add unittest for render_pictures binary

Once committed, this will be run as part of RunToolSelfTests on http://108.170.217.252:10117/builders/Housekeeper-PerCommit .

BUG=skia:1943
R=rmistry@google.com

Author: epoger@google.com

Review URL: https://codereview.chromium.org/124253002

git-svn-id: http://skia.googlecode.com/svn/trunk@12941 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed