[Sync] Move attachments code out of core/.

components/sync/engine/attachments/in_memory_attachment_store.h

Index: components/sync/engine/attachments/in_memory_attachment_store.h
diff --git a/components/sync/core/attachments/in_memory_attachment_store.h b/components/sync/engine/attachments/in_memory_attachment_store.h
similarity index 89%
rename from components/sync/core/attachments/in_memory_attachment_store.h
rename to components/sync/engine/attachments/in_memory_attachment_store.h
index d16546ff55d5767f66917b41a23f8ab771b835f0..dc79ee0b7e2057540578c91c515c85d7f1ce56c6 100644
--- a/components/sync/core/attachments/in_memory_attachment_store.h
+++ b/components/sync/engine/attachments/in_memory_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_IN_MEMORY_ATTACHMENT_STORE_H_
-#define COMPONENTS_SYNC_CORE_ATTACHMENTS_IN_MEMORY_ATTACHMENT_STORE_H_
+#ifndef COMPONENTS_SYNC_ENGINE_ATTACHMENTS_IN_MEMORY_ATTACHMENT_STORE_H_
+#define COMPONENTS_SYNC_ENGINE_ATTACHMENTS_IN_MEMORY_ATTACHMENT_STORE_H_
 
 #include <map>
 #include <set>
@@ -14,7 +14,7 @@
 #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 base {
 class SequencedTaskRunner;
@@ -72,4 +72,4 @@ class InMemoryAttachmentStore : public AttachmentStoreBackend,
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_CORE_ATTACHMENTS_IN_MEMORY_ATTACHMENT_STORE_H_
+#endif  // COMPONENTS_SYNC_ENGINE_ATTACHMENTS_IN_MEMORY_ATTACHMENT_STORE_H_