The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d3cf2f3b6d5be9a44886c5e852c5a4c325cc2a43

commit d3cf2f3b6d5be9a44886c5e852c5a4c325cc2a43
Author: Joey Arhar <jarhar@chromium.org>
Date: Tue Oct 23 20:58:29 2018

[DevTools] Add metrics to network panel film strip

Bug:  896828 
Change-Id: I6376b04e01e962e45e1b1218097e8446d26dc3b3
Reviewed-on: https://chromium-review.googlesource.com/c/1289511
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Joey Arhar <jarhar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#602085}
[modify] https://crrev.com/d3cf2f3b6d5be9a44886c5e852c5a4c325cc2a43/third_party/WebKit/LayoutTests/http/tests/devtools/user-metrics-expected.txt
[modify] https://crrev.com/d3cf2f3b6d5be9a44886c5e852c5a4c325cc2a43/third_party/blink/renderer/devtools/front_end/host/UserMetrics.js
[modify] https://crrev.com/d3cf2f3b6d5be9a44886c5e852c5a4c325cc2a43/third_party/blink/renderer/devtools/front_end/network/NetworkPanel.js
[modify] https://crrev.com/d3cf2f3b6d5be9a44886c5e852c5a4c325cc2a43/tools/metrics/histograms/enums.xml