| Index: chrome/browser/history/in_memory_history_backend.h
 | 
| diff --git a/chrome/browser/history/in_memory_history_backend.h b/chrome/browser/history/in_memory_history_backend.h
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| index d360995eab63b281324b068cb6e54061400629a1..f06c3f6f4220e0726f7015ecbdb782e58a3dda45 100644
 | 
| --- a/chrome/browser/history/in_memory_history_backend.h
 | 
| +++ b/chrome/browser/history/in_memory_history_backend.h
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| @@ -25,6 +25,7 @@
 | 
|  #include "base/basictypes.h"
 | 
|  #include "base/gtest_prod_util.h"
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|  #include "base/memory/scoped_ptr.h"
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| +#include "base/scoped_observer.h"
 | 
|  #include "components/history/core/browser/history_service_observer.h"
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|  #include "components/history/core/browser/keyword_id.h"
 | 
|  #include "content/public/browser/notification_observer.h"
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| @@ -109,6 +110,8 @@ class InMemoryHistoryBackend : public HistoryServiceObserver,
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|    // The profile that this object is attached. May be NULL before
 | 
|    // initialization.
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|    Profile* profile_;
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| +  ScopedObserver<HistoryService, HistoryServiceObserver>
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| +      history_service_observer_;
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|    HistoryService* history_service_;
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|  
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|    DISALLOW_COPY_AND_ASSIGN(InMemoryHistoryBackend);
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| 
 |