How can I start Google Chrome on OS X with the --allow-files-access-from-files argument?
open -a "Google Chrome" --args --allow-file-access-from-files
I don't know how to adequately test the --allow-file-access-from-files switch, but it works for --incognito for me (same version and OS).
It appears as though Chrome does not like to be opened twice; when passing the -n switch to open (which is supposed to open a new instance), it immediately kills itself.
EDIT: 'allow-files-access-from-files' should be 'allow-file-access-from-files'