Revert of Missing volatile in AnnotateBenignRaceSized declaration. (https://codereview.chromium.org/380473002/)

Reason for revert:
sdf

Original issue's description:
> Missing volatile in AnnotateBenignRaceSized declaration.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/f7a180b

R=mtklein@chromium.org
TBR=mtklein@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/379623004
1 file changed