Remove PathCloseFrame, QuicPathId, DefaultPathId and InvalidPathId.

net/BUILD.gn

 # Copyright (c) 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.
 
 import("//build/buildflag_header.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
@@ skipping 1181 matching lines @@
       "quic/core/frames/quic_blocked_frame.h",
       "quic/core/frames/quic_connection_close_frame.cc",
       "quic/core/frames/quic_connection_close_frame.h",
       "quic/core/frames/quic_frame.cc",
       "quic/core/frames/quic_frame.h",
       "quic/core/frames/quic_goaway_frame.cc",
       "quic/core/frames/quic_goaway_frame.h",
       "quic/core/frames/quic_mtu_discovery_frame.h",
       "quic/core/frames/quic_padding_frame.cc",
       "quic/core/frames/quic_padding_frame.h",
-      "quic/core/frames/quic_path_close_frame.cc",
-      "quic/core/frames/quic_path_close_frame.h",
       "quic/core/frames/quic_ping_frame.h",
       "quic/core/frames/quic_rst_stream_frame.cc",
       "quic/core/frames/quic_rst_stream_frame.h",
       "quic/core/frames/quic_stop_waiting_frame.cc",
       "quic/core/frames/quic_stop_waiting_frame.h",
       "quic/core/frames/quic_stream_frame.cc",
       "quic/core/frames/quic_stream_frame.h",
       "quic/core/frames/quic_window_update_frame.cc",
       "quic/core/frames/quic_window_update_frame.h",
       "quic/core/quic_ack_listener_interface.cc",
@@ skipping 4492 matching lines @@
       "tools/transport_security_state_generator/trie/trie_writer.cc",
       "tools/transport_security_state_generator/trie/trie_writer.h",
     ]
     deps = [
       "//base",
       "//crypto",
       "//third_party/boringssl",
     ]
   }
 }