Remove all remaining traces of MessageLoopProxy.

chrome/browser/policy/chrome_browser_policy_connector.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 "chrome/browser/policy/chrome_browser_policy_connector.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 
@@ skipping 78 matching lines @@
   device_management_service->ScheduleInitialization(
       kServiceInitializationStartupDelay);
 
   InitInternal(local_state, std::move(device_management_service));
 }
 
 ConfigurationPolicyProvider*
     ChromeBrowserPolicyConnector::CreatePlatformProvider() {
 #if defined(OS_WIN)
   std::unique_ptr<AsyncPolicyLoader> loader(PolicyLoaderWin::Create(
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE),
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE),
       kRegistryChromePolicyKey));
   return new AsyncPolicyProvider(GetSchemaRegistry(), std::move(loader));
 #elif defined(OS_MACOSX)
   std::unique_ptr<AsyncPolicyLoader> loader(new PolicyLoaderMac(
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE),
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE),
       GetManagedPolicyPath(), new MacPreferences()));
   return new AsyncPolicyProvider(GetSchemaRegistry(), std::move(loader));
 #elif defined(OS_POSIX) && !defined(OS_ANDROID)
   base::FilePath config_dir_path;
   if (PathService::Get(chrome::DIR_POLICY_FILES, &config_dir_path)) {
     std::unique_ptr<AsyncPolicyLoader> loader(new ConfigDirPolicyLoader(
-        BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE),
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE),
         config_dir_path, POLICY_SCOPE_MACHINE));
     return new AsyncPolicyProvider(GetSchemaRegistry(), std::move(loader));
   } else {
     return NULL;
   }
 #elif defined(OS_ANDROID)
   return new policy::android::AndroidCombinedPolicyProvider(
       GetSchemaRegistry());
 #else
   return NULL;
 #endif
 }
 
 }  // namespace policy