And before I forget: Remove UnitTest() method declaration from GrRedBlackTree

I forgot to remove it while doing r13233
(https://codereview.chromium.org/137423009/)

BUG=None
TEST=tests
TBR=robertphillips@google.com

Review URL: https://codereview.chromium.org/145973010

git-svn-id: http://skia.googlecode.com/svn/trunk@13235 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed