It's a stupid theory.

Cocaine is taken from the sap inside the cocoa leaf. The white sap is then dryed into a powder, and then purified.

You wouldnt be able to cross cannabis with cocoa anyway, i dont think.

Also, it probably wouldnt give you any feeling, you'd just get high.

All in all, the cocaine part wouldnt do anything, apart from lowering the maximum THC levels.