Remove PathCloseFrame, QuicPathId, DefaultPathId and InvalidPathId.

net/quic/core/quic_connection_test.cc

 // Copyright (c) 2012 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/quic_connection.h"
 
 #include <errno.h>
 #include <memory>
 #include <ostream>
 #include <utility>
@@ skipping 911 matching lines @@
                                          QuicStopWaitingFrame* frame,
                                          EncryptionLevel level) {
     return ProcessFramePacketAtLevel(number, QuicFrame(frame),
                                      ENCRYPTION_INITIAL);
   }
 
   void ProcessGoAwayPacket(QuicGoAwayFrame* frame) {
     ProcessFramePacket(QuicFrame(frame));
   }
 
-  void ProcessPathClosePacket(QuicPathCloseFrame* frame) {
-    ProcessFramePacket(QuicFrame(frame));
-  }
-
   bool IsMissing(QuicPacketNumber number) {
     return IsAwaitingPacket(*outgoing_ack(), number, 0);
   }
 
   QuicPacket* ConstructPacket(QuicPacketHeader header, QuicFrames frames) {
     QuicPacket* packet = BuildUnsizedDataPacket(&peer_framer_, header, frames);
     EXPECT_NE(nullptr, packet);
     return packet;
   }
 
@@ skipping 4188 matching lines @@
                             error_details, ConnectionCloseSource::FROM_PEER));
   connection_.set_perspective(Perspective::IS_CLIENT);
   connection_.CloseConnection(QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT,
                               error_details,
                               ConnectionCloseBehavior::SILENT_CLOSE);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net