Switch to standard integer types in sync/.

sync/api/attachments/attachment_store_backend.h

 // Copyright 2015 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.
 
 #ifndef SYNC_API_ATTACHMENTS_ATTACHMENT_STORE_BACKEND_H_
 #define SYNC_API_ATTACHMENTS_ATTACHMENT_STORE_BACKEND_H_
 
 #include "base/callback.h"
+#include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "sync/api/attachments/attachment.h"
 #include "sync/api/attachments/attachment_id.h"
 #include "sync/api/attachments/attachment_store.h"
 #include "sync/base/sync_export.h"
 
 namespace base {
 class SequencedTaskRunner;
 }  // namespace base
 
@@ skipping 40 matching lines @@
 
  private:
   scoped_refptr<base::SequencedTaskRunner> callback_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(AttachmentStoreBackend);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_API_ATTACHMENTS_ATTACHMENT_STORE_BACKEND_H_