Revert of teach TSAN about SkSpinlock, SkRefCnt, and SkOnce (https://codereview.chrom...

Revert of teach TSAN about SkSpinlock, SkRefCnt, and SkOnce (https://codereview.chromium.org/247813005/)

Reason for revert:
breaks blink in roll

Original issue's description:
> teach TSAN about SkSpinlock, SkRefCnt, and SkOnce
>
> BUG=skia:
>
> Committed: http://code.google.com/p/skia/source/detail?r=14353
>
> NOTRY=true
> NOTREECHECKS=true
>
> Committed: http://code.google.com/p/skia/source/detail?r=14354

R=bsalomon@google.com, bungeman@google.com, mtklein@chromium.org
TBR=bsalomon@google.com, bungeman@google.com, mtklein@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/258783005

git-svn-id: http://skia.googlecode.com/svn/trunk@14389 2bbb7eff-a529-9590-31e7-b0007b416f81