[Sync] Removing duplicate includes, part 2.

components/sync/core_impl/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 "components/sync/core/attachments/attachment_service_impl.h"
 
 #include <iterator>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
-#include "base/macros.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "components/sync/api/attachments/attachment.h"
 #include "components/sync/core/attachments/fake_attachment_downloader.h"
 #include "components/sync/core/attachments/fake_attachment_uploader.h"
 
 namespace syncer {
 
 // GetOrDownloadAttachments starts multiple parallel DownloadAttachment calls.
@@ skipping 297 matching lines @@
                                  weak_ptr_factory_.GetWeakPtr()));
   }
 }
 
 void AttachmentServiceImpl::SetTimerForTest(
     std::unique_ptr<base::Timer> timer) {
   upload_task_queue_->SetTimerForTest(std::move(timer));
 }
 
 }  // namespace syncer