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

sync/api/sync_error.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_SYNC_ERROR_H_
 #define SYNC_API_SYNC_ERROR_H_
 #pragma once
 
 #include <iosfwd>
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "sync/internal_api/public/syncable/model_type.h"
 
 namespace tracked_objects {
 class Location;
 }  // namespace tracked_objects
 
+namespace csync {
+
 // Sync errors are used for debug purposes and handled internally and/or
 // exposed through Chrome's "about:sync" internal page. They are considered
 // unrecoverable for the datatype creating them, and should only be used as
 // such.
 // This class is copy-friendly and thread-safe.
 class SyncError {
  public:
   // Default constructor refers to "no error", and IsSet() will return false.
   SyncError();
 
@@ skipping 46 matching lines @@
 
   // scoped_ptr is necessary because Location objects aren't assignable.
   scoped_ptr<tracked_objects::Location> location_;
   std::string message_;
   syncable::ModelType type_;
 };
 
 // gmock printer helper.
 void PrintTo(const SyncError& sync_error, std::ostream* os);
 
+}  // namespace csync
+
 #endif  // SYNC_API_SYNC_ERROR_H_