Option, checkbox and radio should support ':default' selector

third_party/WebKit/Source/core/html/HTMLFormControlElement.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 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * 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 617 matching lines @@
         m_wasFocusedByMouse = false;
     HTMLElement::dispatchBlurEvent(newFocusedElement, type, sourceCapabilities);
     hideVisibleValidationMessage();
 }
 
 bool HTMLFormControlElement::isSuccessfulSubmitButton() const
 {
     return canBeSuccessfulSubmitButton() && !isDisabledFormControl();
 }
 
-bool HTMLFormControlElement::matchesDefaultPseudoClass() const
-{
-    // HTMLFormElement::findDefaultButton() traverses the tree. So we check
-    // canBeSuccessfulSubmitButton() first for early return.
-    return canBeSuccessfulSubmitButton() && form() && form()->findDefaultButton() == this;
-}
-
 HTMLFormControlElement* HTMLFormControlElement::enclosingFormControlElement(Node* node)
 {
     if (!node)
         return nullptr;
     return Traversal<HTMLFormControlElement>::firstAncestorOrSelf(*node);
 }
 
 String HTMLFormControlElement::nameForAutofill() const
 {
     String fullName = name();
@@ skipping 13 matching lines @@
         dispatchFormControlChangeEvent();
 }
 
 void HTMLFormControlElement::copyNonAttributePropertiesFromElement(const Element& source)
 {
     HTMLElement::copyNonAttributePropertiesFromElement(source);
     setNeedsValidityCheck();
 }
 
 } // namespace blink