Any updates on this?

Note that the tests are almost certainly failing because of the usage of /deep/ at https://cs.chromium.org/chromium/src/chrome/browser/chromeos/login/enterprise_enrollment_browsertest.cc?l=40-52.

There might be more things to be fixed, but this is definitely one of them, also see issue 860069.

Hey, sorry for the delay. I wanted to fix it together with new tests, but the CL got delayed. I've uploaded fix here: https://chromium-review.googlesource.com/c/chromium/src/+/1233839 . Did I enable test correctly?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fb8a5c1c9693f580f0ac5fee919559b43958e587

commit fb8a5c1c9693f580f0ac5fee919559b43958e587
Author: Roman Sorokin <rsorokin@chromium.org>
Date: Wed Sep 19 18:31:09 2018

cros: Fix browsertests for polymer2

Now uses '$.' instead of  '/deep/' to find elements

BUG= chromium:875480 

Change-Id: I1c7282cce123047987f436fd90018409545069f7
Reviewed-on: https://chromium-review.googlesource.com/1233839
Reviewed-by: Alexander Alekseev <alemate@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Roman Sorokin <rsorokin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592486}
[modify] https://crrev.com/fb8a5c1c9693f580f0ac5fee919559b43958e587/chrome/browser/chromeos/login/enterprise_enrollment_browsertest.cc
[modify] https://crrev.com/fb8a5c1c9693f580f0ac5fee919559b43958e587/testing/buildbot/filters/webui_polymer2_browser_tests.filter

Hi Roman, does this bug require any manual verification by Enterprise Test Team? If yes, could you please provide some steps for that?

The tests enabled by fb8a5c1c9693f580f0ac5fee919559b43958e587 are failing in ChromiumOS MSan bots.
See  issue 887577 .

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a9d86c3a93db21da7f138ed62161abbdf0e7fcba

commit a9d86c3a93db21da7f138ed62161abbdf0e7fcba
Author: Colin Blundell <blundell@chromium.org>
Date: Tue Sep 25 08:46:11 2018

Revert "cros: Fix browsertests for polymer2"

This reverts commit fb8a5c1c9693f580f0ac5fee919559b43958e587.

Reason for revert: These tests have been failing since they were re-enabled. See https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Linux%20ChromiumOS%20MSan%20Tests/8598 for an example failing run, and
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Linux%20ChromiumOS%20MSan%20Tests/8598 for an example failure.

Original change's description:
> cros: Fix browsertests for polymer2
> 
> Now uses '$.' instead of  '/deep/' to find elements
> 
> BUG= chromium:875480 
> 
> Change-Id: I1c7282cce123047987f436fd90018409545069f7
> Reviewed-on: https://chromium-review.googlesource.com/1233839
> Reviewed-by: Alexander Alekseev <alemate@chromium.org>
> Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
> Commit-Queue: Roman Sorokin <rsorokin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#592486}

TBR=alemate@chromium.org,rsorokin@chromium.org,dpapad@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug:  chromium:875480 
Change-Id: Id849341926fdc966454fbc6dc3c4ff9b180dc43c
Reviewed-on: https://chromium-review.googlesource.com/1242356
Commit-Queue: Colin Blundell <blundell@chromium.org>
Reviewed-by: Roman Sorokin <rsorokin@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593864}
[modify] https://crrev.com/a9d86c3a93db21da7f138ed62161abbdf0e7fcba/chrome/browser/chromeos/login/enterprise_enrollment_browsertest.cc
[modify] https://crrev.com/a9d86c3a93db21da7f138ed62161abbdf0e7fcba/testing/buildbot/filters/webui_polymer2_browser_tests.filter

Re-opening since the CL was reverted.

rsorokin: Any updates here?

Investigating here: https://bugs.chromium.org/p/chromium/issues/detail?id=887577#c8

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/425cab216f5202b395bffe79dcabd40e31bea0d6

commit 425cab216f5202b395bffe79dcabd40e31bea0d6
Author: Roman Sorokin <rsorokin@chromium.org>
Date: Mon Oct 15 07:57:22 2018

Disable Active Directory enrollment tests on MSAN

BUG= chromium:887577 , chromium:875480 

Change-Id: I0579e0694e1e4f7c9ed3f1988f623b2558a36e40
Reviewed-on: https://chromium-review.googlesource.com/c/1278167
Reviewed-by: Alexander Alekseev <alemate@chromium.org>
Commit-Queue: Roman Sorokin <rsorokin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599585}
[modify] https://crrev.com/425cab216f5202b395bffe79dcabd40e31bea0d6/chrome/browser/chromeos/login/enterprise_enrollment_browsertest.cc
[modify] https://crrev.com/425cab216f5202b395bffe79dcabd40e31bea0d6/testing/buildbot/filters/webui_polymer2_browser_tests.filter

Marking as Verified since Blockedon bug was removed.