[Sync] Move //components/sync to the syncer namespace.

components/sync/core/model_type_store_backend.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_CORE_MODEL_TYPE_STORE_BACKEND_H_
 #define COMPONENTS_SYNC_CORE_MODEL_TYPE_STORE_BACKEND_H_
 
 #include <memory>
 #include <string>
 #include <unordered_map>
 
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/threading/thread_collision_warner.h"
 #include "components/sync/api/model_type_store.h"
 
 namespace leveldb {
 class DB;
 class Env;
 class WriteBatch;
 }  // namespace leveldb
 
-namespace syncer_v2 {
+namespace syncer {
 
 // ModelTypeStoreBackend handles operations with leveldb. It is oblivious of the
 // fact that it is called from separate thread (with the exception of ctor),
 // meaning it shouldn't deal with callbacks and task_runners.
 class ModelTypeStoreBackend
     : public base::RefCountedThreadSafe<ModelTypeStoreBackend> {
  public:
   typedef std::unordered_map<std::string, ModelTypeStoreBackend*> BackendMap;
 
   // Helper function to create in memory environment for leveldb.
@@ skipping 62 matching lines @@
   // with in-memory or faulty environment.
   ModelTypeStore::Result Init(const std::string& path,
                               std::unique_ptr<leveldb::Env> env);
 
   // Macro wrapped mutex to guard against concurrent calls in debug builds.
   DFAKE_MUTEX(push_pop_);
 
   DISALLOW_COPY_AND_ASSIGN(ModelTypeStoreBackend);
 };
 
-}  // namespace syncer_v2
+}  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_CORE_MODEL_TYPE_STORE_BACKEND_H_