The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/43c00b6dfca02767efa66d7fb110c7cbf28bc019

commit 43c00b6dfca02767efa66d7fb110c7cbf28bc019
Author: warx <warx@chromium.org>
Date: Tue Apr 04 16:23:40 2017

cros: Fix keyboard navigation focus get lost when system tray set to invisible on oobe

Changes:
(1) add tray->visible() check in WebUILoginView::TakeFocus().
(2) add else branch to avoid an invisible focus stop.

BUG= 707977 
TEST=test that focus loop works

Review-Url: https://codereview.chromium.org/2794153002
Cr-Commit-Position: refs/heads/master@{#461741}

[modify] https://crrev.com/43c00b6dfca02767efa66d7fb110c7cbf28bc019/chrome/browser/chromeos/login/ui/webui_login_view.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/53436789712c58d9f7d512e6615b4acf46e52f28

commit 53436789712c58d9f7d512e6615b4acf46e52f28
Author: foolip <foolip@chromium.org>
Date: Thu Apr 06 04:28:14 2017

Revert of cros: Fix keyboard navigation focus get lost when system tray set to invisible on oobe (patchset #1 id:1 of https://codereview.chromium.org/2794153002/ )

Reason for revert:
AutofillInteractiveTest.AutofillAfterReload became flaky right after
this landed. The test involves focus (FocusFirstNameField()) and the
change also involves focus, so there is likely a connection.

BUG= 708861 

Original issue's description:
> cros: Fix keyboard navigation focus get lost when system tray set to invisible on oobe
>
> Changes:
> (1) add tray->visible() check in WebUILoginView::TakeFocus().
> (2) add else branch to avoid an invisible focus stop.
>
> BUG= 707977 
> TEST=test that focus loop works
>
> Review-Url: https://codereview.chromium.org/2794153002
> Cr-Commit-Position: refs/heads/master@{#461741}
> Committed: https://chromium.googlesource.com/chromium/src/+/43c00b6dfca02767efa66d7fb110c7cbf28bc019

TBR=xiyuan@chromium.org,warx@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG= 707977 

Review-Url: https://codereview.chromium.org/2801853003
Cr-Commit-Position: refs/heads/master@{#462355}

[modify] https://crrev.com/53436789712c58d9f7d512e6615b4acf46e52f28/chrome/browser/chromeos/login/ui/webui_login_view.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f645439ea16d03a4c70722d72f611a85eeea5ffd

commit f645439ea16d03a4c70722d72f611a85eeea5ffd
Author: warx <warx@chromium.org>
Date: Thu Apr 06 21:41:44 2017

reland: cros: Fix keyboard navigation focus get lost when system tray set to invisible on oobe

Changes:
Reland reverted CL: crrev.com/2794153002 as it is not the reason causing the flaky test: AutofillInteractiveTest.AutofillAfterReload.

TBR=xiyuan@chromium.org, foolip@chromium.org
BUG= 707977 
test=none

Review-Url: https://codereview.chromium.org/2806583002
Cr-Commit-Position: refs/heads/master@{#462630}

[modify] https://crrev.com/f645439ea16d03a4c70722d72f611a85eeea5ffd/chrome/browser/chromeos/login/ui/webui_login_view.cc

Chrome OS 9532.0.0, 60.0.3092.0