The great film star has gravitas. The great actor has a capacity for total self-surrender to a role. Rarely does a performer have both. Compare the lethal force Crowe personified in “L.A. Confidential” with his worn, bureaucratized but dogged police investigator in “American Gangster.” Raised in Australia, where experience is less suburbanized and media-filtered, Crowe has something more real to reach for in “3:10 to Yuma.” Don’t buy the bad-boy image. Inside, there’s a serious, gifted artist.