Hey guys. I successfully removed the latest version of Chrome & Keystone Agent from my Mac running Mountain Lion 10.8.5.

The command for Keystone Agent was as follows.

sudo ~/Library/Google/GoogleSoftwareUpdate/GoogleSoftwareUpdate.bundle/Contents/Resources/ksinstall –nuke

It was fairly trivial to find the correct location in finder, and then tweak the command line accordingly.

Richie