SAN RAMON, Calif. – In Google's infancy, co-founders Larry Page and Sergey Brin reviled Microsoft as a technological bully that ruthlessly abused its dominance of the personal computer software market to choke off competition that could spawn better products.Their disdain for Microsoft spurred Google to adopt “Don't Be Evil" as a corporate motto that remained its moral compass during its transition from a free-wheeling startup to a publicly traded company suddenly accountable to shareholders.That pledge is now a distant memory as Google confronts an existential threat similar to what Microsoft once faced.Like Microsoft was 22 years ago, Google is in the crosshairs of a Justice Department lawsuit accusing it of wielding the immense power of.