Revert[2] of expand unitests for color4f

This reverts commit 5f34e8ed82e6cbf29401bda5d423a50a2ab6db74.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1622983002

TBR=

Review URL: https://codereview.chromium.org/1622983002
5 files changed