Removing logic on showing/hiding separator

ash/common/system/status_area_widget.cc

Index: ash/common/system/status_area_widget.cc
diff --git a/ash/common/system/status_area_widget.cc b/ash/common/system/status_area_widget.cc
index aebebbafd7f0e95db3f0c5c8a7ff63ba0c5a60d2..f98a83b26b6b3daf0d848cd8e49b91906c15e5eb 100644
--- a/ash/common/system/status_area_widget.cc
+++ b/ash/common/system/status_area_widget.cc
@@ -146,29 +146,6 @@ void StatusAreaWidget::UpdateAfterLoginStatusChange(LoginStatus login_status) {
     overview_button_tray_->UpdateAfterLoginStatusChange(login_status);
 }
 
-void StatusAreaWidget::OnTrayVisibilityChanged(TrayBackgroundView* tray) {
-  if (!ash::MaterialDesignController::IsShelfMaterial())
-    return;
-
-  // No separator is required between |system_tray_| and |overview_button_tray_|
-  // and no separator is required for the right most tray item.
-  if (tray == overview_button_tray_ || tray == system_tray_) {
-    tray->SetSeparatorVisibility(false);
-    return;
-  }
-#if defined(OS_CHROMEOS)
-  // If |logout_button_tray_| is visible, check if |tray| is visible and to
-  // the left of |logout_button_tray_|. If it is the case, then no separator
-  // is required between |tray| and |logout_button_tray_|. If
-  // |logout_button_tray_| is not visible, then separator should always be
-  // visible.
-  tray->SetSeparatorVisibility(!IsNextVisibleTrayToLogout(tray) &&
-                               tray != logout_button_tray_);
-#else
-  tray->SetSeparatorVisibility(true);
-#endif
-}
-
 bool StatusAreaWidget::ShouldShowShelf() const {
   if ((system_tray_ && system_tray_->ShouldShowShelf()) ||
       (web_notification_tray_ &&
@@ -281,23 +258,6 @@ void StatusAreaWidget::AddImeMenuTray() {
   ime_menu_tray_ = new ImeMenuTray(wm_shelf_);
   status_area_widget_delegate_->AddTray(ime_menu_tray_);
 }
-
-bool StatusAreaWidget::IsNextVisibleTrayToLogout(
-    TrayBackgroundView* tray) const {
-  int logout_button_index =
-      status_area_widget_delegate_->GetIndexOf(logout_button_tray_);
-  // Logout button should always exist.
-  DCHECK_NE(-1, logout_button_index);
-  if (!logout_button_tray_->visible())
-    return false;
-
-  for (int c = logout_button_index + 1;
-       c < status_area_widget_delegate_->child_count(); c++) {
-    if (status_area_widget_delegate_->child_at(c)->visible())
-      return tray == status_area_widget_delegate_->child_at(c);
-  }
-  return false;
-}
 #endif
 
 void StatusAreaWidget::AddOverviewButtonTray() {