struct UnloadedExtensionInfo -> enum UnloadedExtensionInfoReason

extensions/browser/app_window/app_window_geometry_cache.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_BROWSER_APP_WINDOW_APP_WINDOW_GEOMETRY_CACHE_H_
 #define EXTENSIONS_BROWSER_APP_WINDOW_APP_WINDOW_GEOMETRY_CACHE_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 109 matching lines @@
   };
 
   // Data stored for each extension.
   typedef std::map<std::string, WindowData> ExtensionData;
 
   // ExtensionRegistryObserver implementation.
   void OnExtensionLoaded(content::BrowserContext* browser_context,
                          const Extension* extension) override;
   void OnExtensionUnloaded(content::BrowserContext* browser_context,
                            const Extension* extension,
-                           UnloadedExtensionInfo::Reason reason) override;
+                           UnloadedExtensionReason reason) override;
 
   void LoadGeometryFromStorage(const std::string& extension_id);
   void SyncToStorage();
 
   // Preferences storage.
   ExtensionPrefs* prefs_;
 
   // Cached data.
   std::map<std::string, ExtensionData> cache_;
 
   // Data that still needs saving.
   std::set<std::string> unsynced_extensions_;
 
   // The timer used to save the data.
   base::OneShotTimer sync_timer_;
 
   // The timeout value we'll use for |sync_timer_|.
   base::TimeDelta sync_delay_;
 
   // Listen to extension load, unloaded notifications.
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
   base::ObserverList<Observer> observers_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_APP_WINDOW_APP_WINDOW_GEOMETRY_CACHE_H_