LibJS: Add make_handle({Nonnull,}GCPtr<T>) overloads

Userland/Libraries/LibJS/AST.cpp

@@ -3778,7 +3778,7 @@ ThrowCompletionOr<Value> TaggedTemplateLiteral::get_template_object(Interpreter&
     MUST(template_->set_integrity_level(Object::IntegrityLevel::Frozen));
 
     // 15. Append the Record { [[Site]]: templateLiteral, [[Array]]: template } to templateRegistry.
-    m_cached_values.set(&realm, make_handle(template_.ptr()));
+    m_cached_values.set(&realm, make_handle(template_));
 
     // 16. Return template.
     return template_;

Userland/Libraries/LibJS/Heap/Handle.h

@@ -121,6 +121,20 @@ inline Handle<T> make_handle(T& cell)
     return Handle<T>::create(&cell);
 }
 
+template<class T>
+inline Handle<T> make_handle(GCPtr<T> cell)
+{
+    if (!cell)
+        return Handle<T> {};
+    return Handle<T>::create(cell.ptr());
+}
+
+template<class T>
+inline Handle<T> make_handle(NonnullGCPtr<T> cell)
+{
+    return Handle<T>::create(cell.ptr());
+}
+
 template<>
 class Handle<Value> {
 public:

Userland/Libraries/LibWeb/Fetch/FetchMethod.cpp

@@ -107,7 +107,7 @@ JS::NonnullGCPtr<JS::Promise> fetch_impl(JS::VM& vm, RequestInfo const& input, R
         // 4. Set responseObject to the result of creating a Response object, given response, "immutable", and
         //    relevantRealm.
         auto response_object = Response::create(relevant_realm, response, Headers::Guard::Immutable);
-        response_object_handle = JS::make_handle(response_object.ptr());
+        response_object_handle = JS::make_handle(response_object);
 
         // 5. Resolve p with responseObject.
         WebIDL::resolve_promise(vm, promise_capability, response_object);

Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.cpp

@@ -323,7 +323,7 @@ Vector<JS::Handle<DOM::Document>> EventLoop::documents_in_this_event_loop() cons
     Vector<JS::Handle<DOM::Document>> documents;
     for (auto& document : m_documents) {
         VERIFY(document);
-        documents.append(JS::make_handle(*document.ptr()));
+        documents.append(JS::make_handle(*document));
     }
     return documents;
 }

Userland/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp

@@ -1174,7 +1174,7 @@ Create:
     auto new_element = insert_html_element(HTMLToken::make_start_tag(entry->element->local_name()));
 
     // 9. Replace the entry for entry in the list with an entry for new element.
-    m_list_of_active_formatting_elements.entries().at(index).element = JS::make_handle(new_element.ptr());
+    m_list_of_active_formatting_elements.entries().at(index).element = JS::make_handle(new_element);
 
     // 10. If the entry for new element in the list of active formatting elements is not the last entry in the list, return to the step labeled advance.
     if (index != m_list_of_active_formatting_elements.entries().size() - 1)