Skip scheduling sibling invalidation based on direct adjacent count.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 80 matching lines @@
     }
 
     bool hasSelectorForId(const AtomicString& idValue) const { return m_idInvalidationSets.contains(idValue); }
 
     // Collect descendant and sibling invalidation sets.
     void collectInvalidationSetsForClass(InvalidationLists&, Element&, const AtomicString& className) const;
     void collectInvalidationSetsForId(InvalidationLists&, Element&, const AtomicString& id) const;
     void collectInvalidationSetsForAttribute(InvalidationLists&, Element&, const QualifiedName& attributeName) const;
     void collectInvalidationSetsForPseudoClass(InvalidationLists&, Element&, CSSSelector::PseudoType) const;
 
-    void collectSiblingInvalidationSetForClass(InvalidationLists&, Element&, const AtomicString& className) const;
-    void collectSiblingInvalidationSetForId(InvalidationLists&, Element&, const AtomicString& id) const;
-    void collectSiblingInvalidationSetForAttribute(InvalidationLists&, Element&, const QualifiedName& attributeName) const;
-    void collectUniversalSiblingInvalidationSet(InvalidationLists&) const;
+    void collectSiblingInvalidationSetForClass(InvalidationLists&, Element&, const AtomicString& className, unsigned minDirectAdjacent) const;
+    void collectSiblingInvalidationSetForId(InvalidationLists&, Element&, const AtomicString& id, unsigned minDirectAdjacent) const;
+    void collectSiblingInvalidationSetForAttribute(InvalidationLists&, Element&, const QualifiedName& attributeName, unsigned minDirectAdjacent) const;
+    void collectUniversalSiblingInvalidationSet(InvalidationLists&, unsigned minDirectAdjacent) const;
 
     bool hasIdsInSelectors() const
     {
         return m_idInvalidationSets.size() > 0;
     }
 
     DECLARE_TRACE();
 
     HeapVector<RuleFeature> siblingRules;
     HeapVector<RuleFeature> uncommonAttributeRules;
@@ skipping 67 matching lines @@
     InvalidationSetMap m_idInvalidationSets;
     PseudoTypeInvalidationSetMap m_pseudoInvalidationSets;
     RefPtr<SiblingInvalidationSet> m_universalSiblingInvalidationSet;
 
     friend class RuleFeatureSetTest;
 };
 
 } // namespace blink
 
 #endif // RuleFeature_h