make ShadowUtils unit test pass on no-GPU builds

It thinks it should fail, but it doesn't.

Change-Id: Ie97f57dd7a9040a817b59186b2f8fa704bdda3e9
Reviewed-on: https://skia-review.googlesource.com/13404
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
1 file changed