[Sync] Move sync/{internal_api,syncable} into syncer namespace

sync/syncable/syncable_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 entry_kernel.h.
 
 #include "sync/syncable/syncable_enum_conversions.h"
 
 #include <string>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
+namespace syncer {
 namespace syncable {
 namespace {
 
 class SyncableEnumConversionsTest : public testing::Test {
 };
 
 template <class T>
 void TestEnumStringFunction(const char* (*enum_string_fn)(T),
                             int enum_min, int enum_max) {
   EXPECT_LE(enum_min, enum_max);
@@ skipping 53 matching lines @@
       GetProtoFieldString, PROTO_FIELDS_BEGIN, PROTO_FIELDS_END - 1);
 }
 
 TEST_F(SyncableEnumConversionsTest, GetBitTempString) {
   TestEnumStringFunction(
       GetBitTempString, BIT_TEMPS_BEGIN, BIT_TEMPS_END - 1);
 }
 
 }  // namespace
 }  // namespace syncable
+}  // namespace syncer