LibJS: Convert ECMAScriptFunctionObject::create() to NonnullGCPtr

Author: https://github.com/linusg
Commit: 73efdb1cc4
Pull-request: https://github.com/SerenityOS/serenity/pull/16479
Reviewed-by: https://github.com/davidot ✅

Userland/Libraries/LibWeb/WebDriver/ExecuteScript.cpp

@@ -249,7 +249,7 @@ static JS::ThrowCompletionOr<JS::Value> execute_a_function_body(Web::Page& page,
     //    The result of parsing global scope above.
     // strict
     //    The result of parsing strict above.
-    auto* function = JS::ECMAScriptFunctionObject::create(realm, "", move(source_text), function_expression->body(), function_expression->parameters(), function_expression->function_length(), &global_scope, nullptr, function_expression->kind(), function_expression->is_strict_mode(), function_expression->might_need_arguments_object(), contains_direct_call_to_eval);
+    auto function = JS::ECMAScriptFunctionObject::create(realm, "", move(source_text), function_expression->body(), function_expression->parameters(), function_expression->function_length(), &global_scope, nullptr, function_expression->kind(), function_expression->is_strict_mode(), function_expression->might_need_arguments_object(), contains_direct_call_to_eval);
 
     // 9. Let completion be Function.[[Call]](window, parameters) with function as the this value.
     // NOTE: This is not entirely clear, but I don't think they mean actually passing `function` as