Allow supporting 1 older PICTURE_VERSION.

Allows https://codereview.chromium.org/14230022/ to be submitted
without breaking bench_pictures and render_pictures.

After DEPS roll and SKP capture, this will be reverted.

Review URL: https://codereview.chromium.org/14158015

git-svn-id: http://skia.googlecode.com/svn/trunk@8918 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed