Added an option to specify the tiling size to render_pictures.

With this change I should be able to start merging the rendering implementations of bench_pictures and render_pictures.

Review URL: https://codereview.appspot.com/6427061

git-svn-id: http://skia.googlecode.com/svn/trunk@4816 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed