Track reasons for |Node::SetNeedsStyleRecalc|

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 52 matching lines @@
     recalcSelectOptions();
     HTMLElement::childrenChanged(change);
 }
 
 void HTMLOptGroupElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     HTMLElement::parseAttribute(name, value);
     recalcSelectOptions();
 
     if (name == disabledAttr)
-        didAffectSelector(AffectedSelectorDisabled | AffectedSelectorEnabled);
+        didAffectSelector(StyleChangeReasonForTracing::fromAttribute(disabledAttr), AffectedSelectorDisabled | AffectedSelectorEnabled);
     else if (name == labelAttr)
         updateGroupLabel();
 }
 
 void HTMLOptGroupElement::recalcSelectOptions()
 {
     if (HTMLSelectElement* select = Traversal<HTMLSelectElement>::firstAncestor(*this))
         select->setRecalcListItems();
 }
 
@@ skipping 81 matching lines @@
     label.setTextContent(labelText);
     label.setAttribute(aria_labelAttr, AtomicString(labelText));
 }
 
 HTMLDivElement& HTMLOptGroupElement::optGroupLabelElement() const
 {
     return *toHTMLDivElement(userAgentShadowRoot()->getElementById(ShadowElementNames::optGroupLabel()));
 }
 
 } // namespace