GitLab

The summary child in the histogram tag should not be empty.

Change-Id: I7030df527b7852bd36de9e37ab48d09fca600d51
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422985
Auto-Submit: Weilun Shi <sweilun@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Weilun Shi <sweilun@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810015}