Make ops used in OnFlushCallbackTest be non-legacy GrMeshDrawOps.

Change-Id: Idf7f838bcdda200aeea1bfbcd5eea7cbebd76aa2
Reviewed-on: https://skia-review.googlesource.com/23005
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed