This chart shows how Fox buying Roku could create a free TV giant

Fox CEO Lachlan Murdoch is making a major acquisition that will boost his company's streaming presence.Bloomberg/Getty ImagesFox is pushing further into free, ad-supported streaming by buying Roku.The combined company will own The Roku Channel and Tubi, two of the biggest free streamers.Fox has pursued an unorthodox strategy in the streaming wars.Fox mostly sat out the streaming wars, but is making a huge move by acquiring Roku.Buying Roku would make Fox the third-largest TV distributor in the U