Google Chrome empty Finder window
Here is the way I removed this automatic upgrade which never explained me
what was going on.

The best information I found about this automatic update, and its removal is here:
how to remove Google’s secret update software from your mac.

Check the presence of GoogleSoftwareUpdate

defaults read com.google.Keystone.Agent


gives a lot of info confirming me that the GoogleSoftwareUpdate is active and configured.

Stop the agent

cd /Library/LaunchAgents
launchctl unload com.google.keystone.agent.plist


Uninstall GoogleSoftwareUpdate

cd ~/Library/Google
python GoogleSoftwareUpdate/GoogleSoftwareUpdate.bundle/Contents/Resources/GoogleSoftwareUpdateAgent.app/Contents/Resources/install.py --uninstall

defaults read com.google.Keystone.Agent


outputs:

Domain com.google.Keystone.Agent does not exist


which confirms that the GoogleSoftwareUpdate doesn't have any more
any default configured.

Clean up

cd ~/Library/Google
rm -rf GoogleSoftwareUpdate

cd ~/Library/Logs
rm GoogleSoftwareUpdateAgent.log

cd /Library/LaunchAgents
/usr/bin/sudo rm com.google.keystone.agent.plist

cd /Library/Google
/usr/bin/sudo rm -rf GoogleSoftwareUpdate