the thick copper trace
Your picture is very poor quality but most likely it is the outline of a "screening can" that fits exactly over the "golden trace" and might have been envisaged as useful for reducing noise on some analogue components, maybe a radio receiver or sensitive analogue input.

As such it won't have an "exact name" but if you envisage the "can" fitting into the holes and being soldered down maybe you can think of a decent name.

Drawing it in the PCB is exactly the same procedure as drawing any component that doesn't have a standard library part.