Export GrGLCreateNullInterface for use in Chromium compositor unit tests.

R=bsalomon@google.com

Author: mvujovic@adobe.com

Review URL: https://codereview.chromium.org/86353002

git-svn-id: http://skia.googlecode.com/svn/trunk@12386 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed