Honestly Barcelona has more tendency to win their remaining game due to their current shape in the squad. If there were many games to be played then i can say there is small chance for Madrid, this time the games left is no more than 7 games no hope again.
Barca is only 4 points ahead of Madrid, which makes predicting the winner more difficult. Although the Blancos have tough 8 matches to go through plus the champions league, the squad is better this time, and could repeat what happened with them last season; winning both laliga and champions league.
Barcelona and Real Madrid are both very strong teams, but in their last matches, both teams did not perform well, Real Madrid lost their last match 1-2 to Valencia, and Barcelona draw their last match by 1-1 goals with Real Betis, so currently Barcelona is 4 points ahead of Real Madrid in the points table. However, this gap of only 4 points can never be the final result, because there are still many matches left. In sports, nothing can be predicted for sure, so we can't say anything in this case either.