[Sync] Move attachments code out of core/.

components/sync/engine/attachments/attachment_util.h

Index: components/sync/engine/attachments/attachment_util.h
diff --git a/components/sync/core/attachments/attachment_util.h b/components/sync/engine/attachments/attachment_util.h
similarity index 77%
rename from components/sync/core/attachments/attachment_util.h
rename to components/sync/engine/attachments/attachment_util.h
index cdf16ca9b540b0101706574642c8331777f5f557..3ecb053bbeed76948daf0fdde93a2a3d014306f7 100644
--- a/components/sync/core/attachments/attachment_util.h
+++ b/components/sync/engine/attachments/attachment_util.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_ATTACHMENT_UTIL_H_
-#define COMPONENTS_SYNC_CORE_ATTACHMENTS_ATTACHMENT_UTIL_H_
+#ifndef COMPONENTS_SYNC_ENGINE_ATTACHMENTS_ATTACHMENT_UTIL_H_
+#define COMPONENTS_SYNC_ENGINE_ATTACHMENTS_ATTACHMENT_UTIL_H_
 
 #include <stdint.h>
 
@@ -25,4 +25,4 @@ uint32_t ComputeCrc32c(const scoped_refptr<base::RefCountedMemory>& data);
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_CORE_ATTACHMENTS_ATTACHMENT_UTIL_H_
+#endif  // COMPONENTS_SYNC_ENGINE_ATTACHMENTS_ATTACHMENT_UTIL_H_