Remove use of deprecated MessageLoop methods in sync.

sync/internal_api/attachments/attachment_downloader_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_downloader_impl.h"
 
 #include <stdint.h>
 #include <utility>
 
 #include "base/base64.h"
 #include "base/bind.h"
-#include "base/message_loop/message_loop.h"
+#include "base/location.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
+#include "base/single_thread_task_runner.h"
 #include "base/sys_byteorder.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_status_code.h"
 #include "net/http/http_util.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_status.h"
 #include "sync/internal_api/public/attachments/attachment_uploader_impl.h"
 #include "sync/internal_api/public/attachments/attachment_util.h"
 #include "sync/protocol/sync.pb.h"
@@ skipping 212 matching lines @@
   std::vector<DownloadCallback>::const_iterator iter;
   for (iter = download_state.user_callbacks.begin();
        iter != download_state.user_callbacks.end();
        ++iter) {
     std::unique_ptr<Attachment> attachment;
     if (result == DOWNLOAD_SUCCESS) {
       attachment.reset(new Attachment(Attachment::CreateFromParts(
           download_state.attachment_id, attachment_data)));
     }
 
-    base::MessageLoop::current()->PostTask(
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::Bind(*iter, result, base::Passed(&attachment)));
   }
 }
 
 bool AttachmentDownloaderImpl::ExtractCrc32c(
     const net::HttpResponseHeaders* headers,
     uint32_t* crc32c) {
   DCHECK(crc32c);
   if (!headers) {
     return false;
@@ skipping 25 matching lines @@
 
   if (crc32c_raw.size() != sizeof(*crc32c))
     return false;
 
   *crc32c =
       base::NetToHost32(*reinterpret_cast<const uint32_t*>(crc32c_raw.c_str()));
   return true;
 }
 
 }  // namespace syncer