The Department of Justice is considering asking Google (GOOG. O) to break up after a landmark antitrust victory, and people familiar with the matter said the most likely units to be spun off if the Justice Department moves forward are the Android operating system and Google's web browser Chrome. Officials are also considering a forced sale of AdWords, the company's platform for selling text ads, one of the people said. It is reported that Google's forced breakup would be the largest corporate breakup in the United States since AT & T was broken up in the 1980s.