diff --git a/net/socket/udp_socket_starboard.cc b/net/socket/udp_socket_starboard.cc
index 1bfd609bcc0b..8cd75fc5de9e 100644
--- a/net/socket/udp_socket_starboard.cc
+++ b/net/socket/udp_socket_starboard.cc
@@ -115,12 +115,16 @@ int UDPSocketStarboard::AdoptOpenedSocket(AddressFamily address_family,
 }
 
 void UDPSocketStarboard::Close() {
+  DLOG(INFO) << __FUNCTION__ << "Mark begin";
   DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
+  DLOG(INFO) << __FUNCTION__ << "Mark 1";
 
   owned_socket_count_.Reset();
+  DLOG(INFO) << __FUNCTION__ << "Mark 2";
 
   if (socket_ == kSbSocketInvalid)
     return;
+  DLOG(INFO) << __FUNCTION__ << "Mark 3";
 
   // Zero out any pending read/write callback state.
   read_buf_ = NULL;
@@ -132,16 +136,21 @@ void UDPSocketStarboard::Close() {
   write_callback_.Reset();
   send_to_address_.reset();
 
+  DLOG(INFO) << __FUNCTION__ << "Mark 4";
   bool ok = socket_watcher_.UnregisterInterest(kSbSocketWaiterInterestRead |
                                                kSbSocketWaiterInterestWrite);
+  DLOG(INFO) << __FUNCTION__ << "Mark 5";
   DCHECK(ok);
 
+  DLOG(INFO) << __FUNCTION__ << "Mark 6";
   is_connected_ = false;
   if (!SbSocketDestroy(socket_)) {
     DPLOG(ERROR) << "SbSocketDestroy";
   }
+  DLOG(INFO) << __FUNCTION__ << "Mark 7";
 
   socket_ = kSbSocketInvalid;
+  DLOG(INFO) << __FUNCTION__ << "Mark end";
 }
 
 int UDPSocketStarboard::GetPeerAddress(IPEndPoint* address) const {