LibWeb: Add String variants of functions in ChildNode

This is required in porting over CharacterData from DeprecatedString to
String.

Unfortunately, as with ParentNode, we cannot yet remove the
DeprecatedString variants of these functions as the Element interface
includes ChildNode and has not yet been ported over from
DeprecatedString.

Userland/Libraries/LibWeb/DOM/ChildNode.h

@@ -16,7 +16,7 @@ template<typename NodeType>
 class ChildNode {
 public:
     // https://dom.spec.whatwg.org/#dom-childnode-before
-    WebIDL::ExceptionOr<void> before(Vector<Variant<JS::Handle<Node>, DeprecatedString>> const& nodes)
+    WebIDL::ExceptionOr<void> before(Vector<Variant<JS::Handle<Node>, String>> const& nodes)
     {
         auto* node = static_cast<NodeType*>(this);
 
@@ -31,7 +31,7 @@ public:
         auto viable_previous_sibling = viable_previous_sibling_for_insertion(nodes);
 
         // 4. Let node be the result of converting nodes into a node, given nodes and this’s node document.
-        auto node_to_insert = TRY(convert_nodes_to_single_node(from_deprecated_nodes(nodes), node->document()));
+        auto node_to_insert = TRY(convert_nodes_to_single_node(nodes, node->document()));
 
         // 5. If viablePreviousSibling is null, then set it to parent’s first child; otherwise to viablePreviousSibling’s next sibling.
         if (!viable_previous_sibling)
@@ -46,7 +46,7 @@ public:
     }
 
     // https://dom.spec.whatwg.org/#dom-childnode-after
-    WebIDL::ExceptionOr<void> after(Vector<Variant<JS::Handle<Node>, DeprecatedString>> const& nodes)
+    WebIDL::ExceptionOr<void> after(Vector<Variant<JS::Handle<Node>, String>> const& nodes)
     {
         auto* node = static_cast<NodeType*>(this);
 
@@ -61,7 +61,7 @@ public:
         auto viable_next_sibling = viable_nest_sibling_for_insertion(nodes);
 
         // 4. Let node be the result of converting nodes into a node, given nodes and this’s node document.
-        auto node_to_insert = TRY(convert_nodes_to_single_node(from_deprecated_nodes(nodes), node->document()));
+        auto node_to_insert = TRY(convert_nodes_to_single_node(nodes, node->document()));
 
         // 5. Pre-insert node into parent before viableNextSibling.
         (void)TRY(parent->pre_insert(node_to_insert, viable_next_sibling));
@@ -70,7 +70,7 @@ public:
     }
 
     // https://dom.spec.whatwg.org/#dom-childnode-replacewith
-    WebIDL::ExceptionOr<void> replace_with(Vector<Variant<JS::Handle<Node>, DeprecatedString>> const& nodes)
+    WebIDL::ExceptionOr<void> replace_with(Vector<Variant<JS::Handle<Node>, String>> const& nodes)
     {
         auto* node = static_cast<NodeType*>(this);
 
@@ -85,7 +85,7 @@ public:
         auto viable_next_sibling = viable_nest_sibling_for_insertion(nodes);
 
         // 4. Let node be the result of converting nodes into a node, given nodes and this’s node document.
-        auto node_to_insert = TRY(convert_nodes_to_single_node(from_deprecated_nodes(nodes), node->document()));
+        auto node_to_insert = TRY(convert_nodes_to_single_node(nodes, node->document()));
 
         // 5. If this’s parent is parent, replace this with node within parent.
         // Note: This could have been inserted into node.
@@ -113,11 +113,26 @@ public:
         node->remove();
     }
 
+    WebIDL::ExceptionOr<void> before(Vector<Variant<JS::Handle<Node>, DeprecatedString>> const& nodes)
+    {
+        return before(from_deprecated_nodes(nodes));
+    }
+
+    WebIDL::ExceptionOr<void> after(Vector<Variant<JS::Handle<Node>, DeprecatedString>> const& nodes)
+    {
+        return after(from_deprecated_nodes(nodes));
+    }
+
+    WebIDL::ExceptionOr<void> replace_with(Vector<Variant<JS::Handle<Node>, DeprecatedString>> const& nodes)
+    {
+        return replace_with(from_deprecated_nodes(nodes));
+    }
+
 protected:
     ChildNode() = default;
 
 private:
-    JS::GCPtr<Node> viable_previous_sibling_for_insertion(Vector<Variant<JS::Handle<Node>, DeprecatedString>> const& nodes)
+    JS::GCPtr<Node> viable_previous_sibling_for_insertion(Vector<Variant<JS::Handle<Node>, String>> const& nodes)
     {
         auto* node = static_cast<NodeType*>(this);
 
@@ -142,7 +157,7 @@ private:
         return nullptr;
     }
 
-    JS::GCPtr<Node> viable_nest_sibling_for_insertion(Vector<Variant<JS::Handle<Node>, DeprecatedString>> const& nodes)
+    JS::GCPtr<Node> viable_nest_sibling_for_insertion(Vector<Variant<JS::Handle<Node>, String>> const& nodes)
     {
         auto* node = static_cast<NodeType*>(this);