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

components/sync/core/model_type_store_backend.cc

Index: components/sync/core/model_type_store_backend.cc
diff --git a/components/sync/core/model_type_store_backend.cc b/components/sync/core/model_type_store_backend.cc
index 89f62d2b8f2d2a793422ade229199872380719c7..11d3b88450f6f45a36775ed4549cc6acaf885423 100644
--- a/components/sync/core/model_type_store_backend.cc
+++ b/components/sync/core/model_type_store_backend.cc
@@ -18,7 +18,7 @@
 #include "third_party/leveldatabase/src/include/leveldb/status.h"
 #include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
 
-namespace syncer {
+namespace syncer_v2 {
 
 // static
 base::LazyInstance<ModelTypeStoreBackend::BackendMap>
@@ -142,4 +142,4 @@ ModelTypeStore::Result ModelTypeStoreBackend::WriteModifications(
                      : ModelTypeStore::Result::UNSPECIFIED_ERROR;
 }
 
-}  // namespace syncer
+}  // namespace syncer_v2