Remove path id from IV in QUIC encrytion algorithms.

net/quic/core/crypto/quic_crypto_server_config.cc

Index: net/quic/core/crypto/quic_crypto_server_config.cc
diff --git a/net/quic/core/crypto/quic_crypto_server_config.cc b/net/quic/core/crypto/quic_crypto_server_config.cc
index e4c0bca19f80f799797a32a1414451233cc683d9..43a752a7b0310ad6cb73bed45890924c9175ea29 100644
--- a/net/quic/core/crypto/quic_crypto_server_config.cc
+++ b/net/quic/core/crypto/quic_crypto_server_config.cc
@@ -895,7 +895,7 @@ void QuicCryptoServerConfig::ProcessClientHelloAfterGetProof(
     char plaintext[kMaxPacketSize];
     size_t plaintext_length = 0;
     const bool success = crypters.decrypter->DecryptPacket(
-        QUIC_VERSION_35, kDefaultPathId, 0 /* packet number */,
+        QUIC_VERSION_35, 0 /* packet number */,
         StringPiece() /* associated data */, cetv_ciphertext, plaintext,
         &plaintext_length, kMaxPacketSize);
     if (!success) {