Revert of tabing inconsistencies between trays in status area

ash/system/web_notification/web_notification_tray.cc

Index: ash/system/web_notification/web_notification_tray.cc
diff --git a/ash/system/web_notification/web_notification_tray.cc b/ash/system/web_notification/web_notification_tray.cc
index 31aa489b542048498bc28525866e8f40535d1132..4125dd58ab073f10ac94867cd079f3a2472b322e 100644
--- a/ash/system/web_notification/web_notification_tray.cc
+++ b/ash/system/web_notification/web_notification_tray.cc
@@ -216,7 +216,6 @@ WebNotificationTray::WebNotificationTray(StatusAreaWidget* status_area_widget)
   button_->set_triggerable_event_flags(
       ui::EF_LEFT_MOUSE_BUTTON | ui::EF_RIGHT_MOUSE_BUTTON);
   tray_container()->AddChildView(button_);
-  button_->SetFocusBehavior(FocusBehavior::NEVER);
   SetContentsBackground();
   tray_container()->SetBorder(views::Border::NullBorder());
   message_center_tray_.reset(new message_center::MessageCenterTray(
@@ -506,8 +505,6 @@ void WebNotificationTray::UpdateTrayContent() {
   SetVisible(IsLoggedIn());
   Layout();
   SchedulePaint();
-  if (IsLoggedIn())
-    status_area_widget_->system_tray()->SetNextFocusableView(this);
 }
 
 void WebNotificationTray::ClickedOutsideBubble() {