Recalc sibling styles for forward positional rules on mutations only.

Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013 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
@@ skipping 316 matching lines @@
     // Methods for indicating the style is affected by dynamic updates (e.g., children changing, our position changing in our sibling list, etc.)
     bool styleAffectedByEmpty() const { return hasRareData() && rareDataStyleAffectedByEmpty(); }
     bool childrenAffectedByFocus() const { return hasRareData() && rareDataChildrenAffectedByFocus(); }
     bool childrenAffectedByHover() const { return hasRareData() && rareDataChildrenAffectedByHover(); }
     bool childrenAffectedByActive() const { return hasRareData() && rareDataChildrenAffectedByActive(); }
     bool childrenAffectedByDrag() const { return hasRareData() && rareDataChildrenAffectedByDrag(); }
     bool childrenAffectedByPositionalRules() const { return hasRareData() && (rareDataChildrenAffectedByForwardPositionalRules() || rareDataChildrenAffectedByBackwardPositionalRules()); }
     bool childrenAffectedByFirstChildRules() const { return hasRareData() && rareDataChildrenAffectedByFirstChildRules(); }
     bool childrenAffectedByLastChildRules() const { return hasRareData() && rareDataChildrenAffectedByLastChildRules(); }
     bool childrenAffectedByDirectAdjacentRules() const { return hasRareData() && rareDataChildrenAffectedByDirectAdjacentRules(); }
+    bool childrenAffectedByIndirectAdjacentRules() const { return hasRareData() && rareDataChildrenAffectedByIndirectAdjacentRules(); }
     bool childrenAffectedByForwardPositionalRules() const { return hasRareData() && rareDataChildrenAffectedByForwardPositionalRules(); }
     bool childrenAffectedByBackwardPositionalRules() const { return hasRareData() && rareDataChildrenAffectedByBackwardPositionalRules(); }
     unsigned childIndex() const { return hasRareData() ? rareDataChildIndex() : 0; }
 
     bool childrenSupportStyleSharing() const;
 
     void setStyleAffectedByEmpty();
     void setChildrenAffectedByFocus();
     void setChildrenAffectedByHover();
     void setChildrenAffectedByActive();
     void setChildrenAffectedByDrag();
     void setChildrenAffectedByFirstChildRules();
     void setChildrenAffectedByLastChildRules();
     void setChildrenAffectedByDirectAdjacentRules();
+    void setChildrenAffectedByIndirectAdjacentRules();
     void setChildrenAffectedByForwardPositionalRules();
     void setChildrenAffectedByBackwardPositionalRules();
     void setChildIndex(unsigned);
 
     void setIsInCanvasSubtree(bool);
     bool isInCanvasSubtree() const;
 
     bool isUpgradedCustomElement() { return customElementState() == Upgraded; }
     bool isUnresolvedCustomElement() { return customElementState() == WaitingForUpgrade; }
 
@@ skipping 275 matching lines @@
 
     QualifiedName m_tagName;
     bool rareDataStyleAffectedByEmpty() const;
     bool rareDataChildrenAffectedByFocus() const;
     bool rareDataChildrenAffectedByHover() const;
     bool rareDataChildrenAffectedByActive() const;
     bool rareDataChildrenAffectedByDrag() const;
     bool rareDataChildrenAffectedByFirstChildRules() const;
     bool rareDataChildrenAffectedByLastChildRules() const;
     bool rareDataChildrenAffectedByDirectAdjacentRules() const;
+    bool rareDataChildrenAffectedByIndirectAdjacentRules() const;
     bool rareDataChildrenAffectedByForwardPositionalRules() const;
     bool rareDataChildrenAffectedByBackwardPositionalRules() const;
     unsigned rareDataChildIndex() const;
 
     SpellcheckAttributeState spellcheckAttributeState() const;
 
     void updateNamedItemRegistration(const AtomicString& oldName, const AtomicString& newName);
     void updateExtraNamedItemRegistration(const AtomicString& oldName, const AtomicString& newName);
 
     void createUniqueElementData();
@@ skipping 236 matching lines @@
     template <> inline bool isElementOfType<const thisType>(const Element& element) { return element.predicate; } \
     DEFINE_NODE_TYPE_CASTS(thisType, predicate)
 
 #define DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(thisType) \
     template <> inline bool isElementOfType<const thisType>(const Element& element) { return is##thisType(element); } \
     DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION(thisType)
 
 } // namespace
 
 #endif