Chrome version: 68.0.3440.106 (Mac)
URL: https://chromeperf.appspot.com/group_report?bug_id=887335

Please copy and paste any errors from JavaScript console (Command+Option+J to open):

Please describe the problem:

When I was investigating the perf alert, I clicked on one of the alert and click "Chromium Commit Position range: 592397 - 592496". It opened a page and shows Error 404:

"""
400. That’s an error.

The requested URL was not found on this server. That’s all we know.
"""