Revert "Revert of impl colormatrix w/ floats (patchset #7 id:120001 of https://codereview.chromium.org/967943002/)"

disabled for the momment -- need to understand arm64 glitches

This reverts commit 374a4c3b744e8c77455efa73b139950136f7b374.

BUG=skia:
TBR=

Review URL: https://codereview.chromium.org/1028403002
4 files changed