Style invalidation support for :first/last/only-child.

third_party/WebKit/Source/core/dom/ContainerNode.h

 /*
  * 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, 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 36 matching lines @@
     ChildrenAffectedByFirstChildRules = 1 << 4,
     ChildrenAffectedByLastChildRules = 1 << 5,
     ChildrenAffectedByDirectAdjacentRules = 1 << 6,
     ChildrenAffectedByIndirectAdjacentRules = 1 << 7,
     ChildrenAffectedByForwardPositionalRules = 1 << 8,
     ChildrenAffectedByBackwardPositionalRules = 1 << 9,
     AffectedByFirstChildRules = 1 << 10,
     AffectedByLastChildRules = 1 << 11,
 
     NumberOfDynamicRestyleFlags = 12,
+
+    ChildrenAffectedByStructuralRules = ChildrenAffectedByFirstChildRules
+        | ChildrenAffectedByLastChildRules
+        | ChildrenAffectedByDirectAdjacentRules
+        | ChildrenAffectedByIndirectAdjacentRules
+        | ChildrenAffectedByForwardPositionalRules
+        | ChildrenAffectedByBackwardPositionalRules
 };
 
 enum SubtreeModificationAction {
     DispatchSubtreeModifiedEvent,
     OmitSubtreeModifiedEvent
 };
 
 // This constant controls how much buffer is initially allocated
 // for a Node Vector that is used to store child Nodes of a given Node.
 // FIXME: Optimize the value.
@@ skipping 84 matching lines @@
     void setAffectedByFirstChildRules() { setRestyleFlag(AffectedByFirstChildRules); }
 
     bool affectedByLastChildRules() const { return hasRestyleFlag(AffectedByLastChildRules); }
     void setAffectedByLastChildRules() { setRestyleFlag(AffectedByLastChildRules); }
 
     bool needsAdjacentStyleRecalc() const;
 
     // FIXME: These methods should all be renamed to something better than "check",
     // since it's not clear that they alter the style bits of siblings and children.
     enum SiblingCheckType { FinishedParsingChildren, SiblingElementInserted, SiblingElementRemoved };
-    void checkForSiblingStyleChanges(SiblingCheckType, Node* changedNode, Node* nodeBeforeChange, Node* nodeAfterChange);
+    void checkForSiblingStyleChanges(SiblingCheckType, Element* changedElement, Node* nodeBeforeChange, Node* nodeAfterChange);
     void recalcDescendantStyles(StyleRecalcChange);
 
     bool childrenSupportStyleSharing() const { return !hasRestyleFlags(); }
 
     // -----------------------------------------------------------------------------
     // Notification of document structure changes (see core/dom/Node.h for more notification methods)
 
     enum ChildrenChangeType { ElementInserted, NonElementInserted, ElementRemoved, NonElementRemoved, AllChildrenRemoved, TextChanged };
     enum ChildrenChangeSource { ChildrenChangeSourceAPI, ChildrenChangeSourceParser };
     struct ChildrenChange {
@@ skipping 166 matching lines @@
 inline void getChildNodes(ContainerNode& node, NodeVector& nodes)
 {
     DCHECK(!nodes.size());
     for (Node* child = node.firstChild(); child; child = child->nextSibling())
         nodes.append(child);
 }
 
 } // namespace blink
 
 #endif // ContainerNode_h