Forking https://bugs.chromium.org/p/chromium/issues/detail?id=883892#c8 into a separate issue and assigning to the benchmark owner yuzus@

yuzus@, ptal. The errors suggest that WPR archive is either out of date or broken.

Comment by fdoray@:

I saw 2 failures in the last hour at https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Leak%20Detection%20Linux

I'm seeing HTTP errors 500 and 404 in the log. Is this expected?

  [ RUN      ] memory.leak_detection/http://www.bestdic.ir
  (WARNING) 2018-09-28 11:45:30,518 inspector_log._OnMessage:26  DevTools console [network]: Failed to load resource: the server responded with a status of 500 (Internal Server Error) http://www.bestdic.ir/
  [       OK ] memory.leak_detection/http://www.bestdic.ir (9969 ms)
  [ RUN      ] memory.leak_detection/http://www.privacyassistant.net
  (WARNING) 2018-09-28 11:45:40,480 inspector_log._OnMessage:26  DevTools console [network]: Failed to load resource: the server responded with a status of 500 (Internal Server Error) http://www.privacyassistant.net/
  [       OK ] memory.leak_detection/http://www.privacyassistant.net (9973 ms)
  [ RUN      ] memory.leak_detection/http://www.sklavenzentrale.com
  [       OK ] memory.leak_detection/http://www.sklavenzentrale.com (10502 ms)
  [ RUN      ] memory.leak_detection/http://www.podbay.fm
  (WARNING) 2018-09-28 11:46:00,969 inspector_log._OnMessage:26  DevTools console [network]: Failed to load resource: the server responded with a status of 404 (Not Found) http://podbay.fm/html/
  [       OK ] memory.leak_detection/http://www.podbay.fm (10587 ms)
  [ RUN      ] memory.leak_detection/http://www.coco.fr
  [       OK ] memory.leak_detection/http://www.coco.fr (10294 ms)
  [ RUN      ] memory.leak_detection/http://www.skipaas.com
  [       OK ] memory.leak_detection/http://www.skipaas.com (10375 ms)
  [ RUN      ] memory.leak_detection/http://www.chatword.org
  (WARNING) 2018-09-28 11:46:32,218 inspector_log._OnMessage:26  DevTools console [network]: Failed to load resource: the server responded with a status of 500 (Internal Server Error) http://www.chatword.org/