Fix windows build.

Windows won't let me insert #ifdefs inside macro expansion.

R=borenet@google.com
TBR=borenet
NOTRY=true

Author: scroggo@google.com

Review URL: https://codereview.chromium.org/289853003

git-svn-id: http://skia.googlecode.com/svn/trunk@14769 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed