Revert of Make NVPR a GL context option instead of a GL context (patchset #9 id:160001 of https://codereview.chromium.org/1448883002/ )

Reason for revert:
"Could not create surface" on Linux GTX660 bots

Original issue's description:
> Make NVPR a GL context option instead of a GL context
>
> Make NVPR a GL context option instead of a GL context.
> This may enable NVPR to be run with command buffer
> interface.
>
> No functionality change in DM or nanobench. NVPR can
> only be run with normal GL APIs.
>
> BUG=skia:2992
>
> Committed: https://skia.googlesource.com/skia/+/eeebdb538d476c1bfc8b63a946094ca1b505ecd1
>
> Committed: https://skia.googlesource.com/skia/+/64492c43c3faee7ab0f69b1c84e0267616f85e52

TBR=mtklein@google.com,bsalomon@google.com,jvanverth@google.com,scroggo@google.com,kkinnunen@nvidia.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:2992

Review URL: https://codereview.chromium.org/1513703002
9 files changed