[selectors4] Implement :focus-within pseudo-class

third_party/WebKit/Source/core/dom/Node.cpp

 /*
  * 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, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  *
@@ skipping 2333 matching lines @@
     if (root->GetType() == ShadowRootType::kOpen)
       return root->AssignedSlotFor(*this);
   }
   return nullptr;
 }
 
 void Node::SetFocused(bool flag) {
   GetDocument().UserActionElements().SetFocused(this, flag);
 }
 
+void Node::SetHasFocusWithin(bool flag) {
+  GetDocument().UserActionElements().SetHasFocusWithin(this, flag);
+}
+
 void Node::SetActive(bool flag) {
   GetDocument().UserActionElements().SetActive(this, flag);
 }
 
 void Node::SetDragged(bool flag) {
   GetDocument().UserActionElements().SetDragged(this, flag);
 }
 
 void Node::SetHovered(bool flag) {
   GetDocument().UserActionElements().SetHovered(this, flag);
@@ skipping 17 matching lines @@
 bool Node::IsUserActionElementHovered() const {
   DCHECK(IsUserActionElement());
   return GetDocument().UserActionElements().IsHovered(this);
 }
 
 bool Node::IsUserActionElementFocused() const {
   DCHECK(IsUserActionElement());
   return GetDocument().UserActionElements().IsFocused(this);
 }
 
+bool Node::IsUserActionElementHasFocusWithin() const {
+  DCHECK(IsUserActionElement());
+  return GetDocument().UserActionElements().HasFocusWithin(this);
+}
+
 void Node::SetCustomElementState(CustomElementState new_state) {
   CustomElementState old_state = GetCustomElementState();
 
   switch (new_state) {
     case CustomElementState::kUncustomized:
       NOTREACHED();  // Everything starts in this state
       return;
 
     case CustomElementState::kUndefined:
       DCHECK_EQ(CustomElementState::kUncustomized, old_state);
@@ skipping 130 matching lines @@
   if (node) {
     std::stringstream stream;
     node->PrintNodePathTo(stream);
     LOG(INFO) << stream.str();
   } else {
     LOG(INFO) << "Cannot showNodePath for <null>";
   }
 }
 
 #endif