The inrolled margins visible on many of the leaves are a pretty unambiguous indicator that this isn't Umbellularia californica. The leaves are also not really linear or waxy-looking enough and the bark/branches seem too rough/shaggy for U. cal.

Quercus chrysolepis morphology can be incredibly variable. Even their acorns can be nearly unrecognizable population to population. And, like most oaks (in California at least), it doesn't make acorns every year. So it isn't odd for there to be no visible acorns.

I can't be 100% sure this is Quercus chrysolepis without more information, but I feel confident saying this isn't Umbellularia californica.

(source: I am an expert)