Revert of Remove reference counting from HttpNetworkSession.

ios/web/shell/shell_url_request_context_getter.cc

 // 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 "base/base_paths.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/path_service.h"
@@ skipping 117 matching lines @@
         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"));
     net::HttpCache::DefaultBackend* main_backend =
         new net::HttpCache::DefaultBackend(net::DISK_CACHE,
                                            net::CACHE_BACKEND_DEFAULT,
                                            cache_path, 0, cache_task_runner_);
 
-    storage_->set_http_network_session(
-        make_scoped_ptr(new net::HttpNetworkSession(network_session_params)));
     net::HttpCache* main_cache =
-        new net::HttpCache(storage_->http_network_session(), main_backend,
-                           true /* set_up_quic_server_info */);
+        new net::HttpCache(network_session_params, main_backend);
     storage_->set_http_transaction_factory(main_cache);
 
     scoped_ptr<net::URLRequestJobFactoryImpl> job_factory(
         new net::URLRequestJobFactoryImpl());
     bool set_protocol = job_factory->SetProtocolHandler(
         "data", make_scoped_ptr(new net::DataProtocolHandler));
     DCHECK(set_protocol);
 
     storage_->set_job_factory(job_factory.release());
   }
 
   return url_request_context_.get();
 }
 
 scoped_refptr<base::SingleThreadTaskRunner>
 ShellURLRequestContextGetter::GetNetworkTaskRunner() const {
   return network_task_runner_;
 }
 
 }  // namespace web