Add UpdateNotificationSize to MessageCenterController.

ui/message_center/views/message_center_view.cc

Index: ui/message_center/views/message_center_view.cc
diff --git a/ui/message_center/views/message_center_view.cc b/ui/message_center/views/message_center_view.cc
index 321c9052db5b3e69dde7a439718cc7068bd04be1..60cce9d757bab5c6d3eff133f9273ee054356836 100644
--- a/ui/message_center/views/message_center_view.cc
+++ b/ui/message_center/views/message_center_view.cc
@@ -447,6 +447,11 @@ void MessageCenterView::ClickOnSettingsButton(
   message_center_->ClickOnSettingsButton(notification_id);
 }
 
+void MessageCenterView::UpdateNotificationSize(
+    const std::string& notification_id) {
+  OnNotificationUpdated(notification_id);
+}
+
 void MessageCenterView::AnimationEnded(const gfx::Animation* animation) {
   DCHECK_EQ(animation, settings_transition_animation_.get());