Remove path id from IV in QUIC encrytion algorithms.

net/quic/core/crypto/quic_crypto_client_config.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/core/crypto/quic_crypto_client_config.h"
 
 #include <algorithm>
 #include <memory>
 
 #include "base/metrics/histogram_macros.h"
@@ skipping 640 matching lines @@
       *error_details = "Symmetric key setup failed";
       return QUIC_CRYPTO_SYMMETRIC_KEY_SETUP_FAILED;
     }
 
     const QuicData& cetv_plaintext = cetv.GetSerialized();
     const size_t encrypted_len =
         crypters.encrypter->GetCiphertextSize(cetv_plaintext.length());
     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;
     }
 
     out->SetStringPiece(kCETV, StringPiece(output.get(), output_size));
     out->MarkDirty();
 
     out->set_minimum_size(orig_min_size);
   }
 
@@ skipping 303 matching lines @@
   }
 
   // Update canonical version to point at the "most recent" entry.
   canonical_server_map_[suffix_server_id] = server_id;
 
   server_state->InitializeFrom(*canonical_state);
   return true;
 }
 
 }  // namespace net