It sounds from the context link like font style differences (bold, underline, italics) or a contrast difference of 3:1 with surrounding text would be ok.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4cf4ff7aa5b049728149b2a55e6a021301fa6657

commit 4cf4ff7aa5b049728149b2a55e6a021301fa6657
Author: Jeremy Klein <jlklein@google.com>
Date: Fri Oct 12 01:29:37 2018

Fix a11y test error for multidevice settings.

Adding a temporary exception for one link-in-text-block error. This
error comes from the fact that we (intentionally) removed the underline
from the learn more links in our settings. I've filed crbug.com/894602
to work with UX on a new strategy and remove this exception.

Bug: 894602
Change-Id: I0da37adfee02699415a011939dbfc6d4e1d93f34
Reviewed-on: https://chromium-review.googlesource.com/c/1278131
Commit-Queue: Jeremy Klein <jlklein@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599059}
[modify] https://crrev.com/4cf4ff7aa5b049728149b2a55e6a021301fa6657/chrome/test/data/webui/settings/a11y/multidevice_features_a11y_test.js

I thought removing the underlines was WAD. Elizabeth could you confirm?

Yeah, it *is* working as shown in the mocks and spec (no underlines). However, the lack of underlines for a link is going against accessibility guidelines and is causing this test to fail. The exact error is:

"Links must be distinguished from surrounding text in a way that does not rely on color".

This issue has an owner, a component and a priority, but is still listed as untriaged or unconfirmed. By definition, this bug is triaged. Changing status to "assigned". Please reach out to me if you disagree with how I've done this.