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This will reduce the amount of manual change that must be made when
updating configuration for a branch and put more values inline in the
config.

Change-Id: I033beff961f1d88a30795e12ca7f784abd0c331a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2551668
Auto-Submit: Garrett Beaty <gbeaty@chromium.org>
Reviewed-by: Erik Staab <estaab@chromium.org>
Commit-Queue: Erik Staab <estaab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829857}