Enable -Wdeprecated-register (except on CrOS).

No behavior change.

BUG=255186,705812

Review-Url: https://codereview.chromium.org/2780623003
Cr-Original-Commit-Position: refs/heads/master@{#459973}
Committed: https://chromium.googlesource.com/chromium/src/+/76ad12fee73e4512dbb9c7a79ffb6cec33fae6f2
Review-Url: https://codereview.chromium.org/2780623003
Cr-Commit-Position: refs/heads/master@{#460879}
8 files changed