Make slots in non-shadow trees participate in a flat tree

third_party/WebKit/Source/core/css/resolver/ElementResolveContext.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 28 matching lines @@
       m_elementLinkState(NotInsideLink),
       m_distributedToInsertionPoint(false) {}
 
 ElementResolveContext::ElementResolveContext(Element& element)
     : m_element(&element),
       m_elementLinkState(
           element.document().visitedLinkState().determineLinkState(element)),
       m_distributedToInsertionPoint(false) {
   LayoutTreeBuilderTraversal::ParentDetails parentDetails;
   m_parentNode =
-      element.isSlotOrActiveInsertionPoint()
+      element.isActiveSlotOrActiveInsertionPoint()
           ? nullptr
           : LayoutTreeBuilderTraversal::parent(element, &parentDetails);
   m_distributedToInsertionPoint = parentDetails.insertionPoint();
 
   const Document& document = element.document();
   Node* documentElement = document.documentElement();
   const ComputedStyle* documentStyle = document.computedStyle();
   m_rootElementStyle = documentElement && element != documentElement
                            ? documentElement->computedStyle()
                            : documentStyle;
   if (!m_rootElementStyle)
     m_rootElementStyle = documentStyle;
 }
 
 }  // namespace blink