Remove support for Document.createEvent() without argument

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 3838 matching lines @@
 PassRefPtrWillBeRawPtr<Event> Document::createEvent(const String& eventType, ExceptionState& exceptionState)
 {
     RefPtrWillBeRawPtr<Event> event = EventFactory::create(eventType);
     if (event)
         return event.release();
 
     exceptionState.throwDOMException(NotSupportedError, "The provided event type ('" + eventType + "') is invalid.");
     return nullptr;
 }
 
-PassRefPtrWillBeRawPtr<Event> Document::createEvent(ExceptionState& exceptionState)
-{
-    if (!isSVGDocument()) {
-        exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, 0));
-        return nullptr;
-    }
-
-    UseCounter::count(this, UseCounter::DocumentCreateEventOptionalArgument);
-    // Legacy SVGDocument behavior.
-    return createEvent("undefined", exceptionState);
-}
-
 void Document::addMutationEventListenerTypeIfEnabled(ListenerType listenerType)
 {
     if (ContextFeatures::mutationEventsEnabled(this))
         addListenerType(listenerType);
 }
 
 void Document::addListenerTypeIfNeeded(const AtomicString& eventType)
 {
     if (eventType == EventTypeNames::DOMSubtreeModified) {
         UseCounter::count(*this, UseCounter::DOMSubtreeModifiedEvent);
@@ skipping 1792 matching lines @@
     visitor->trace(m_mediaQueryMatcher);
     visitor->trace(m_visibilityObservers);
     visitor->registerWeakMembers<Document, &Document::clearWeakMembers>(this);
     Supplementable<Document>::trace(visitor);
     TreeScope::trace(visitor);
     ContainerNode::trace(visitor);
     ExecutionContext::trace(visitor);
 }
 
 } // namespace WebCore