| Index: components/invalidation/impl/unacked_invalidation_set.h
 | 
| diff --git a/components/invalidation/impl/unacked_invalidation_set.h b/components/invalidation/impl/unacked_invalidation_set.h
 | 
| index 62ab0b2efc408f9491bb9c58039b76789536b776..59a2c438b0dff735c01cd840b2753ac838742146 100644
 | 
| --- a/components/invalidation/impl/unacked_invalidation_set.h
 | 
| +++ b/components/invalidation/impl/unacked_invalidation_set.h
 | 
| @@ -5,6 +5,8 @@
 | 
|  #ifndef COMPONENTS_INVALIDATION_IMPL_UNACKED_INVALIDATION_SET_H_
 | 
|  #define COMPONENTS_INVALIDATION_IMPL_UNACKED_INVALIDATION_SET_H_
 | 
|  
 | 
| +#include <stddef.h>
 | 
| +
 | 
|  #include <set>
 | 
|  
 | 
|  #include "base/memory/weak_ptr.h"
 | 
| 
 |