvent::SensorReadingEvent(const AtomicString& eventType, SensorReading& reading)
     : Event(eventType, true, false) // let default be bubbles but is not cancelable.
     , m_reading(reading)
 {
@@ skipping 11 matching lines @@
     return EventNames::SensorReadingEvent;
 }
 
 DEFINE_TRACE(SensorReadingEvent)
 {
     Event::trace(visitor);
     visitor->trace(m_reading);
 }
 
 } // namespace blink