Revert of SkDrawCommand scrubbing (patchset #2 id:20001 of https://codereview.chromium.org/706363002/)

Reason for revert:
Canary borkage.

Original issue's description:
> SkDrawCommand scrubbing
>
> Remove unused ctor, constify, etc.
>
> R=robertphillips@google.com
>
> Committed: https://skia.googlesource.com/skia/+/1931ec5b5dac68f1e452af0c65161bdce35b2dec

TBR=robertphillips@google.com
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/712683002
6 files changed