Google's deal to buy Fitbit is under intense scrutiny on 2 continents – here are the privacy and antitrust hurdles it must clear to land an 'unprecedented' merger (GOOG, GOOGL, FIT)

· Last year, Google announced it would acquire wearables maker Fitbit in a $2.1 billion acquisition that has drawn attention from antitrust regulators.
· The deal is currently being probed by the Department of Justice, and will have to overcome several hurdles in order to be approved.
· Google says it will not use Fitbit...