Remove all remaining traces of MessageLoopProxy.

components/drive/file_system_unittest.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 "components/drive/chromeos/file_system.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 130 matching lines @@
         fake_free_disk_space_getter_.get()));
     ASSERT_TRUE(cache_->Initialize());
 
     resource_metadata_.reset(new internal::ResourceMetadata(
         metadata_storage_.get(), cache_.get(),
         base::ThreadTaskRunnerHandle::Get()));
     ASSERT_EQ(FILE_ERROR_OK, resource_metadata_->Initialize());
 
     const base::FilePath temp_file_dir = temp_dir_.path().AppendASCII("tmp");
     ASSERT_TRUE(base::CreateDirectory(temp_file_dir));
-    file_task_runner_ = content::BrowserThread::GetMessageLoopProxyForThread(
+    file_task_runner_ = content::BrowserThread::GetTaskRunnerForThread(
         content::BrowserThread::FILE);
     file_system_.reset(new FileSystem(
         pref_service_.get(), logger_.get(), cache_.get(), scheduler_.get(),
         resource_metadata_.get(), base::ThreadTaskRunnerHandle::Get().get(),
         file_task_runner_.get(), temp_file_dir));
     file_system_->AddObserver(mock_directory_observer_.get());
 
     // Disable delaying so that the sync starts immediately.
     file_system_->sync_client_for_testing()->set_delay_for_testing(
         base::TimeDelta::FromSeconds(0));
@@ skipping 902 matching lines @@
       google_apis::test_util::CreateCopyResultCallback(&available));
   content::RunAllBlockingPoolTasksUntilIdle();
   ASSERT_FALSE(available);
 
   entry = GetResourceEntrySync(file_in_root);
   ASSERT_TRUE(entry);
   EXPECT_FALSE(entry->file_specific_info().cache_state().is_present());
 }
 
 }   // namespace drive