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 63b3599828d035b1541d653dbf0829ba1841540f..170ff919b8b3bf2ac9be9365c4af08678fa580d2 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"
@@ -206,6 +207,11 @@ 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;