Sample LOG network write errors.

PiperOrigin-RevId: 378257220

quic/qbone/qbone_packet_exchanger.cc

diff --git a/quic/qbone/qbone_packet_exchanger.cc b/quic/qbone/qbone_packet_exchanger.cc
index b87fde6..f8acb4f 100644
--- a/quic/qbone/qbone_packet_exchanger.cc
+++ b/quic/qbone/qbone_packet_exchanger.cc
@@ -33,8 +33,11 @@
     }
     if (blocked) {
       write_blocked_ = true;
-    } else if (visitor_) {
-      visitor_->OnWriteError(error);
+    } else {
+      QUIC_LOG_EVERY_N_SEC(ERROR, 60) << "Packet write failed: " << error;
+      if (visitor_) {
+        visitor_->OnWriteError(error);
+      }
     }
   }