Revert of Creating framework for drawShadowedPicture (patchset #14 id:260001 of https://codereview.chromium.org/2146073003/ )

Reason for revert:
Decided to re-wait for a final LGTM.

Already found a bug in variable naming to fix.

Original issue's description:
> Creating framework for drawShadowedPicture
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2146073003
>
> Committed: https://skia.googlesource.com/skia/+/0ae097d116f4332be02a135ffc99c162473dee6a

TBR=reed@google.com,robertphillips@google.com,bsalomon@google.com,jvanverth@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2167223002
19 files changed