Have InputType factories take an HTMLInputElement reference in parameter

Source/core/html/forms/ButtonInputType.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #include "config.h"
 #include "core/html/forms/ButtonInputType.h"
 
 #include "core/html/forms/InputTypeNames.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
 
-PassRefPtr<InputType> ButtonInputType::create(HTMLInputElement* element)
+PassRefPtr<InputType> ButtonInputType::create(HTMLInputElement& element)
 {
     return adoptRef(new ButtonInputType(element));
 }
 
 const AtomicString& ButtonInputType::formControlType() const
 {
     return InputTypeNames::button();
 }
 
 bool ButtonInputType::supportsValidation() const
 {
     return false;
 }
 
 bool ButtonInputType::isTextButton() const
 {
     return true;
 }
 
 } // namespace WebCore