Although the US embassy website states that anyone who's ever been arrested is ineligible to use the Visa Waiver Program, the form you complete on the plane doesn't ask about arrests. It only asks whether you've ever been convicted for a crime of 'moral turpitude'. You can truthfully answer 'No' to that question.
While US immigration authorities would, no doubt, like to have direct access to the police & court records of other countries, they've always been denied them by every country except Canada (which shares a database with the USA). Obviously, many countries pass on specific information about people who're suspected of cross-border crime (such as terrorism or drug-smuggling) but, unless MI6 have prepared a dossier on you, you can be confident that the US authorities will not know about your 'dark history' ;-)
Chris