tree 2d3bd7380f03fb5696e8e61a1f1266e4553cdca6
parent 42bd6bfd0dff456e8c3ec98ca8181a5fa02398f8
author herb <herb@google.com> 1442414777 -0700
committer Commit bot <commit-bot@chromium.org> 1442414777 -0700

Add subtract to atomics.

BUG=skia:

Review URL: https://codereview.chromium.org/1348113004