Fix SkAtomics_win.h typos.

NOTRY=true

BUG=skia:
R=mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/293363017

git-svn-id: http://skia.googlecode.com/svn/trunk@14930 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed