Turn on threaded DMQuiltTask drawing for old-format SkPictures too.

This required the same SkBitmap copying that we added today to SkRecord.

BUG=skia:
R=reed@android.com, robertphillips@google.com, mtklein@google.com, reed@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/375703002
2 files changed