A judge ruled in August that Google maintains an illegal monopoly in the search and advertising markets.Google; Getty Images; Chelsea Jia Feng/BIThe DOJ asked the judge in its antitrust case against Google to force the company to sell Chrome.Chrome is a key distribution method for Search, which provides crucial data for Google's ads.A breakup would be a blow to Google and likely create opportunities for competitors.A possible breakup of Google just became slightly more likely.The Justice Department on Wednesday asked the judge in its antitrust case against Google to force the company to sell its Chrome browser.That follows Judge Mehta's ruling in August that Google maintains an illegal monopoly in search and advertising markets.