Remove all remaining traces of MessageLoopProxy.

chrome/browser/sync_file_system/local/local_file_sync_context_unittest.cc

 // Copyright 2013 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/sync_file_system/local/local_file_sync_context.h"
 
 #include <stdint.h>
 #include <utility>
 #include <vector>
 
@@ skipping 55 matching lines @@
         file_error_(base::File::FILE_ERROR_FAILED),
         async_modify_finished_(false),
         has_inflight_prepare_for_sync_(false) {}
 
   void SetUp() override {
     RegisterSyncableFileSystem();
     ASSERT_TRUE(dir_.CreateUniqueTempDir());
     in_memory_env_.reset(leveldb::NewMemEnv(leveldb::Env::Default()));
 
     ui_task_runner_ = base::ThreadTaskRunnerHandle::Get();
-    io_task_runner_ = BrowserThread::GetMessageLoopProxyForThread(
-        BrowserThread::IO);
-    file_task_runner_ = BrowserThread::GetMessageLoopProxyForThread(
-        BrowserThread::IO);
+    io_task_runner_ = BrowserThread::GetTaskRunnerForThread(BrowserThread::IO);
+    file_task_runner_ =
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::IO);
   }
 
   void TearDown() override { RevokeSyncableFileSystem(); }
 
   void StartPrepareForSync(FileSystemContext* file_system_context,
                            const FileSystemURL& url,
                            LocalFileSyncContext::SyncMode sync_mode,
                            SyncFileMetadata* metadata,
                            FileChangeList* changes,
                            storage::ScopedFile* snapshot) {
@@ skipping 865 matching lines @@
 
   // Make sure kDir and kFile are created by ApplyRemoteChange.
   EXPECT_EQ(base::File::FILE_OK, file_system.FileExists(kFile));
   EXPECT_EQ(base::File::FILE_OK, file_system.DirectoryExists(kDir));
 
   sync_context_->ShutdownOnUIThread();
   file_system.TearDown();
 }
 
 }  // namespace sync_file_system