Revert of Stop closing batch prematurely (patchset #4 id:60001 of https://codereview.chromium.org/
1092403002/)
Reason for revert:
breaking windows bots
Original issue's description:
> In this CL we stop closing batches prematurely, and only close immediately before a flush.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/
db3ce12c810ead7b76faa784e7293197aca0d9f1
TBR=bsalomon@google.com,robertphillips@google.com,joshualitt@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:
Review URL: https://codereview.chromium.org/
1109773003