mojo security and style guide: populate initial version

Change-Id: I64e56fe66cc445d3784b58cee2253448ae5dcc3e
Reviewed-on: https://chromium-review.googlesource.com/740973
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Chris Palmer <palmer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512457}
2 files changed