Remove NetworkDelegate from HttpNetworkSession.

ios/web/shell/shell_url_request_context_getter.mm

 // 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.
 
 #include "ios/web/shell/shell_url_request_context_getter.h"
 
 #include <utility>
 
 #include "base/base_paths.h"
 #include "base/logging.h"
@@ skipping 106 matching lines @@
         url_request_context_->transport_security_state();
     network_session_params.channel_id_service =
         url_request_context_->channel_id_service();
     network_session_params.net_log = url_request_context_->net_log();
     network_session_params.proxy_service =
         url_request_context_->proxy_service();
     network_session_params.ssl_config_service =
         url_request_context_->ssl_config_service();
     network_session_params.http_auth_handler_factory =
         url_request_context_->http_auth_handler_factory();
-    network_session_params.network_delegate = network_delegate_.get();
     network_session_params.http_server_properties =
         url_request_context_->http_server_properties();
     network_session_params.host_resolver =
         url_request_context_->host_resolver();
 
     base::FilePath cache_path = base_path_.Append(FILE_PATH_LITERAL("Cache"));
     scoped_ptr<net::HttpCache::DefaultBackend> main_backend(
         new net::HttpCache::DefaultBackend(net::DISK_CACHE,
                                            net::CACHE_BACKEND_DEFAULT,
                                            cache_path, 0, cache_task_runner_));
@@ skipping 15 matching lines @@
 
   return url_request_context_.get();
 }
 
 scoped_refptr<base::SingleThreadTaskRunner>
 ShellURLRequestContextGetter::GetNetworkTaskRunner() const {
   return network_task_runner_;
 }
 
 }  // namespace web