Use invalidation sets for :invalid/:valid/:required/:optional.

Source/core/html/HTMLFormElement.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, 2009 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 707 matching lines @@
         HTMLFormControlElement* control = toHTMLFormControlElement(elements[i]);
         if (control->isSuccessfulSubmitButton())
             return control;
     }
 
     return 0;
 }
 
 void HTMLFormElement::setNeedsValidityCheck()
 {
     // For now unconditionally order style recalculation, which triggers

[dglazkov, 2014/10/24 17:13:25]

Is this comment still valid?

[rune, 2014/10/24 20:12:26]

Yes. With this CL we still recalculate style without checking validity first. We
just do it for fewer elements.

     // validity recalculation. In the near future, implement validity cache and
     // recalculate style only if it changed.
-    setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::createWithExtraData(StyleChangeReason::PseudoClass, StyleChangeExtraData::Invalid));
+    pseudoStateChanged(CSSSelector::PseudoValid);
+    pseudoStateChanged(CSSSelector::PseudoInvalid);
 }
 
 bool HTMLFormElement::checkValidity()
 {
     return !checkInvalidControlsAndCollectUnhandled(0);
 }
 
 bool HTMLFormElement::checkInvalidControlsAndCollectUnhandled(WillBeHeapVector<RefPtrWillBeMember<FormAssociatedElement> >* unhandledInvalidControls)
 {
     RefPtrWillBeRawPtr<HTMLFormElement> protector(this);
@@ skipping 117 matching lines @@
 }
 
 void HTMLFormElement::setDemoted(bool demoted)
 {
     if (demoted)
         UseCounter::count(document(), UseCounter::DemotedFormElement);
     m_wasDemoted = demoted;
 }
 
 } // namespace