Enable TLS 1.3 by default.

Bug: 630147
Change-Id: I20541f77c7e9e8d5a0085452d2a883e24563083c
Reviewed-on: https://chromium-review.googlesource.com/c/1330069
Commit-Queue: Steven Valdez <svaldez@chromium.org>
Reviewed-by: Adam Langley <agl@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Reviewed-by: David Benjamin <davidben@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609504}
14 files changed