Support the essential part of Shadow DOM v1

third_party/WebKit/Source/core/dom/shadow/DistributedNodes.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 22 matching lines @@
 
 void DistributedNodes::swap(DistributedNodes& other)
 {
     m_nodes.swap(other.m_nodes);
     m_indices.swap(other.m_indices);
 }
 
 void DistributedNodes::append(PassRefPtrWillBeRawPtr<Node> node)
 {
     ASSERT(node);
-    ASSERT(!isActiveInsertionPoint(*node));
+    ASSERT(!node->isSlotOrActiveInsertionPoint());
     size_t size = m_nodes.size();
     m_indices.set(node.get(), size);
     m_nodes.append(node);
 }
 
 size_t DistributedNodes::find(const Node* node) const
 {
     WillBeHeapHashMap<RawPtrWillBeMember<const Node>, size_t>::const_iterator it = m_indices.find(node);
     if (it == m_indices.end())
         return kNotFound;
@@ skipping 19 matching lines @@
 
 DEFINE_TRACE(DistributedNodes)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_nodes);
     visitor->trace(m_indices);
 #endif
 }
 
 } // namespace blink