See issue 24182.

Current entries excluding virtual/mojo-loading:

crbug.com/24182 http/tests/xmlhttprequest/timeout/xmlhttprequest-timeout-aborted.html [ Slow ]
crbug.com/420240 http/tests/xmlhttprequest/xmlhttprequest-json-response-overflow.html [ Slow ]
 crbug.com/9798  http/tests/xmlhttprequest/access-control-basic-allow-preflight-cache-timeout.html [ Slow ]
crbug.com/24182 http/tests/xmlhttprequest/simple-cross-origin-progress-events.html [ Slow ]

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2122b4d005c760e6acef72c241c3d91821140dbf

commit 2122b4d005c760e6acef72c241c3d91821140dbf
Author: yhirano <yhirano@chromium.org>
Date: Wed Apr 12 08:30:32 2017

Remove no longer slow XHR entries from SlowTests

BUG= 710751 
R=tyoshino@chromium.org

Review-Url: https://codereview.chromium.org/2812093003
Cr-Commit-Position: refs/heads/master@{#463965}

[modify] https://crrev.com/2122b4d005c760e6acef72c241c3d91821140dbf/third_party/WebKit/LayoutTests/SlowTests

Currently there is only one:

crbug.com/420240 http/tests/xmlhttprequest/xmlhttprequest-json-response-overflow.html [ Slow ]

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

There are no slow tests for http/tests/xmlhttprequest!