| Index: chrome/browser/extensions/api/preference/preference_api.cc | 
| =================================================================== | 
| --- chrome/browser/extensions/api/preference/preference_api.cc	(revision 165014) | 
| +++ chrome/browser/extensions/api/preference/preference_api.cc	(working copy) | 
| @@ -257,13 +257,9 @@ | 
| int type, | 
| const content::NotificationSource& source, | 
| const content::NotificationDetails& details) { | 
| -  if (type == chrome::NOTIFICATION_PREF_CHANGED) { | 
| -    const std::string* pref_key = | 
| -        content::Details<const std::string>(details).ptr(); | 
| -    OnPrefChanged(content::Source<PrefService>(source).ptr(), *pref_key); | 
| -  } else { | 
| -    NOTREACHED(); | 
| -  } | 
| +  DCHECK_EQ(chrome::NOTIFICATION_PREF_CHANGED, type); | 
| +  OnPrefChanged(content::Source<PrefService>(source).ptr(), | 
| +                *content::Details<const std::string>(details).ptr()); | 
| } | 
|  | 
| void PreferenceEventRouter::OnPrefChanged(PrefService* pref_service, | 
|  |