Revert of [Sync] Move //components/sync to the syncer namespace. (patchset #5 id:40001 of https://co

components/sync/core/simple_metadata_change_list.cc

 // 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.
 
 #include "components/sync/core/simple_metadata_change_list.h"
 
-namespace syncer {
+namespace syncer_v2 {
 
 SimpleMetadataChangeList::SimpleMetadataChangeList() {}
 
 SimpleMetadataChangeList::~SimpleMetadataChangeList() {}
 
 void SimpleMetadataChangeList::UpdateDataTypeState(
     const sync_pb::DataTypeState& data_type_state) {
   state_change_.reset(new DataTypeStateChange{UPDATE, data_type_state});
 }
 
@@ skipping 51 matching lines @@
                                    state_change_->state.SerializeAsString());
         break;
       case CLEAR:
         store->DeleteGlobalMetadata(write_batch);
         break;
     }
     state_change_.reset();
   }
 }
 
-}  // namespace syncer
+}  // namespace syncer_v2