[Sync] Move attachments code out of core/.

components/sync/core_impl/attachments/attachment_util.cc

Index: components/sync/core_impl/attachments/attachment_util.cc
diff --git a/components/sync/core_impl/attachments/attachment_util.cc b/components/sync/core_impl/attachments/attachment_util.cc
deleted file mode 100644
index d81b07e4c3f24e9c481b5039b7c4f9018455116f..0000000000000000000000000000000000000000
--- a/components/sync/core_impl/attachments/attachment_util.cc
+++ /dev/null
@@ -1,16 +0,0 @@
-// 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_util.h"
-
-#include "base/memory/ref_counted_memory.h"
-#include "third_party/leveldatabase/src/util/crc32c.h"
-
-namespace syncer {
-
-uint32_t ComputeCrc32c(const scoped_refptr<base::RefCountedMemory>& data) {
-  return leveldb::crc32c::Value(data->front_as<char>(), data->size());
-}
-
-}  // namespace syncer