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This is the last Gallery unittest not closure compiled.

Bug: 867700
Change-Id: I6e4c2b2cf23b80967e060d838dd3872b55306daf
Reviewed-on: https://chromium-review.googlesource.com/1184644Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Trent Apted <tapted@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585677}