CSS: RuleFeature::clear clears all invalidation sets

third_party/WebKit/Source/core/css/RuleFeature.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 724 matching lines @@
 
 void RuleFeatureSet::clear()
 {
     siblingRules.clear();
     uncommonAttributeRules.clear();
     m_metadata.clear();
     m_classInvalidationSets.clear();
     m_attributeInvalidationSets.clear();
     m_idInvalidationSets.clear();
     m_pseudoInvalidationSets.clear();
+    m_universalSiblingInvalidationSet.clear();
+    m_nthInvalidationSet.clear();
 }
 
 void RuleFeatureSet::collectInvalidationSetsForClass(InvalidationLists& invalidationLists, Element& element, const AtomicString& className) const
 {
     InvalidationSetMap::const_iterator it = m_classInvalidationSets.find(className);
     if (it == m_classInvalidationSets.end())
         return;
 
     DescendantInvalidationSet* descendants;
     SiblingInvalidationSet* siblings;
@@ skipping 165 matching lines @@
         addFeaturesToInvalidationSet(universalSet.ensureSiblingDescendants(), descendantFeatures);
 }
 
 DEFINE_TRACE(RuleFeatureSet)
 {
     visitor->trace(siblingRules);
     visitor->trace(uncommonAttributeRules);
 }
 
 } // namespace blink