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 208187b9972a67c591f93046e8c98e7aa87d3065..ff40d760bc8929fcae4cf33fe1eef9806f8eab45 100644
--- a/ash/system/web_notification/web_notification_tray.cc
+++ b/ash/system/web_notification/web_notification_tray.cc
@@ -214,6 +214,7 @@ 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(
@@ -504,6 +505,8 @@ void WebNotificationTray::UpdateTrayContent() {
   SetVisible(IsLoggedIn());
   Layout();
   SchedulePaint();
+  if (IsLoggedIn())
+    status_area_widget()->system_tray()->SetNextFocusableView(this);
 }
 
 void WebNotificationTray::ClickedOutsideBubble() {