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

third_party/WebKit/Source/core/dom/Node.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) 2004-2011, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 488 matching lines @@
 
   void UpdateDistribution();
 
   void SetIsLink(bool f);
 
   bool HasEventTargetData() const { return GetFlag(kHasEventTargetDataFlag); }
   void SetHasEventTargetData(bool flag) {
     SetFlag(flag, kHasEventTargetDataFlag);
   }
 
-  virtual void SetFocused(bool flag, WebFocusType);
+  virtual void SetFocused(bool flag,
+                          WebFocusType,
+                          Node* common_ancestor = nullptr);
   virtual void SetHasFocusWithin(bool flag);
   virtual void SetActive(bool flag = true);
   virtual void SetDragged(bool flag);
   virtual void SetHovered(bool flag = true);
 
   virtual int tabIndex() const;
 
   virtual Node* FocusDelegate();
   // This is called only when the node is focused.
   virtual bool ShouldHaveFocusAppearance() const;
@@ skipping 500 matching lines @@
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showNode(const blink::Node*);
 void showTree(const blink::Node*);
 void showNodePath(const blink::Node*);
 #endif
 
 #endif  // Node_h