[Sync] Move //components/sync to the syncer namespace, take 2.

components/sync/api/entity_change.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/api/entity_change.h"
 
-namespace syncer_v2 {
+namespace syncer {
 
 // static
 EntityChange EntityChange::CreateAdd(const std::string& storage_key,
                                      EntityDataPtr data) {
   return EntityChange(storage_key, ACTION_ADD, data);
 }
 
 // static
 EntityChange EntityChange::CreateUpdate(const std::string& storage_key,
                                         EntityDataPtr data) {
   return EntityChange(storage_key, ACTION_UPDATE, data);
 }
 
 // static
 EntityChange EntityChange::CreateDelete(const std::string& storage_key) {
   return EntityChange(storage_key, ACTION_DELETE, EntityDataPtr());
 }
 
 EntityChange::EntityChange(const std::string& storage_key,
                            ChangeType type,
                            EntityDataPtr data)
     : storage_key_(storage_key), type_(type), data_(data) {}
 
 EntityChange::EntityChange(const EntityChange& other) = default;
 
 EntityChange::~EntityChange() {}
 
-}  // namespace syncer_v2
+}  // namespace syncer