[Sync] Rename csync namespace to syncer

sync/protocol/proto_enum_conversions_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.
 
 // Keep this file in sync with the .proto files in this directory.
 
 #include "sync/protocol/proto_enum_conversions.h"
 
 #include <string>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
-namespace csync {
+namespace syncer {
 namespace {
 
 class ProtoEnumConversionsTest : public testing::Test {
 };
 
 template <class T>
 void TestEnumStringFunction(const char* (*enum_string_fn)(T),
                             int enum_min, int enum_max) {
   for (int i = enum_min; i <= enum_max; ++i) {
     const std::string& str = enum_string_fn(static_cast<T>(i));
@@ skipping 59 matching lines @@
 }
 
 TEST_F(ProtoEnumConversionsTest, GetActionString) {
   TestEnumStringFunction(
       GetActionString,
       sync_pb::SyncEnums::Action_MIN,
       sync_pb::SyncEnums::Action_MAX);
 }
 
 }  // namespace
-}  // namespace csync
+}  // namespace syncer