Remove path id from IV in QUIC encrytion algorithms.

net/quic/core/crypto/quic_decrypter.h

Index: net/quic/core/crypto/quic_decrypter.h
diff --git a/net/quic/core/crypto/quic_decrypter.h b/net/quic/core/crypto/quic_decrypter.h
index 824cf929f3e26647948eb2574b09f91cc298f603..a47643ea8b7d503c5b7ce31d2e91cc9da11b6d2b 100644
--- a/net/quic/core/crypto/quic_decrypter.h
+++ b/net/quic/core/crypto/quic_decrypter.h
@@ -67,7 +67,6 @@ class QUIC_EXPORT_PRIVATE QuicDecrypter {
   // TODO(wtc): add a way for DecryptPacket to report decryption failure due
   // to non-authentic inputs, as opposed to other reasons for failure.
   virtual bool DecryptPacket(QuicVersion version,
-                             QuicPathId path_id,
                              QuicPacketNumber packet_number,
                              base::StringPiece associated_data,
                              base::StringPiece ciphertext,