Test color correction in DM

This will allow me to test and visualize some assumptions
on parsing and applying color profiles.  Also, it should
help me find and fix bugs.

This is certainly not an optimized implementation, and, as
far as I know, it doesn't take any shortcuts to improve
performance.  We'll probably want to do both of these
once we know where it fits in the pipeline.

Right now this test is only run on an arbitrary set of ~100
images from the top 10k skps.  I'll continue to add more
"interesting" images and probably tweak the code as
necessary.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1995233003

Review-Url: https://codereview.chromium.org/1995233003
6 files changed