Remove an experimental webkitInsertionParent API.

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/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 1267 matching lines @@
 
     if (parent->isShadowRoot())
         return toShadowRoot(parent)->host();
 
     if (!parent->isElementNode())
         return 0;
 
     return toElement(parent);
 }
 
-Node* Node::insertionParentForBinding() const
-{
-    Node* node = resolveReprojection(this);
-    while (node && node->containingShadowRoot() && node->containingShadowRoot()->type() == ShadowRoot::UserAgentShadowRoot)
-        node = resolveReprojection(node);
-    return node;
-}
-
 bool Node::needsShadowTreeWalkerSlow() const
 {
     return (isShadowRoot() || (isElementNode() && (isInsertionPoint() || isPseudoElement() || toElement(this)->hasPseudoElements() || toElement(this)->shadow())));
 }
 
 bool Node::isBlockFlowElement() const
 {
     return isElementNode() && renderer() && renderer()->isBlockFlow();
 }
 
@@ skipping 1468 matching lines @@
         node->showTreeForThis();
 }
 
 void showNodePath(const WebCore::Node* node)
 {
     if (node)
         node->showNodePathForThis();
 }
 
 #endif