Set ComputedStyle on Node and use that in buildOwnLayout()

third_party/WebKit/Source/core/html/HTMLOptionElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Motorola Mobility, Inc.  All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 195 matching lines @@
 
 void HTMLOptionElement::parseAttribute(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& value)
 {
     if (name == valueAttr) {
         if (HTMLDataListElement* dataList = ownerDataListElement())
             dataList->optionElementChildrenChanged();
     } else if (name == disabledAttr) {
         if (oldValue.isNull() != value.isNull()) {
             pseudoStateChanged(CSSSelector::PseudoDisabled);
             pseudoStateChanged(CSSSelector::PseudoEnabled);
-            if (layoutObject())
+            if (hasLayoutObject())
                 LayoutTheme::theme().controlStateChanged(*layoutObject(), EnabledControlState);
         }
     } else if (name == selectedAttr) {
         if (oldValue.isNull() != value.isNull() && !m_isDirty)
             setSelected(!value.isNull());
         pseudoStateChanged(CSSSelector::PseudoDefault);
     } else if (name == labelAttr) {
         updateLabel();
     } else {
         HTMLElement::parseAttribute(name, oldValue, value);
@@ skipping 245 matching lines @@
         ASSERT(parent);
         if (isHTMLOptGroupElement(*parent)) {
             const ComputedStyle* parentStyle = parent->computedStyle() ? parent->computedStyle() : parent->ensureComputedStyle();
             return !parentStyle || parentStyle->display() == NONE;
         }
     }
     return m_style->display() == NONE;
 }
 
 } // namespace blink