Avoid branching in createAttributeEventListener

Source/core/html/HTMLFrameElementBase.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann (hausmann@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 109 matching lines @@
         // FIXME: If we are already attached, this has no effect.
     } else if (name == scrollingAttr) {
         // Auto and yes both simply mean "allow scrolling." No means "don't allow scrolling."
         if (equalIgnoringCase(value, "auto") || equalIgnoringCase(value, "yes"))
             m_scrolling = ScrollbarAuto;
         else if (equalIgnoringCase(value, "no"))
             m_scrolling = ScrollbarAlwaysOff;
         // FIXME: If we are already attached, this has no effect.
     } else if (name == onbeforeunloadAttr) {
         // FIXME: should <frame> elements have beforeunload handlers?
-        setAttributeEventListener(EventTypeNames::beforeunload, createAttributeEventListener(this, name, value));
+        setAttributeEventListener(EventTypeNames::beforeunload, createAttributeEventListener(this, name, value, eventParameterName()));
     } else
         HTMLFrameOwnerElement::parseAttribute(name, value);
 }
 
 void HTMLFrameElementBase::setNameAndOpenURL()
 {
     m_frameName = getNameAttribute();
     openURL();
 }
 
@@ skipping 87 matching lines @@
 void HTMLFrameElementBase::defaultEventHandler(Event* event)
 {
     if (contentFrame() && contentFrame()->isRemoteFrameTemporary()) {
         contentFrame()->chromeClient().forwardInputEvent(contentFrame(), event);
         return;
     }
     HTMLFrameOwnerElement::defaultEventHandler(event);
 }
 
 } // namespace WebCore