Fixes in CrNet and Cronet frameworks

components/cronet/ios/cronet_environment.cc

 // Copyright 2016 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 "components/cronet/ios/cronet_environment.h"
 
 #include <utility>
 
 #include "base/at_exit.h"
 #include "base/atomicops.h"
 #include "base/command_line.h"
+#include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
 #include "base/json/json_writer.h"
 #include "base/mac/bind_objc_block.h"
 #include "base/mac/foundation_util.h"
 #include "base/macros.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/path_service.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 205 matching lines @@
 
 CronetEnvironment::~CronetEnvironment() {
 // net::HTTPProtocolHandlerDelegate::SetInstance(nullptr);
 #if defined(USE_NSS_CERTS)
   net::SetURLRequestContextForNSSHttpIO(nullptr);
 #endif
 }
 
 void CronetEnvironment::InitializeOnNetworkThread() {
   DCHECK(network_io_thread_->task_runner()->BelongsToCurrentThread());
+  base::FeatureList::InitializeInstance(std::string(), std::string());
   // TODO(mef): Use net:UrlRequestContextBuilder instead of manual build.
   main_context_.reset(new net::URLRequestContext);
   main_context_->set_net_log(net_log_.get());
   std::string user_agent(user_agent_product_name_ +
                          " (iOS); Cronet/" CRONET_VERSION);
   main_context_->set_http_user_agent_settings(
       new net::StaticHttpUserAgentSettings("en", user_agent));
 
   main_context_->set_ssl_config_service(new net::SSLConfigServiceDefaults);
   main_context_->set_transport_security_state(
@@ skipping 95 matching lines @@
   const net::HttpUserAgentSettings* user_agent_settings =
       main_context_->http_user_agent_settings();
   if (!user_agent_settings) {
     return nullptr;
   }
 
   return user_agent_settings->GetUserAgent();
 }
 
 }  // namespace cronet