Enable new GrClipStack for flutter

Bug: skia:10205
Change-Id: I4dfb5b69009a41cf44ae1a2a06b71c067071a964
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/325665
Auto-Submit: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
1 file changed