Merged bench_pictures and render_pictures rendering methods.

bench_pictures now uses a class based method for choosing the benchmark type as well.

Review URL: https://codereview.appspot.com/6452070

git-svn-id: http://skia.googlecode.com/svn/trunk@4894 2bbb7eff-a529-9590-31e7-b0007b416f81
9 files changed