Revert of use colorfilter instead of imagefilter when possible (patchset #6 id:100001 of https://codereview.chromium.org/966233002/)

Reason for revert:
Lots of PDF failures -- need to investigate

Original issue's description:
> use colorfilter instead of imagefilter when possible
>
> big speed win w/ nanobench --match colorfilter_
>
> BUG=skia:
> TBR=
>
> Will require rebaselining, so landing temporarily to trigger layouttests.
>
> Committed: https://skia.googlesource.com/skia/+/f641bd076d29666a5d2a10d5384e4924b0a0e524

TBR=sugoi@google.com,senorblanco@google.com,bsalomon@google.com,reed@google.com,senorblanco@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/991693002
1 file changed