IDL: Partial revert of r178934

Source/bindings/templates/methods.cpp

Index: Source/bindings/templates/methods.cpp
diff --git a/Source/bindings/templates/methods.cpp b/Source/bindings/templates/methods.cpp
index 4e5eed4988e95acdb2d0073c444d2cdac3486994..5033ad4fd1b99449b4b992572f92ba912b8ac755 100644
--- a/Source/bindings/templates/methods.cpp
+++ b/Source/bindings/templates/methods.cpp
@@ -573,7 +573,7 @@ static void {{name}}(const v8::FunctionCallbackInfo<v8::Value>& info)
     {% endif %}
     {# Overloaded constructors have length checked during overload resolution #}
     {% if constructor.number_of_required_arguments and not constructor.overload_index %}
-    if (info.Length() < {{constructor.number_of_required_arguments}}) {
+    if (UNLIKELY(info.Length() < {{constructor.number_of_required_arguments}})) {
         {{throw_minimum_arity_type_error(constructor, constructor.number_of_required_arguments)}};
         return;
     }