Remove calls to deprecated MessageLoop methods on Windows and Linux.

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/single_thread_task_runner.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/worker_pool.h"
 #include "components/cronet/ios/version.h"
 #include "components/prefs/json_pref_store.h"
 #include "components/prefs/pref_filter.h"
 #include "net/base/net_errors.h"
 #include "net/base/network_change_notifier.h"
 #include "net/cert/cert_verify_result.h"
 #include "net/cert/ct_policy_enforcer.h"
 #include "net/cert/multi_log_ct_verifier.h"
@@ skipping 35 matching lines @@
 
 void CronetEnvironment::PostToNetworkThread(
     const tracked_objects::Location& from_here,
     const base::Closure& task) {
   network_io_thread_->task_runner()->PostTask(from_here, task);
 }
 
 void CronetEnvironment::PostToFileUserBlockingThread(
     const tracked_objects::Location& from_here,
     const base::Closure& task) {
-  file_user_blocking_thread_->message_loop()->PostTask(from_here, task);
+  file_user_blocking_thread_->task_runner()->PostTask(from_here, task);
 }
 
 net::URLRequestContext* CronetEnvironment::GetURLRequestContext() const {
   return main_context_.get();
 }
 
 // static
 void CronetEnvironment::Initialize() {
   // DCHECK_EQ([NSThread currentThread], [NSThread mainThread]);
   // This method must be called once from the main thread.
@@ skipping 256 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