Upscaling demo

Change-Id: I22f26ff2a618f95f6f4f9ab0962a3fede509f1e6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/379837
Auto-Submit: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed