[Sync] Move attachments code out of core/.

components/sync/engine/attachments/on_disk_attachment_store.h

Index: components/sync/engine/attachments/on_disk_attachment_store.h
diff --git a/components/sync/core/attachments/on_disk_attachment_store.h b/components/sync/engine/attachments/on_disk_attachment_store.h
similarity index 93%
rename from components/sync/core/attachments/on_disk_attachment_store.h
rename to components/sync/engine/attachments/on_disk_attachment_store.h
index 87e66f5d9e4f5f3dda0d1b0f3bef5e83471387e2..cf6c0623bc4571d52f753620cf72a31512bb5089 100644
--- a/components/sync/core/attachments/on_disk_attachment_store.h
+++ b/components/sync/engine/attachments/on_disk_attachment_store.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_SYNC_CORE_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_
-#define COMPONENTS_SYNC_CORE_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_
+#ifndef COMPONENTS_SYNC_ENGINE_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_
+#define COMPONENTS_SYNC_ENGINE_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_
 
 #include <memory>
 #include <string>
@@ -15,7 +15,7 @@
 #include "components/sync/api/attachments/attachment.h"
 #include "components/sync/api/attachments/attachment_id.h"
 #include "components/sync/api/attachments/attachment_store.h"
-#include "components/sync/api/attachments/attachment_store_backend.h"
+#include "components/sync/engine/attachments/attachment_store_backend.h"
 
 namespace attachment_store_pb {
 class RecordMetadata;
@@ -104,4 +104,4 @@ class OnDiskAttachmentStore : public AttachmentStoreBackend,
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_CORE_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_
+#endif  // COMPONENTS_SYNC_ENGINE_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_