[Sync] Rename csync namespace to syncer

sync/internal_api/public/engine/model_safe_worker_unittest.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/internal_api/public/engine/model_safe_worker.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-namespace csync {
+namespace syncer {
 namespace {
 
 class ModelSafeWorkerTest : public ::testing::Test {
 };
 
 TEST_F(ModelSafeWorkerTest, ModelSafeRoutingInfoToValue) {
   ModelSafeRoutingInfo routing_info;
   routing_info[syncable::BOOKMARKS] = GROUP_PASSIVE;
   routing_info[syncable::NIGORI] = GROUP_UI;
   routing_info[syncable::PREFERENCES] = GROUP_DB;
@@ skipping 23 matching lines @@
   routing_info[syncable::NIGORI] = GROUP_UI;
   routing_info[syncable::PREFERENCES] = GROUP_DB;
   const syncable::ModelTypeSet expected_types(
       syncable::BOOKMARKS,
       syncable::NIGORI,
       syncable::PREFERENCES);
   EXPECT_TRUE(GetRoutingInfoTypes(routing_info).Equals(expected_types));
 }
 
 }  // namespace
-}  // namespace csync
+}  // namespace syncer