Revert of Add guards to GrTextureProvider (patchset #5 id:80001 of https://codereview.chromium.org/1567983002/ )

Reason for revert:
breaking asan bot

Original issue's description:
> Add guards to GrTextureProvider
>
> TBR=bsalomon@google.com
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1567983002
>
> Committed: https://skia.googlesource.com/skia/+/b30dd1db1d914b85a691b4724713ba1b0f16cd6c

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

Review URL: https://codereview.chromium.org/1565313003
7 files changed