Init graphics in bench_pictures.

Should fix http://code.google.com/p/skia/issues/detail?id=858
Review URL: https://codereview.appspot.com/6490100

git-svn-id: http://skia.googlecode.com/svn/trunk@5475 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed