GitLab

Create makefiles and integrate MR with GN build.
Add to GYP build.

BUG=460660
R=scherkus@chromium.org,DaleCurtis@chromium.org,xhwang@chromium.org,mfoltz@chromium.org,sky@chromium.org

Review URL: https://codereview.chromium.org/949293004

Cr-Commit-Position: refs/heads/master@{#320186}