Removing logic on showing/hiding separator

Removing logic on showing/hiding separator

Since |logout_button_tray_| is moved to the left most position
in the status area widget, the logic on hiding separator of tray
in left of the |logout_button_tray_| is no longer needed because
there is no such tray. (confirmed with @sgabriel that
|logout_button_tray_| will always be the left most one).

Note that this is a partial revert of code added in
https://codereview.chromium.org/2147143002/.

BUG=657211
Review-Url: https://codereview.chromium.org/2582923002
Cr-Commit-Position: refs/heads/master@{#439398}
(cherry picked from commit 26f5083f295844743f7e7510ba5fba5680368057)

Review-Url: https://codereview.chromium.org/2627933002 .
Cr-Commit-Position: refs/branch-heads/2924@{#729}
Cr-Branched-From: 3a87aecc31cd1ffe751dd72c04e5a96a1fc8108a-refs/heads/master@{#433059}
Committed: https://chromium.googlesource.com/chromium/src/+/4b51a93a49348dd8535737826dcef052d898cfbc

[bruthig, 2017-01-11 15:09:04]

Description was changed from

==========
Removing logic on showing/hiding separator

Since |logout_button_tray_| is moved to the left most position
in the status area widget, the logic on hiding separator of tray
in left of the |logout_button_tray_| is no longer needed because
there is no such tray. (confirmed with @sgabriel that
|logout_button_tray_| will always be the left most one).

Note that this is a partial revert of code added in
https://codereview.chromium.org/2147143002/.

BUG=657211

Review-Url: https://codereview.chromium.org/2582923002
Cr-Commit-Position: refs/heads/master@{#439398}
(cherry picked from commit 26f5083f295844743f7e7510ba5fba5680368057)
==========

to

==========
Removing logic on showing/hiding separator

Since |logout_button_tray_| is moved to the left most position
in the status area widget, the logic on hiding separator of tray
in left of the |logout_button_tray_| is no longer needed because
there is no such tray. (confirmed with @sgabriel that
|logout_button_tray_| will always be the left most one).

Note that this is a partial revert of code added in
https://codereview.chromium.org/2147143002/.

BUG=657211

Review-Url: https://codereview.chromium.org/2582923002
Cr-Commit-Position: refs/heads/master@{#439398}
(cherry picked from commit 26f5083f295844743f7e7510ba5fba5680368057)

Review-Url: https://codereview.chromium.org/2627933002 .
Cr-Commit-Position: refs/branch-heads/2924@{#729}
Cr-Branched-From:
3a87aecc31cd1ffe751dd72c04e5a96a1fc8108a-refs/heads/master@{#433059}
Committed:
https://chromium.googlesource.com/chromium/src/+/4b51a93a49348dd8535737826dce...
==========

[bruthig, 2017-01-11 15:09:06]

Committed patchset #1 (id:1) manually as
4b51a93a49348dd8535737826dcef052d898cfbc.