Fix rebaseline.py self-test to account for r9859

R=robertphillips@google.com

Review URL: https://codereview.chromium.org/18559002

git-svn-id: http://skia.googlecode.com/svn/trunk@9872 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed