TSAN: use somewhat pithier SK_ANNOTATE_UNPROTECTED_READ.
This is a little bit better practice to be i than the existing SK_ANNOTATE_BENIGN_RACE, as UNPROTECTED_READ will only ignore reads, not writes.
Tag SkRefCnt::unique() as a safe unprotected read like SkOnce's double-checked locking.
BUG=skia:
R=reed@google.com, bungeman@google.com
Author: mtklein@google.com
Review URL: https://codereview.chromium.org/144953005
git-svn-id: http://skia.googlecode.com/svn/trunk@13309 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed