Remove all remaining traces of MessageLoopProxy.

chrome/browser/sync_file_system/local/local_file_sync_service.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_service.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/stl_util.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 327 matching lines @@
     return;
   origin_change_map_.SetOriginEnabled(origin, enabled);
 }
 
 LocalFileSyncService::LocalFileSyncService(Profile* profile,
                                            leveldb::Env* env_override)
     : profile_(profile),
       sync_context_(new LocalFileSyncContext(
           profile_->GetPath(),
           env_override,
-          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI).get(),
-          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO)
-              .get())),
+          BrowserThread::GetTaskRunnerForThread(BrowserThread::UI).get(),
+          BrowserThread::GetTaskRunnerForThread(BrowserThread::IO).get())),
       local_change_processor_(nullptr) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   sync_context_->AddOriginChangeObserver(this);
 }
 
 void LocalFileSyncService::DidInitializeFileSystemContext(
     const GURL& app_origin,
     storage::FileSystemContext* file_system_context,
     const SyncStatusCallback& callback,
     SyncStatusCode status) {
@@ skipping 129 matching lines @@
 
 LocalChangeProcessor* LocalFileSyncService::GetLocalChangeProcessor(
     const FileSystemURL& url) {
   if (!get_local_change_processor_.is_null())
     return get_local_change_processor_.Run(url.origin());
   DCHECK(local_change_processor_);
   return local_change_processor_;
 }
 
 }  // namespace sync_file_system