Clinton - 56%
Sanders - 41%
O'Malley - 2%
Others - 1%
This is assuming that the race is still competitive. CA is not that great of a state for Bernie due to the large minority populations, which hurt him in the major population centers and the Central Valley. He'll do well in rural Northern CA, counties with large amounts of college kids, and some parts of the Bay Area.
By the time the election actually rolls around, I think that Bernie would be lucky to win a county.
O'Malley is out, but it wouldn't change that much.