Cleanup: Remove NOTIFICATION_EXTENSION_UNLOADED usage in MediaScanManager.

chrome/browser/extensions/api/media_galleries_private/gallery_watch_state_tracker.h

 // Copyright (c) 2012 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.
 
 // GalleryWatchStateTracker tracks the gallery watchers, updates the
 // extension state storage and observes the extension registry events.
 // GalleryWatchStateTracker lives on the UI thread.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_MEDIA_GALLERIES_PRIVATE_GALLERY_WATCH_STATE_TRACKER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_MEDIA_GALLERIES_PRIVATE_GALLERY_WATCH_STATE_TRACKER_H_
@@ skipping 72 matching lines @@
   // Value: True if the watcher is active. Watcher will be active only if
   // the extension has access permission to the watched gallery and a watcher
   // has been successfully setup.
   typedef std::map<MediaGalleryPrefId, bool> WatchedGalleriesMap;
 
   // Key: Extension identifier.
   // Value: Map of watched gallery information.
   typedef std::map<std::string, WatchedGalleriesMap> WatchedExtensionsMap;
 
   // extensions::ExtensionRegistryObserver implementation.
-  virtual void OnExtensionLoaded(const Extension* extension) OVERRIDE;
-  virtual void OnExtensionUnloaded(const Extension* extension) OVERRIDE;
+  virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
+                                 const Extension* extension) OVERRIDE;
+  virtual void OnExtensionUnloaded(content::BrowserContext* browser_context,
+                                   const Extension* extension) OVERRIDE;
 
   // Syncs media gallery watch data for the given extension to/from the state
   // storage.
   void WriteToStorage(const std::string& extension_id);
   void ReadFromStorage(const std::string& extension_id,
                        scoped_ptr<base::Value> value);
 
   // Sets up the gallery watcher on the receipt of granted gallery permission
   // event.
   void SetupGalleryWatch(const std::string& extension_id,
@@ skipping 34 matching lines @@
 
   // A map of watched gallery details, per extension.
   WatchedExtensionsMap watched_extensions_map_;
 
   DISALLOW_COPY_AND_ASSIGN(GalleryWatchStateTracker);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_MEDIA_GALLERIES_PRIVATE_GALLERY_WATCH_STATE_TRACKER_H_