Add embedder-specific headers to HTTP CONNECT tunnel request

net/net.gypi

 # Copyright 2014 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.
 
 # This file is shared between the regular GYP build, the NaCl GYP build, and
 # the GN build. For GN support, it must have no conditionals or anything like
 # that beyond the simple one-level-deep dictionary of values.
 {
   'variables': {
     # Subset of net source files that are compiled for NaCl (net_nacl target).
@@ skipping 612 matching lines @@
       'http/http_network_session.cc',
       'http/http_network_session.h',
       'http/http_network_session_peer.cc',
       'http/http_network_session_peer.h',
       'http/http_network_transaction.cc',
       'http/http_network_transaction.h',
       'http/http_proxy_client_socket.cc',
       'http/http_proxy_client_socket.h',
       'http/http_proxy_client_socket_pool.cc',
       'http/http_proxy_client_socket_pool.h',
+      'http/http_proxy_tunnel_delegate.h',
       'http/http_request_info.cc',
       'http/http_request_info.h',
       'http/http_response_body_drainer.cc',
       'http/http_response_body_drainer.h',
       'http/http_server_properties.cc',
       'http/http_server_properties.h',
       'http/http_server_properties_impl.cc',
       'http/http_server_properties_impl.h',
       'http/http_server_properties_manager.cc',
       'http/http_server_properties_manager.h',
@@ skipping 1091 matching lines @@
       'tools/quic/test_tools/quic_test_client.h',
       'tools/quic/test_tools/quic_test_utils.cc',
       'tools/quic/test_tools/quic_test_utils.h',
       'tools/quic/test_tools/server_thread.h',
       'tools/quic/test_tools/server_thread.cc',
       'tools/quic/test_tools/simple_client.h',
       'tools/quic/test_tools/simple_client.cc',
     ],
   }
 }