Fix size of vertices GM to show all content

Change-Id: Ib0c567da03fe9373cdfeb23291c1f448571668b3
Reviewed-on: https://skia-review.googlesource.com/8317
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
1 file changed