Increase tolerance in rectilinear quad detection

Bug: chromium:923946
Change-Id: Idabe4dde28aa37e42e573c36fba9cdb8c0135689
Reviewed-on: https://skia-review.googlesource.com/c/185685
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
1 file changed