Replace elementHasLegalLinkAttribute() helper with virtual function

Source/core/html/HTMLInputElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
@@ skipping 1188 matching lines @@
         return true;
 
     return HTMLTextFormControlElement::willRespondToMouseClickEvents();
 }
 
 bool HTMLInputElement::isURLAttribute(const Attribute& attribute) const
 {
     return attribute.name() == srcAttr || attribute.name() == formactionAttr || HTMLTextFormControlElement::isURLAttribute(attribute);
 }
 
+bool HTMLInputElement::hasLegalLinkAttribute(const QualifiedName& name) const
+{
+    return (isImageButton() && name == srcAttr) || HTMLTextFormControlElement::hasLegalLinkAttribute(name);

[tkent, 2014/03/18 01:23:31]

We don't want to add new input-type check code in HTMLInputElement. We should
introduce InputType::hasLegalLinkAttribute, and ImageInputType should override
it.

FIXME comment or another CL is acceptable for this.

[Inactive, 2014/03/18 02:10:22]

I added the InputType::hasLegalLinkAttribute() virtual function to this CL.
PTAL.

+}
+
 const AtomicString& HTMLInputElement::defaultValue() const
 {
     return fastGetAttribute(valueAttr);
 }
 
 void HTMLInputElement::setDefaultValue(const AtomicString& value)
 {
     setAttribute(valueAttr, value);
 }
 
@@ skipping 649 matching lines @@
 }
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
 PassRefPtr<RenderStyle> HTMLInputElement::customStyleForRenderer()
 {
     return m_inputTypeView->customStyleForRenderer(originalStyleForRenderer());
 }
 #endif
 
 } // namespace