Convert //sync from scoped_ptr to std::unique_ptr

sync/api/sync_error.h

 // Copyright 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_
 
 #include <iosfwd>
+#include <memory>
 #include <string>
 
-#include "base/memory/scoped_ptr.h"
 #include "sync/base/sync_export.h"
 #include "sync/internal_api/public/base/model_type.h"
 
 namespace tracked_objects {
 class Location;
 }  // namespace tracked_objects
 
 namespace syncer {
 
 // Sync errors are used for debug purposes and handled internally and/or
@@ skipping 86 matching lines @@
   // is called, IsSet() will return true.
   void Init(const tracked_objects::Location& location,
             const std::string& message,
             ModelType model_type,
             ErrorType error_type);
 
   // Reset the error to it's default (unset) values.
   void Clear();
 
   // scoped_ptr is necessary because Location objects aren't assignable.
-  scoped_ptr<tracked_objects::Location> location_;
+  std::unique_ptr<tracked_objects::Location> location_;
   std::string message_;
   ModelType model_type_;
   ErrorType error_type_;
 };
 
 // gmock printer helper.
 SYNC_EXPORT void PrintTo(const SyncError& sync_error, std::ostream* os);
 
 }  // namespace syncer
 
 #endif  // SYNC_API_SYNC_ERROR_H_