This adds the "k" prefix.

Bug: angleproject:3024
Change-Id: I3771a8a9d90cd5edc7173f2b3817a5f1f053bdd4
Reviewed-on: https://chromium-review.googlesource.com/c/1392399Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>