| Index: components/sync/base/extensions_activity.h | 
| diff --git a/components/sync/base/extensions_activity.h b/components/sync/base/extensions_activity.h | 
| index 1d3c8848b1c9c3d937ff4d0878f26f9dfa57a598..fa16bab0a6f4e7e4d2e84b156d5890c1781eccde 100644 | 
| --- a/components/sync/base/extensions_activity.h | 
| +++ b/components/sync/base/extensions_activity.h | 
| @@ -35,7 +35,7 @@ class ExtensionsActivity | 
| uint32_t bookmark_write_count; | 
| }; | 
|  | 
| -  typedef std::map<std::string, Record> Records; | 
| +  using Records = std::map<std::string, Record>; | 
|  | 
| ExtensionsActivity(); | 
|  | 
|  |