I realise I might get downvoted here because of an unpopular point of view, but some of these comments raise a few flags: “I reported it up to where my manager knew, my director knew, the coworker’s manager knew and our HR representative knew. Nothing happened. I was warned that things will get very serious if continued,” So EVERYONE knew and they still disagreed with their point of view. Warned them that accusations…
In a company the size of google, managers aren't the people that should have an opinion on this matter. What that manager said, assuming this document is valid, is absolutely terrible. Heck, if some manager in my hypothetical company told someone that their report of sexual harassment is an "overreaction" that person wouldn't be manager for long.