Avoid branching in createAttributeEventListener

Source/core/html/HTMLElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2011 Motorola Mobility. 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 296 matching lines @@
 void HTMLElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     if (name == tabindexAttr)
         return Element::parseAttribute(name, value);
 
     if (name == dirAttr) {
         dirAttributeChanged(value);
     } else {
         const AtomicString& eventName = eventNameForAttributeName(name);
         if (!eventName.isNull())
-            setAttributeEventListener(eventName, createAttributeEventListener(this, name, value));
+            setAttributeEventListener(eventName, createAttributeEventListener(this, name, value, eventParameterName()));
     }
 }
 
 PassRefPtrWillBeRawPtr<DocumentFragment> HTMLElement::textToFragment(const String& text, ExceptionState& exceptionState)
 {
     RefPtrWillBeRawPtr<DocumentFragment> fragment = DocumentFragment::create(document());
     unsigned i, length = text.length();
     UChar c = 0;
     for (unsigned start = 0; start < length; ) {
 
@@ skipping 615 matching lines @@
     // even in spatial navigation mode instead of handling it as a "click" action.
     if (isTextFormControl() || isContentEditable())
         return;
     int charCode = event->charCode();
     if (charCode == '\r' || charCode == ' ') {
         dispatchSimulatedClick(event);
         event->setDefaultHandled();
     }
 }
 
+const AtomicString& HTMLElement::eventParameterName()
+{
+    DEFINE_STATIC_LOCAL(const AtomicString, eventString, ("event", AtomicString::ConstructFromLiteral));
+    return eventString;
+}
+
 } // namespace WebCore
 
 #ifndef NDEBUG
 
 // For use in the debugger
 void dumpInnerHTML(WebCore::HTMLElement*);
 
 void dumpInnerHTML(WebCore::HTMLElement* element)
 {
     printf("%s\n", element->innerHTML().ascii().data());
 }
 #endif