[Sync] Put everything in sync/api into csync namespace

sync/api/sync_data.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/sync_data.h"
 
 #include <ostream>
 
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string_number_conversions.h"
 #include "base/values.h"
 #include "sync/internal_api/public/base_node.h"
 #include "sync/internal_api/public/syncable/model_type.h"
 #include "sync/protocol/proto_value_conversions.h"
 #include "sync/protocol/sync.pb.h"
 
+namespace csync {
+
 void SyncData::ImmutableSyncEntityTraits::InitializeWrapper(
     Wrapper* wrapper) {
   *wrapper = new sync_pb::SyncEntity();
 }
 
 void SyncData::ImmutableSyncEntityTraits::DestroyWrapper(
     Wrapper* wrapper) {
   delete *wrapper;
 }
 
@@ skipping 103 matching lines @@
   }
 
   std::string id = base::Int64ToString(GetRemoteId());
   return "{ isLocal: false, type: " + type + ", specifics: " + specifics +
       ", id: " + id + "}";
 }
 
 void PrintTo(const SyncData& sync_data, std::ostream* os) {
   *os << sync_data.ToString();
 }
+
+}  // namespace csync