[Sync] Rename csync namespace to syncer

sync/internal_api/public/util/unrecoverable_error_info.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_UTIL_UNRECOVERABLE_ERROR_INFO_H_
 #define SYNC_UTIL_UNRECOVERABLE_ERROR_INFO_H_
 // TODO(lipalani): Figure out the right location for this class so it is
 // accessible outside of sync engine as well.
 #pragma once
 
 #include <string>
 
 #include "base/location.h"
 
-namespace csync {
+namespace syncer {
 
 class UnrecoverableErrorInfo {
  public:
   UnrecoverableErrorInfo();
   UnrecoverableErrorInfo(
     const tracked_objects::Location& location,
     const std::string& message);
   ~UnrecoverableErrorInfo();
 
   void Reset(const tracked_objects::Location& location,
              const std::string& message);
 
   bool IsSet() const;
 
   const tracked_objects::Location& location() const;
   const std::string& message() const;
 
  private:
   tracked_objects::Location location_;
   std::string message_;
   bool is_set_;
 };
 
-}  // namespace csync
+}  // namespace syncer
 
 #endif  // SYNC_UTIL_UNRECOVERABLE_ERROR_INFO_H_