special device for not drawing -- performs no clipping

Running nanobench clip_overhead_recording_lite

Before : 240us
After  : 177us

BUG=skia:6214

Change-Id: I9ae6f9170c151798ffdc6c584a48b08cc7705d6b
Reviewed-on: https://skia-review.googlesource.com/9409
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Reviewed-by: Derek Sollenberger <djsollen@google.com>
4 files changed