In skia_test.cc, atomics -> mutex.

These guys are not heavily contended nor speed critical.  No need for atomics,
plus this makes tsan stop complaining (correctly) about reading fNextIndex
unsafely in onEnd.

I took a look at failCount/fFailCount, which I think is safely atomic and quite
conveniently so:  It's never read until all the threads which could possibly
increment it have terminated (except for the one where it was created,
obviously).  We could guard it with a mutex too, but maybe we can let this one
slide.

BUG=
R=bungeman@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/25357002

git-svn-id: http://skia.googlecode.com/svn/trunk@11561 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed