Actually test our ref-counting in release builds

BUG=skia:

Change-Id: I8df5c84bf961a3be68a642ba338fdc641e09df59
Reviewed-on: https://skia-review.googlesource.com/8889
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed