Looks like same as internal issue 598373.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f6c04cf1d3aac4d7bbcbb52cb2127b5ef521c73d

commit f6c04cf1d3aac4d7bbcbb52cb2127b5ef521c73d
Author: pavor <pavor@yandex-team.ru>
Date: Thu Sep 29 10:41:02 2016

correct displaying URLs on domain-reliability-internals page

DomainReliabilityContext::GetWebUIData() puts into dictionary URL
to the entry with name "origin", but domain_reliability_internals.html
tries to display "domain" data field as URL.

R=dbeam@chromium.org, ttuttle@chromium.org
BUG= 641876 
TEST=Force Domain Reliability feature and load chrome://domain-reliability-internals page
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2290563002
Cr-Commit-Position: refs/heads/master@{#421795}

[modify] https://crrev.com/f6c04cf1d3aac4d7bbcbb52cb2127b5ef521c73d/chrome/browser/resources/domain_reliability_internals.html

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available. If you change it back, also remove the "Hotlist-Recharge-Cold" label.

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I've confirmed with juliatuttle@ that it is fixed now.