Remove path id from IV in QUIC encrytion algorithms.

net/quic/core/crypto/quic_crypto_client_config.cc

Index: net/quic/core/crypto/quic_crypto_client_config.cc
diff --git a/net/quic/core/crypto/quic_crypto_client_config.cc b/net/quic/core/crypto/quic_crypto_client_config.cc
index cc7232e64720a9904c61c8558ced684b510ce399..6835bed9c0144da37b355e4ce578c579c99e0f41 100644
--- a/net/quic/core/crypto/quic_crypto_client_config.cc
+++ b/net/quic/core/crypto/quic_crypto_client_config.cc
@@ -658,10 +658,9 @@ QuicErrorCode QuicCryptoClientConfig::FillClientHello(
     std::unique_ptr<char[]> output(new char[encrypted_len]);
     size_t output_size = 0;
     if (!crypters.encrypter->EncryptPacket(
-            preferred_version, kDefaultPathId /* path id */,
-            0 /* packet number */, StringPiece() /* associated data */,
-            cetv_plaintext.AsStringPiece(), output.get(), &output_size,
-            encrypted_len)) {
+            preferred_version, 0 /* packet number */,
+            StringPiece() /* associated data */, cetv_plaintext.AsStringPiece(),
+            output.get(), &output_size, encrypted_len)) {
       *error_details = "Packet encryption failed";
       return QUIC_ENCRYPTION_FAILURE;
     }