GitLab

- Sets message type and class for message header
- Sets api version to the same one as gmscore

Bug: 1082305
Change-Id: I1eabab14af2ca97426a4246437c06fb7cfcbd1e3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2370982Reviewed-by: Richard Knoll <knollr@chromium.org>
Commit-Queue: Himanshu Jaju <himanshujaju@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800927}