[Presentation API] Remove closed connections from PresentationConnectionList

content/renderer/presentation/presentation_dispatcher.cc

Index: content/renderer/presentation/presentation_dispatcher.cc
diff --git a/content/renderer/presentation/presentation_dispatcher.cc b/content/renderer/presentation/presentation_dispatcher.cc
index 2bb5bb076b71964707d2bf0e8d952519a5969cdf..5e43990d7a74e812e6d6a9eb929e7d00caeaa1e4 100644
--- a/content/renderer/presentation/presentation_dispatcher.cc
+++ b/content/renderer/presentation/presentation_dispatcher.cc
@@ -577,7 +577,9 @@ void PresentationDispatcher::OnReceiverConnectionAvailable(
       receiver_->OnReceiverConnectionAvailable(blink::WebPresentationInfo(
           presentation_info.presentation_url,
           blink::WebString::FromUTF8(presentation_info.presentation_id)));
-  auto* receiver_connection_proxy = new ReceiverConnectionProxy(connection);
+  auto* receiver_connection_proxy = new ReceiverConnectionProxy(
+      connection, base::Bind(&blink::WebPresentationReceiver::RemoveConnection,
+                             base::Unretained(receiver_), connection));
   connection->BindProxy(base::WrapUnique(receiver_connection_proxy));
 
   receiver_connection_proxy->Bind(std::move(receiver_connection_request));