| Index: components/sync/js/js_event_details.h
 | 
| diff --git a/components/sync/js/js_event_details.h b/components/sync/js/js_event_details.h
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| index 91e6460c70a3b8ea4852617d16f1e11cdb27792a..9b13ce2828141ebd7824d91751a8d1c125eb8649 100644
 | 
| --- a/components/sync/js/js_event_details.h
 | 
| +++ b/components/sync/js/js_event_details.h
 | 
| @@ -35,9 +35,9 @@ class JsEventDetails {
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|    // Copy constructor and assignment operator welcome.
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|  
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|   private:
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| -  typedef Immutable<base::DictionaryValue,
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| -                    HasSwapMemFnByPtr<base::DictionaryValue>>
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| -      ImmutableDictionaryValue;
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| +  using ImmutableDictionaryValue =
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| +      Immutable<base::DictionaryValue,
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| +                HasSwapMemFnByPtr<base::DictionaryValue>>;
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|  
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|    ImmutableDictionaryValue details_;
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|  };
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| 
 |