Remove GetGr() hack.

It seems no GM are using this.

BUG=None
TEST=SampleApp
R=bsalomon@google.com, caryclark@google.com

Author: tfarina@chromium.org

Review URL: https://codereview.chromium.org/144543003

git-svn-id: http://skia.googlecode.com/svn/trunk@13141 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed