Who did he harm?
Depends on how you look at it. He took up resources that could better be spent on solving or preventing other crimes.
Nope. Cop did that. Didn't have to chase him, could have stopped when he lost him.
And the consequences of a collision gets worse with increased velocity, so while nothing happened today, the police acted in the public interest to prevent that.
Nope. That's an increased risk of harming someone, and it was his decision to take that risk. Risk ≠ harm, though. So, fail on that, too.
Or you could argue that increased speed leads to more pollution which harms the environment and thus everybody.
Nope. Any increased pollution is a result of increased consumption of gas. The cost of the pollution that is caused by burning the gas is already factored into the cost of gas.
Either way he didn't follow the rules that were setup and got punished for it. Rightfully so.
Nope, still not harm. That's no different from jaywalking or letting your grass grow too tall.