Remove the last "batch tracker" from AAStrokeRectOp.

Most of the fields weren't really needed.

BUG=skia:

Change-Id: If0dbcb707b3a45d044656cbadbe118aa5583be2e
Reviewed-on: https://skia-review.googlesource.com/6338
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed