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Deleting Chrome is done by dragging it to the trash, followed by entering your login password for the Mac. Google likes to install additional files in your Launch folders, so to delete those go to the Finder and choose the Go menu, followed by Go to Folder. Copy and Paste each of these locations there and drag any Google file to the trash. Don't forget the "~" character at the start in the last location.
/Library/LaunchDaemons
/Library/LaunchAgents
~/Library/LaunchAgents