Replace elementHasLegalLinkAttribute() helper with virtual function

Source/web/DOMUtilitiesPrivate.cpp

-/*
- * Copyright (C) 2009 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
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- * in the documentation and/or other materials provided with the
- * distribution.
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- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "DOMUtilitiesPrivate.h"
-
-#include "HTMLNames.h"
-#include "core/dom/Element.h"
-#include "core/html/HTMLInputElement.h"
-
-using namespace WebCore;
-using namespace WebCore::HTMLNames;
-
-namespace blink {
-
-bool elementHasLegalLinkAttribute(const Element* element, const QualifiedName& attrName)
-{
-    if (attrName == srcAttr)
-        return element->hasTagName(imgTag) || element->hasTagName(scriptTag) || element->hasTagName(iframeTag) || element->hasTagName(frameTag) || (element->hasTagName(inputTag) && toHTMLInputElement(element)->isImageButton());
-    if (attrName == hrefAttr)
-        return element->hasTagName(linkTag) || element->hasTagName(aTag) || element->hasTagName(areaTag);
-    if (attrName == actionAttr)
-        return element->hasTagName(formTag);
-    if (attrName == backgroundAttr)
-        return element->hasTagName(bodyTag) || element->hasTagName(tableTag) || element->hasTagName(trTag) || element->hasTagName(tdTag);
-    if (attrName == citeAttr)
-        return element->hasTagName(blockquoteTag) || element->hasTagName(qTag) || element->hasTagName(delTag) || element->hasTagName(insTag);
-    if (attrName == classidAttr || attrName == dataAttr)
-        return element->hasTagName(objectTag);
-    if (attrName == codebaseAttr)
-        return element->hasTagName(objectTag) || element->hasTagName(appletTag);
-    return false;
-}
-
-} // namespace blink