Bin circular blur profile textures by scale and blur to radius ratio.

This reduces the number of profile textures that will be generated throughout an animation and also caps the texture size. It could probably be better tuned.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2062743003

Review-Url: https://codereview.chromium.org/2062743003
2 files changed