[Sync] Rename csync namespace to syncer

sync/api/fake_syncable_service.cc

 // Copyright (c) 2012 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 "sync/api/fake_syncable_service.h"
 
 #include "base/location.h"
 #include "sync/api/sync_error_factory.h"
 
-namespace csync {
+namespace syncer {
 
 FakeSyncableService::FakeSyncableService()
     : syncing_(false),
       type_(syncable::UNSPECIFIED) {}
 
 FakeSyncableService::~FakeSyncableService() {}
 
 void FakeSyncableService::set_merge_data_and_start_syncing_error(
     const SyncError& error) {
   merge_data_and_start_syncing_error_ = error;
@@ skipping 31 matching lines @@
     syncable::ModelType type) const {
   return SyncDataList();
 }
 
 SyncError FakeSyncableService::ProcessSyncChanges(
     const tracked_objects::Location& from_here,
     const SyncChangeList& change_list) {
   return process_sync_changes_error_;
 }
 
-}  // namespace csync
+}  // namespace syncer