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This option was added recently without any tests. This change adds a
simple test for this.

Bug: 902937
Change-Id: If35b91e8c43db434921a0a6b01beb708957aecb3
Reviewed-on: https://chromium-review.googlesource.com/c/1343813
Commit-Queue: Ben Wells <benwells@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609925}