Explicitly initialize ecn_codepoint in the ReceivedPacketInfo constructor.

PiperOrigin-RevId: 501911452
diff --git a/quiche/quic/core/quic_connection_test.cc b/quiche/quic/core/quic_connection_test.cc
index 98027d4..8fb5f78 100644
--- a/quiche/quic/core/quic_connection_test.cc
+++ b/quiche/quic/core/quic_connection_test.cc
@@ -16708,6 +16708,10 @@
             connection_.SupportsMultiplePacketNumberSpaces() ? 1 : 2);
 }
 
+TEST_P(QuicConnectionTest, ReceivedPacketInfoDefaults) {
+  EXPECT_TRUE(QuicConnectionPeer::TestLastReceivedPacketInfoDefaults());
+}
+
 }  // namespace
 }  // namespace test
 }  // namespace quic