Update Status Area Paint Scheduling

ash/system/status_area_widget.cc

Index: ash/system/status_area_widget.cc
diff --git a/ash/system/status_area_widget.cc b/ash/system/status_area_widget.cc
index ac2cffbf3c7fc38f8dc5f0a3934fb144e4a4c914..7327a3f9bfea24def960f4f6c8b45c53d4af9ea3 100644
--- a/ash/system/status_area_widget.cc
+++ b/ash/system/status_area_widget.cc
@@ -117,6 +117,16 @@ bool StatusAreaWidget::IsMessageBubbleShown() const {
            web_notification_tray_->IsMessageCenterBubbleVisible()));
 }
 
+void StatusAreaWidget::ShelfDimChanged() {
+  web_notification_tray_->SchedulePaint();
+  system_tray_->SchedulePaint();
+#if defined(OS_CHROMEOS)
+  virtual_keyboard_tray_->SchedulePaint();
+  logout_button_tray_->SchedulePaint();
+#endif
+  overview_button_tray_->SchedulePaint();
+}
+
 void StatusAreaWidget::OnNativeWidgetActivationChanged(bool active) {
   Widget::OnNativeWidgetActivationChanged(active);
   if (active)