Revert of Moved Canvas->JSON and JSON->Canvas functionality into SkDebugCanvas. (patchset #3 id:40001 of https://codereview.chromium.org/1681643002/ )

Reason for revert:
breaks various android builds, e.g.

https://android-build.storage.googleapis.com/builds/git_master-skia-linux-bullhead-userdebug/2596406/acb02999d48ace628601452700d4b4f8dcd5ed71b426e6ecdb1c7f5bc5452f7b/logs/build_error.log?Signature=BkLEdMOdi0LelP0v939QECdTZzznSD2dLFIkPu52E7%2BPr5Oj1ktq5nNlxGZn%2F4ZhCKXAw2%2FNHxy27nNJ8lffcgXn7PhQpa82bP%2B8F%2Bbyo9j%2BT%2B3etmOdQFEejJSRsEv2RrVWtKsKYRX%2FuZinrF9yD37jUpSbKNZvmvIbKa4V4IQ%3D&GoogleAccessId=701025073339-mqn0q2nvir9iurm6q5d00tdv7blbgvjr%40developer.gserviceaccount.com&Expires=1455108483

external/skia/bench/../tools/debugger/SkDrawCommand.cpp:602:9: error: use of undeclared identifier 'free'
        free(data);

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
>
> Committed: https://skia.googlesource.com/skia/+/46cb6d6b82b0ab71033aef91419e8beae25bb8a4

TBR=jcgregorio@google.com,joshualitt@chromium.org,ethannicholas@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/1683093002
5 files changed