[selectors4] Use common ancestor strategy for :focus-within

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
@@ skipping 120 matching lines @@
   void ParserTakeAllChildrenFrom(ContainerNode&);
 
   void RemoveChildren(
       SubtreeModificationAction = kDispatchSubtreeModifiedEvent);
 
   void CloneChildNodes(ContainerNode* clone);
 
   void AttachLayoutTree(const AttachContext& = AttachContext()) override;
   void DetachLayoutTree(const AttachContext& = AttachContext()) override;
   LayoutRect BoundingBox() const final;
-  void SetFocused(bool, WebFocusType) override;
+  void SetFocused(bool, WebFocusType, Node* common_ancestor = nullptr) override;
   void FocusStateChanged();
   void FocusWithinStateChanged();
   void SetActive(bool = true) override;
   void SetDragged(bool) override;
   void SetHovered(bool = true) override;
 
   bool ChildrenOrSiblingsAffectedByFocus() const {
     return HasRestyleFlag(kChildrenOrSiblingsAffectedByFocus);
   }
   void SetChildrenOrSiblingsAffectedByFocus() {
@@ skipping 332 matching lines @@
 
 inline void GetChildNodes(ContainerNode& node, NodeVector& nodes) {
   DCHECK(!nodes.size());
   for (Node* child = node.FirstChild(); child; child = child->nextSibling())
     nodes.push_back(child);
 }
 
 }  // namespace blink
 
 #endif  // ContainerNode_h