interactive_ui_tests runs on following Windows bots:

chromium.win:

Win 7 Tests x64 (1)
Win x64 GN
Win7 Tests (1)
Win7 Tests (dbg)(1)
Win8 Aura

chromium.fyi:

(none)

Actually, scratch that, it compiles it on "Win8 Aura" but doens't seem to run it. So perhaps this has been failing for a while. We don't seem to have any interactive_ui_tests coverage on Win8 or Win10...?

So yes, it seems they don't work on win8 either - https://codereview.chromium.org/1795853002 and we've just never had any test coverage.

Devlin, who's handling browser actions these days?

though not exact that test, same error message on fedora 22 x86 normal first run after build. 
Chromium	51.0.2677.0 (개발자 빌드) custom (32비트)
개정	bc6d3a094cbcd748ad14b8d73bfa571ef101cc07-refs/heads/master@{#380896}

[2132:2132:0314/151943:ERROR:shell.cc(265)] Error: Instance: exe:chrome attempting to register an instance for a process it created for target: exe:chrome_renderer without the mojo:shell{client_process} capability class.

I think the mojo shell error is something unrelated to this issue. see  issue 594419 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3dbedd030a19e84b9f5cc366daea1ea20556d5c0

commit 3dbedd030a19e84b9f5cc366daea1ea20556d5c0
Author: rdevlin.cronin <rdevlin.cronin@chromium.org>
Date: Tue Mar 15 00:13:34 2016

[Extensions] Fix BrowserActionInteractiveTest.TabSwitchClosesPopup

BUG= 594417 

Review URL: https://codereview.chromium.org/1799223002

Cr-Commit-Position: refs/heads/master@{#381125}

[modify] https://crrev.com/3dbedd030a19e84b9f5cc366daea1ea20556d5c0/chrome/browser/extensions/api/extension_action/browser_action_interactive_test.cc

When I ran the CL to fix this (https://codereview.chromium.org/1799223002) through win8 with interactive_ui_tests enabled, it all looked good.  I think it's fixed.  Feel free to re-open if it turns out it's not.

thanks for fixing this so quickly. I am now enabling interactive_ui_tests on the win8 trybot, and the win10 fyi bot.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1a8e1ace81a75681667d5475ffb9558f3bb520fc

commit 1a8e1ace81a75681667d5475ffb9558f3bb520fc
Author: wfh <wfh@chromium.org>
Date: Tue Mar 15 03:32:33 2016

Add interactive_ui_tests to Windows 10 fyi bot.

BUG= 508743 , 594417 

Review URL: https://codereview.chromium.org/1799343002

Cr-Commit-Position: refs/heads/master@{#381166}

[modify] https://crrev.com/1a8e1ace81a75681667d5475ffb9558f3bb520fc/testing/buildbot/chromium.fyi.json

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e040041ab6a37553a6feb5717472926c4fa4bc9d

commit e040041ab6a37553a6feb5717472926c4fa4bc9d
Author: wfh <wfh@chromium.org>
Date: Tue Mar 15 03:32:56 2016

Add interactive_ui_tests to Win8 Aura config.

BUG=373973, 594417 

Review URL: https://codereview.chromium.org/1795853002

Cr-Commit-Position: refs/heads/master@{#381167}

[modify] https://crrev.com/e040041ab6a37553a6feb5717472926c4fa4bc9d/testing/buildbot/chromium.win.json

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fbd4ec4edc6087a29aa7e6bbde8c983ef2fa8439

commit fbd4ec4edc6087a29aa7e6bbde8c983ef2fa8439
Author: sky <sky@chromium.org>
Date: Mon Mar 21 17:53:33 2016

Revert of Add interactive_ui_tests to Win8 Aura config. (patchset #1 id:1 of https://codereview.chromium.org/1795853002/ )

Reason for revert:
interactive_ui_tests don't run well on win8 machines yet. See http://crbug.com/595071 . Reverting until sorted out.

Original issue's description:
> Add interactive_ui_tests to Win8 Aura config.
>
> BUG=373973, 594417 
>
> Committed: https://crrev.com/e040041ab6a37553a6feb5717472926c4fa4bc9d
> Cr-Commit-Position: refs/heads/master@{#381167}

TBR=dpranke@chromium.org,wfh@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=373973, 594417 ,595071

Review URL: https://codereview.chromium.org/1823583003

Cr-Commit-Position: refs/heads/master@{#382322}

[modify] https://crrev.com/fbd4ec4edc6087a29aa7e6bbde8c983ef2fa8439/testing/buildbot/chromium.win.json

FWIW, this bug sounds like a fallout of https://codereview.chromium.org/1544803004

I had to handle BrowserActionInteractiveTest.TabSwitchClosesPopup separately for that CL which might have broken things on Win8 and/or Win10.