Revert of Moved Canvas->JSON and JSON->Canvas functionality into SkDebugCanvas. ...

Revert of Moved Canvas->JSON and JSON->Canvas functionality into SkDebugCanvas. (patchset #2 id:20001 of https://codereview.chromium.org/1681643002/ )

Reason for revert:
Breaking cmake build

Original issue's description:
> Moved Canvas->JSON and JSON->Canvas functionality into SkDebugCanvas.
> SkJSONCanvas and SkJSONRenderer will be deleted once the debug server
> has been updated.
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1681643002
>
> Committed: https://skia.googlesource.com/skia/+/32fff1ba0c759d97ab78320b7ae46dd7696a4e6e

TBR=jcgregorio@google.com,joshualitt@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1680853002