Remove unnecessary code from HTMLOptGroupElement.

third_party/WebKit/Source/core/html/HTMLOptGroupElement.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, 2010 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 39 matching lines @@
     HTMLOptGroupElement* optGroupElement = new HTMLOptGroupElement(document);
     optGroupElement->ensureUserAgentShadowRoot();
     return optGroupElement;
 }
 
 bool HTMLOptGroupElement::isDisabledFormControl() const
 {
     return fastHasAttribute(disabledAttr);
 }
 
-void HTMLOptGroupElement::childrenChanged(const ChildrenChange& change)
-{
-    recalcSelectOptions();
-    HTMLElement::childrenChanged(change);
-}
-
 void HTMLOptGroupElement::parseAttribute(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& value)
 {
     HTMLElement::parseAttribute(name, oldValue, value);
-    recalcSelectOptions();
 
     if (name == disabledAttr) {
         pseudoStateChanged(CSSSelector::PseudoDisabled);
         pseudoStateChanged(CSSSelector::PseudoEnabled);
     } else if (name == labelAttr) {
         updateGroupLabel();
     }
 }
 
-void HTMLOptGroupElement::recalcSelectOptions()
-{
-    // TODO(tkent): Should use ownerSelectElement().
-    if (HTMLSelectElement* select = Traversal<HTMLSelectElement>::firstAncestor(*this))
-        select->setRecalcListItems();
-}
-
 void HTMLOptGroupElement::attach(const AttachContext& context)
 {
     if (context.resolvedStyle) {
         ASSERT(!m_style || m_style == context.resolvedStyle);
         m_style = context.resolvedStyle;
     }
     HTMLElement::attach(context);
 }
 
 void HTMLOptGroupElement::detach(const AttachContext& context)
@@ skipping 92 matching lines @@
     label.setTextContent(labelText);
     label.setAttribute(aria_labelAttr, AtomicString(labelText));
 }
 
 HTMLDivElement& HTMLOptGroupElement::optGroupLabelElement() const
 {
     return *toHTMLDivElement(userAgentShadowRoot()->getElementById(ShadowElementNames::optGroupLabel()));
 }
 
 } // namespace blink