revise p3 GM

I've added a little auto-grader.
I think it's logic makes sense, but I'd appreciate fresh eyes on it.

Now with anti-aliased text.

Change-Id: I43a6d69251d4d93fbd70533f5c4d1cc281e4498b
Reviewed-on: https://skia-review.googlesource.com/154000
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed