refactor a bit

Centralize XYZD50 profile (public) and 252 random bytes (private).

Change-Id: I9fabc9d6c0f35130c62a093b1d79b406b4d53597
Reviewed-on: https://skia-review.googlesource.com/121793
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
4 files changed