Nah, Davis doesn't have that kind of mind. He is so arrogant (and so sure the vote fraud fix is in) that he can't even imagine himself losing, no matter what policies he supports. So he endorses this to keep the Left from defecting to the Green Party.
There's more to it than that... Even lifelong Repellicans who are swayed with the dream of stopping all growth and not only preserving everything but also restoring everything to 1925 population levels and conditions in CA will support him on GANG-GREEN type moves like this one.
Native Californians also will never stop "California Dreamin!" Some of the most otherwise conservative people suck into this crap everytime it's tried here! It's retro-thinking to the maximum, but it's out there, just beneath the surface.
He's going after the Green votes.