Revert 234367 "Base: Make RegistryOverrideManager support sharde..."

Revert 234367 "Base: Make RegistryOverrideManager support sharde..."

> Base: Make RegistryOverrideManager support sharded/parallel tests.
> 
> BUG=314800
> TBR=ajwong@chromium.org
> 
> Review URL: https://codereview.chromium.org/57423008

TBR=tommycli@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=234627

[tommycli, 2013-11-12 20:38:09]

Committed patchset #1 manually as r234627.

[grt (UTC plus 2), 2013-11-12 20:45:13]

Thanks. If you don't beat me to it, I have a change underway to fix RLZ's tests
to use the override manager in a sane way. Unfortunately, it's a bigger job than
I thought so I won't have it ready for a little while yet. I'll send a CR your
way in a bit.

[tommycli, 2013-11-12 21:18:52]

On 2013/11/12 20:45:13, grt wrote:
> Thanks. If you don't beat me to it, I have a change underway to fix RLZ's
tests
> to use the override manager in a sane way. Unfortunately, it's a bigger job
than
> I thought so I won't have it ready for a little while yet. I'll send a CR your
> way in a bit.

Oh okay cool. Yeah I reverted it due to the RLZ tests.

I haven't done anything with the RLZ tests yet, so I'm happy to provide a review
for you.