Add Correctness tests for Chromecast

Bug: skia:
NOTRY=true
Change-Id: Ib604bad8eda6ba4382b850f7c5f318fb0f114401
Reviewed-on: https://skia-review.googlesource.com/20051
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Eric Boren <borenet@google.com>
9 files changed