Update #if to #ifdef for consistency

R=mtklein@google.com

Author: djsollen@google.com

Review URL: https://codereview.chromium.org/26495002

git-svn-id: http://skia.googlecode.com/svn/trunk/src@11653 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed