GitLab

Also:
- updates build/protoc_java.py to use argparse instead of optparse.
- removes deprecated references to proto nano

Bug: 1114836
Change-Id: I184e6e262159ecb79cdf980a8c48e9d7f28c7d12
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2434908
Auto-Submit: Mohamed Heikal <mheikal@chromium.org>
Reviewed-by: Peter Wen <wnwen@chromium.org>
Commit-Queue: Mohamed Heikal <mheikal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811662}