Warner Bros. Tops 2009 Box Office. Thanks To A Boy Named Harry Harry Potter's broom was turbo-charged this year, as the schoolboy wizard's latest film adventure helped Warner Bros. fly well north of $2 billion to repeat atop the annual domestic boxoffice rankings. Warners projects a $2.99 billion domestic tally and nearly 20% market share through Dec. 31. But as certain as the picture is at the pinnacle of year-end rankings, other top positions remain cloaked in uncertainty. Headed into the final frame, Paramount sits second with $1.44 billion and a 14% share, while Sony is third with $143 billion and a similar share. But Fox, with $1.25 billion (12%), has holiday tentpoles "Avatar" and "Alvin and the Chipmunks: The Squeakquel" still going strong enough to give the it a real shot at one of the medal positions. Warners -- also ringing up lots of loot with recently released "Sherlock Homles" -- used the heftiest slate in Hollywood to nail down its re...