GitLab

With gmock, if any of the expectations fail, we will see a diff of
the contents - in particular, we'll see the extra histogram name
if there is one.

Bug: 863262
Change-Id: Iff375adf1ebbc0a14d64005f48dd574efb45b8dc
Reviewed-on: https://chromium-review.googlesource.com/1146907Reviewed-by: Brian White <bcwhite@chromium.org>
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577526}