Use invalidation sets for :read-only and :read-write.

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 154 matching lines @@
     } else if (name == disabledAttr) {
         bool oldDisabled = m_disabled;
         m_disabled = !value.isNull();
         if (oldDisabled != m_disabled)
             disabledAttributeChanged();
     } else if (name == readonlyAttr) {
         bool wasReadOnly = m_isReadOnly;
         m_isReadOnly = !value.isNull();
         if (wasReadOnly != m_isReadOnly) {
             setNeedsWillValidateCheck();
-            setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::fromAttribute(name));
+            pseudoStateChanged(CSSSelector::PseudoReadOnly);
+            pseudoStateChanged(CSSSelector::PseudoReadWrite);
             if (layoutObject())
                 LayoutTheme::theme().controlStateChanged(*layoutObject(), ReadOnlyControlState);
         }
     } else if (name == requiredAttr) {
         bool wasRequired = m_isRequired;
         m_isRequired = !value.isNull();
         if (wasRequired != m_isRequired)
             requiredAttributeChanged();
         UseCounter::count(document(), UseCounter::RequiredAttribute);
     } else if (name == autofocusAttr) {
@@ skipping 476 matching lines @@
         dispatchFormControlChangeEvent();
 }
 
 void HTMLFormControlElement::copyNonAttributePropertiesFromElement(const Element& source)
 {
     HTMLElement::copyNonAttributePropertiesFromElement(source);
     setNeedsValidityCheck();
 }
 
 } // namespace blink