This removes most of the NSS files and both the use_openssl build argument and
macro since we no longer have any platforms using NSS for crypto/SSL.

BUG=604728
TBR=kelvinp@chromium.org

Review URL: https://codereview.chromium.org/1882433002

Cr-Commit-Position: refs/heads/master@{#388517}
191 files changed