Nothing. There's nothing there to indicate that he even knows who Oliver is. He was sure he'd get some kind of reaction, considering the interactions he'd witnessed first hand.

Barry's own eyes harden slightly at the man's return threat. He's not wrong and though Barry wouldn't turn his worst enemy over to the computer, he doesn't appreciate his bluff being blown so easily.

"Do you really want to play this game without knowing the rules?" He pauses at some stairs. "I'm trying to help you." Stay out of trouble, at least.