libchromeos: Use the restricted set of CA certificates.

This set of CAs is intended to be good for connecting to Google
services.

BUG=brillo:288
TEST=unit tests, manual https test.

Change-Id: Icb1127c90dda5c810875cf4a22451fb06c7a5470
Reviewed-on: https://chromium-review.googlesource.com/251812
Reviewed-by: Darren Krahn <dkrahn@chromium.org>
Commit-Queue: Darren Krahn <dkrahn@chromium.org>
Tested-by: Darren Krahn <dkrahn@chromium.org>
2 files changed