Implement DOM: prepend, append, before, after & replaceWith

Source/core/dom/ChildNode.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ChildNode_h
 #define ChildNode_h
 
 #include "core/dom/Node.h"
 
 namespace blink {
 
 class ChildNode {
 public:
+    static void before(Node& node, const HeapVector<NodeOrString>& nodes, ExceptionState& exceptionState)
+    {
+        return node.before(nodes, exceptionState);
+    }
+
+    static void after(Node& node, const HeapVector<NodeOrString>& nodes, ExceptionState& exceptionState)
+    {
+        return node.after(nodes, exceptionState);
+    }
+
+    static void replaceWith(Node& node, const HeapVector<NodeOrString>& nodes, ExceptionState& exceptionState)
+    {
+        return node.replaceWith(nodes, exceptionState);
+    }
+
     static void remove(Node& node, ExceptionState& exceptionState)
     {
         return node.remove(exceptionState);
     }
 };
 
 } // namespace blink
 
 #endif // ChildNode_h