The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/86d1de95d6d87b847e21dbe7c17018cadac3b629

commit 86d1de95d6d87b847e21dbe7c17018cadac3b629
Author: Dominik Röttsches <drott@chromium.org>
Date: Sun Nov 05 15:49:17 2017

Mark updated WPT test as failing

After https://chromium-review.googlesource.com/754587
wpt/html/dom/documents/resource-metadata-management/document-lastModified-01.html
starts to fail on trybots, marking as failing for now.

NOTRY=true
TBR=foolip

Bug:  781595 
Change-Id: Ieac1c2c10c1ea770559eb7b6e1ef443f6dbfa9ac
Reviewed-on: https://chromium-review.googlesource.com/753600
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Reviewed-by: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#514067}
[modify] https://crrev.com/86d1de95d6d87b847e21dbe7c17018cadac3b629/third_party/WebKit/LayoutTests/TestExpectations

Sorry I cannot find an example. On which trybot did you find this test failing?

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.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

FYI, https://crrev.com/c/840617 removed the lines from TestExpectations that were referencing this bug some time ago. You may be able to close it now (I'm just doing a bulk update, I have not looked at the details of each test).

This test was reenabled by https://chromium-review.googlesource.com/840617 a year ago. Closing.