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

Source/core/dom/Node.h

Index: Source/core/dom/Node.h
diff --git a/Source/core/dom/Node.h b/Source/core/dom/Node.h
index a4cb3d09bcbd6fd56c308e2a01bae555e3d9cc6b..fe29a7d48957baa4ed65f0088aa54c83938e8817 100644
--- a/Source/core/dom/Node.h
+++ b/Source/core/dom/Node.h
@@ -26,6 +26,7 @@
 #define Node_h
 
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
+#include "bindings/core/v8/UnionTypesCore.h"
 #include "core/CoreExport.h"
 #include "core/dom/MutationObserver.h"
 #include "core/dom/SimulatedClickOptions.h"
@@ -209,6 +210,11 @@ public:
     Node* firstChild() const;
     Node* lastChild() const;
 
+    void prepend(const HeapVector<NodeOrString>&, ExceptionState&);
+    void append(const HeapVector<NodeOrString>&, ExceptionState&);
+    void before(const HeapVector<NodeOrString>&, ExceptionState&);
+    void after(const HeapVector<NodeOrString>&, ExceptionState&);
+    void replaceWith(const HeapVector<NodeOrString>&, ExceptionState&);
     void remove(ExceptionState&);
 
     Node* pseudoAwareNextSibling() const;