Invokes NotificationDelegate::Close in message center.

ui/message_center/message_center_impl.cc

Index: ui/message_center/message_center_impl.cc
diff --git a/ui/message_center/message_center_impl.cc b/ui/message_center/message_center_impl.cc
index 9d733272edb8a0ba1b89353789ea2ad92bfa0e93..c1d0179dc00c49eb5727b3ac50c4508808bb3c86 100644
--- a/ui/message_center/message_center_impl.cc
+++ b/ui/message_center/message_center_impl.cc
@@ -313,6 +313,11 @@ void MessageCenterImpl::RemoveNotification(const std::string& id,
   if (!HasNotification(id))
     return;
 
+  NotificationDelegate* delegate =
+      notification_list_->GetNotificationDelegate(id);
+  if (delegate)
+    delegate->Close(by_user);
+
   // In many cases |id| is a reference to an existing notification instance
   // but the instance can be destructed in RemoveNotification(). Hence
   // copies the id explicitly here.