Make HttpNetworkSession::host_mapping_rules no longer a pointer.

net/http/http_stream_factory_impl.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/http/http_stream_factory_impl.h"
 
 #include <string>
 #include <tuple>
 
 #include "base/logging.h"
@@ skipping 201 matching lines @@
       /* is_preconnect = */ true,
       /* enable_ip_based_pooling = */ true,
       /* enable_alternative_services = */ true);
   JobController* job_controller_raw_ptr = job_controller.get();
   job_controller_set_.insert(std::move(job_controller));
   job_controller_raw_ptr->Preconnect(num_streams, request_info,
                                      server_ssl_config, proxy_ssl_config);
 }
 
 const HostMappingRules* HttpStreamFactoryImpl::GetHostMappingRules() const {
-  return session_->params().host_mapping_rules;
+  return &session_->params().host_mapping_rules;
 }
 
 void HttpStreamFactoryImpl::OnNewSpdySessionReady(
     const base::WeakPtr<SpdySession>& spdy_session,
     bool direct,
     const SSLConfig& used_ssl_config,
     const ProxyInfo& used_proxy_info,
     bool was_alpn_negotiated,
     NextProto negotiated_protocol,
     bool using_spdy,
@@ skipping 219 matching lines @@
   factory_dump->AddScalar("main_job_count",
                           base::trace_event::MemoryAllocatorDump::kUnitsObjects,
                           main_job_count);
   // The number of preconnect controllers.
   factory_dump->AddScalar("preconnect_count",
                           base::trace_event::MemoryAllocatorDump::kUnitsObjects,
                           num_controllers_for_preconnect);
 }
 
 }  // namespace net