Avoid branching in createAttributeEventListener

Source/core/html/HTMLFormElement.cpp

Index: Source/core/html/HTMLFormElement.cpp
diff --git a/Source/core/html/HTMLFormElement.cpp b/Source/core/html/HTMLFormElement.cpp
index 566e8c19e40f2aa73d99201f720d2b2f8ff7090b..e0b6cb2393155116f9d5c3cb7d802c930cbeb73f 100644
--- a/Source/core/html/HTMLFormElement.cpp
+++ b/Source/core/html/HTMLFormElement.cpp
@@ -487,9 +487,9 @@ void HTMLFormElement::parseAttribute(const QualifiedName& name, const AtomicStri
     else if (name == accept_charsetAttr)
         m_attributes.setAcceptCharset(value);
     else if (name == onautocompleteAttr)
-        setAttributeEventListener(EventTypeNames::autocomplete, createAttributeEventListener(this, name, value));
+        setAttributeEventListener(EventTypeNames::autocomplete, createAttributeEventListener(this, name, value, eventParameterName()));
     else if (name == onautocompleteerrorAttr)
-        setAttributeEventListener(EventTypeNames::autocompleteerror, createAttributeEventListener(this, name, value));
+        setAttributeEventListener(EventTypeNames::autocompleteerror, createAttributeEventListener(this, name, value, eventParameterName()));
     else
         HTMLElement::parseAttribute(name, value);
 }