implement USB mass storage class using the bulk-only transport
protocol with the transparent SCSI command set.
BRANCH=none
BUG=none
TEST=verify that usb mass storage functions on windows xp, 7, 8, mac os x, goobuntu precise
Change-Id: Ideecad55bd275df7b30aa4a3ed263304a3a109cd
Signed-off-by: Dominic Chen <ddchen@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/206303
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
