The order of the scoped histogram init got clobbered from a bad
merge.

BUG=516027

Change-Id: Id5319c5a3a586b21fb64c0f161aebcfb3366722a
Reviewed-on: https://chromium-review.googlesource.com/290860Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>