UNDO Terminal Demand

Hi all!

Super dumb of me, trying new things and such but I entered a command in terminal:

open /Applications/Google\ Chrome.app --args --open-file-access-from-files

trying to get Google chrome open local files,

I don't really need it now so just wanted to know how I can fix it, and it's doing weird things to some of my files.

I've tried this command:

open /Applications/Google\ Chrome.app --args --block-file-access-from-files

but it hasn't done anything.

I've also tried to but the # in front of the commands but it doesn't seem to do much either.

Any help would be appreciated!

My operating system is Yosemite.

Also, does it really disable internet security? Is it really bad that I've done this?

Arghh! Help!

Thanks!