Remove use of deprecated MessageLoop methods in sync.

sync/internal_api/attachments/attachment_service_impl.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 "sync/internal_api/public/attachments/attachment_service_impl.h"
 
 #include <iterator>
 #include <utility>
 
 #include "base/bind.h"
+#include "base/location.h"
 #include "base/macros.h"
-#include "base/message_loop/message_loop.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "sync/api/attachments/attachment.h"
 #include "sync/internal_api/public/attachments/fake_attachment_downloader.h"
 #include "sync/internal_api/public/attachments/fake_attachment_uploader.h"
 
 namespace syncer {
 
 // GetOrDownloadAttachments starts multiple parallel DownloadAttachment calls.
 // GetOrDownloadState tracks completion of these calls and posts callback for
@@ skipping 75 matching lines @@
   in_progress_attachments_.erase(attachment_id);
   PostResultIfAllRequestsCompleted();
 }
 
 void
 AttachmentServiceImpl::GetOrDownloadState::PostResultIfAllRequestsCompleted() {
   if (in_progress_attachments_.empty()) {
     // All requests completed. Let's notify consumer.
     GetOrDownloadResult result =
         unavailable_attachments_.empty() ? GET_SUCCESS : GET_UNSPECIFIED_ERROR;
-    base::MessageLoop::current()->PostTask(
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE,
         base::Bind(callback_, result, base::Passed(&retrieved_attachments_)));
   }
 }
 
 AttachmentServiceImpl::AttachmentServiceImpl(
     std::unique_ptr<AttachmentStoreForSync> attachment_store,
     std::unique_ptr<AttachmentUploader> attachment_uploader,
     std::unique_ptr<AttachmentDownloader> attachment_downloader,
     Delegate* delegate,
@@ skipping 208 matching lines @@
                    weak_ptr_factory_.GetWeakPtr()));
   }
 }
 
 void AttachmentServiceImpl::SetTimerForTest(
     std::unique_ptr<base::Timer> timer) {
   upload_task_queue_->SetTimerForTest(std::move(timer));
 }
 
 }  // namespace syncer