HTML Imports: No more BlockingDocumentCreation.

Source/wtf/TreeNode.h

 /*
  * 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 117 matching lines @@
         child->m_parent = child->m_next = child->m_previous = 0;
 
         if (oldNext)
             oldNext->m_previous = oldPrevious;
         if (oldPrevious)
             oldPrevious->m_next = oldNext;
 
         return child;
     }
 
+    void takeChildrenFrom(NodeType* oldParent)
+    {
+        ASSERT(oldParent != this);
+        while (oldParent->hasChildren()) {
+            NodeType* child = oldParent->firstChild();
+            oldParent->removeChild(child);
+            this->appendChild(child);
+        }
+    }
+
 private:
     NodeType* m_next;
     NodeType* m_previous;
     NodeType* m_parent;
     NodeType* m_firstChild;
     NodeType* m_lastChild;
 };
 
 template<class T>
 inline typename TreeNode<T>::NodeType* traverseNext(const TreeNode<T>* current, const TreeNode<T>* stayWithin = 0)
@@ skipping 37 matching lines @@
     return next;
 }
 
 }
 
 using WTF::TreeNode;
 using WTF::traverseNext;
 using WTF::traverseNextPostOrder;
 
 #endif