Remove obsolete document wrapper creation in named constructors

Source/bindings/templates/methods.cpp

 {##############################################################################}
 {% macro generate_method(method, world_suffix) %}
 {% filter conditional(method.conditional_string) %}
 static void {{method.name}}{{method.overload_index}}Method{{world_suffix}}(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     {# Local variables #}
     {% if method.has_exception_state %}
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "{{method.name}}", "{{interface_name}}", info.Holder(), info.GetIsolate());
     {% endif %}
     {# Overloaded methods have length checked during overload resolution #}
@@ skipping 522 matching lines @@
     if (!info.IsConstructCall()) {
         throwTypeError(ExceptionMessages::constructorNotCallableAsFunction("{{constructor.name}}"), isolate);
         return;
     }
 
     if (ConstructorMode::current(isolate) == ConstructorMode::WrapExistingObject) {
         v8SetReturnValue(info, info.Holder());
         return;
     }
 
-    Document* documentPtr = currentDOMWindow(isolate)->document();
-    ASSERT(documentPtr);
-    Document& document = *documentPtr;
-
-    // Make sure the document is added to the DOM Node map. Otherwise, the {{cpp_class}} instance
-    // may end up being the only node in the map and get garbage-collected prematurely.
-    toV8(documentPtr, info.Holder(), isolate);
+    Document& document = *toDocument(currentExecutionContext(isolate));
 
     {% if constructor.has_exception_state %}
     ExceptionState exceptionState(ExceptionState::ConstructionContext, "{{interface_name}}", info.Holder(), isolate);
     {% endif %}
     {% if 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;
     }
     {% endif %}
     {% if constructor.arguments %}
     {{generate_arguments(constructor) | indent}}
     {% endif %}
     {{constructor.cpp_type}} impl = {{constructor.cpp_value}};
     {% if is_constructor_raises_exception %}
     if (exceptionState.throwIfNeeded())
         return;
     {% endif %}
 
     {{generate_constructor_wrapper(constructor) | indent}}
 }
 {% endmacro %}