Revert "Revert "Disable resource cache in shadow_utils GM for now""

Revert "Revert "Disable resource cache in shadow_utils GM for now""

This reverts commit 0b58ef7b525e5325ecd194c4b470e4c924cbb56a.

Reason for revert: Wasn't actually fixed.

Original change's description:
> Revert "Disable resource cache in shadow_utils GM for now"
>
> This reverts commit c34a946d5a975ba8b8cd51f79b55174a5ec0f99f.
>
> Reason for revert: This is probably fixed with https://skia-review.googlesource.com/c/17279/.
>
> Original change's description:
> > Disable resource cache in shadow_utils GM for now
> >
> > This should make the GMs more stable in tiled mode.
> >
> > Change-Id: I72996b1305fc99e60626af35267952d0a5c38624
> > Reviewed-on: https://skia-review.googlesource.com/17275
> > Reviewed-by: Mike Reed <reed@google.com>
> > Commit-Queue: Jim Van Verth <jvanverth@google.com>
> >
>
> TBR=jvanverth@google.com,reed@google.com
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
>
> Change-Id: I0d21652a301b3f81e7ec04638bedbaabc723e583
> Reviewed-on: https://skia-review.googlesource.com/17304
> Reviewed-by: Jim Van Verth <jvanverth@google.com>
> Commit-Queue: Jim Van Verth <jvanverth@google.com>
>

TBR=mtklein@google.com,jvanverth@google.com,reviews@skia.org,reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: If606795bfeb4e6ed78f199fcb86ee2767bde5216
Reviewed-on: https://skia-review.googlesource.com/17371
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>