... when reconfiguring const fields to mutable fields.

Bug: chromium:747979, chromium:738763, chromium:745844
Change-Id: Ibfac1b875a1da8234966ac10658260f1cc718fe5
Reviewed-on: https://chromium-review.googlesource.com/583647Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46854}