Split HttpNetworkSession::Params into two structs.

ios/chrome/browser/browser_state/chrome_browser_state_impl_io_data.mm

 // Copyright 2015 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/chrome/browser/browser_state/chrome_browser_state_impl_io_data.h"
 
 #include <memory>
 #include <set>
 #include <utility>
 
@@ skipping 287 matching lines @@
     net::URLRequestContext* main_context) const {
   // Copy most state from the main context.
   AppRequestContext* context = new AppRequestContext();
   context->CopyFrom(main_context);
 
   // Use a separate ChannelIDService.
   std::unique_ptr<net::ChannelIDService> channel_id_service(
       new net::ChannelIDService(new net::DefaultChannelIDStore(nullptr)));
 
   // Build a new HttpNetworkSession that uses the new ChannelIDService.
-  net::HttpNetworkSession::Params network_params =
-      http_network_session_->params();
-  network_params.channel_id_service = channel_id_service.get();
+  net::HttpNetworkSession::Context session_context =
+      http_network_session_->context();
+  session_context.channel_id_service = channel_id_service.get();
   std::unique_ptr<net::HttpNetworkSession> http_network_session(
-      new net::HttpNetworkSession(network_params));
+      new net::HttpNetworkSession(http_network_session_->params(),
+                                  session_context));
 
   // Use a separate HTTP disk cache for isolated apps.
   std::unique_ptr<net::HttpCache::BackendFactory> app_backend =
       net::HttpCache::DefaultBackend::InMemory(0);
   std::unique_ptr<net::HttpCache> app_http_cache =
       CreateHttpFactory(http_network_session.get(), std::move(app_backend));
 
   cookie_util::CookieStoreConfig ios_cookie_config(
       base::FilePath(),
       cookie_util::CookieStoreConfig::EPHEMERAL_SESSION_COOKIES,
@@ skipping 33 matching lines @@
     const base::Closure& completion) {
   DCHECK_CURRENTLY_ON(web::WebThread::IO);
   DCHECK(initialized());
 
   DCHECK(transport_security_state());
   // Completes synchronously.
   transport_security_state()->DeleteAllDynamicDataSince(time);
   DCHECK(http_server_properties_manager_);
   http_server_properties_manager_->Clear(completion);
 }