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Re-uses existing helpers to make these truly empty impls in non-dcheck
builds.

Most importantly, this allows instrumenting these calls with extra
tracing information when debugging without having to rebuild the world
(thread_restrictions.h is implicitly included virtually everywhere).

(and yes they should be outright removed in favor of the new ones but
that's orthogonal to this CL)

R=fdoray@chromium.org

Bug: gab doesn't like to rebuild the world when debugging
Change-Id: I6f7f39a26164c4375fd9b48233236a528b0fa2b5
Reviewed-on: https://chromium-review.googlesource.com/969446
Commit-Queue: François Doray <fdoray@chromium.org>
Reviewed-by: François Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#544340}