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

sync/api/syncable_service.h

 // 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.
 
 #ifndef SYNC_API_SYNCABLE_SERVICE_H_
 #define SYNC_API_SYNCABLE_SERVICE_H_
 #pragma once
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "sync/api/sync_change_processor.h"
 #include "sync/api/sync_data.h"
 #include "sync/api/sync_error.h"
 #include "sync/internal_api/public/syncable/model_type.h"
 
+namespace csync {
+
 class SyncErrorFactory;
 
 typedef std::vector<SyncData> SyncDataList;
 
 // TODO(zea): remove SupportsWeakPtr in favor of having all SyncableService
 // implementers provide a way of getting a weak pointer to themselves.
 // See crbug.com/100114.
 class SyncableService : public SyncChangeProcessor,
                         public base::SupportsWeakPtr<SyncableService> {
  public:
@@ skipping 26 matching lines @@
   //          encountered, and a filled SyncError (IsSet() == true)
   //          otherwise.
   virtual SyncError ProcessSyncChanges(
       const tracked_objects::Location& from_here,
       const SyncChangeList& change_list) OVERRIDE = 0;
 
  protected:
   virtual ~SyncableService();
 };
 
+}  // namespace csync
+
 #endif  // SYNC_API_SYNCABLE_SERVICE_H_