Revert of Skip SkSharedMutexMultiThreaded test on TSAN bot while investigating. (patchset #1 id:1 of https://codereview.chromium.org/1213033003/)

Reason for revert:
Add tsan annotations to repair tests.

Original issue's description:
> Skip SkSharedMutexMultiThreaded test on TSAN bot while investigating.
>
> The ~ means "don't run this".  This keeps all the other bots running the code, skipping it only on the whiny TSAN bot.
>
> BUG=skia:3997
>
> Committed: https://skia.googlesource.com/skia/+/37cc0b2e31e4a078b12790253d7032d36271440c

TBR=mtklein@google.com,mtklein@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:3997

Review URL: https://codereview.chromium.org/1218153004
2 files changed