Cleanup: Remove NOTIFICATION_EXTENSION_UNLOADED usage in MediaScanManager.

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

 // 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 implementation.
 
 #include "chrome/browser/extensions/api/media_galleries_private/gallery_watch_state_tracker.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 173 matching lines @@
     MediaGalleryPrefId gallery_id) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   if (!ContainsKey(watched_extensions_map_, extension_id))
     return;
   watched_extensions_map_[extension_id].erase(gallery_id);
   if (watched_extensions_map_[extension_id].empty())
     watched_extensions_map_.erase(extension_id);
   WriteToStorage(extension_id);
 }
 
-void GalleryWatchStateTracker::OnExtensionLoaded(const Extension* extension) {
+void GalleryWatchStateTracker::OnExtensionLoaded(
+    content::BrowserContext* browser_context,
+    const Extension* extension) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   StateStore* storage = ExtensionSystem::Get(profile_)->state_store();
   if (!storage)
     return;
   storage->GetExtensionValue(
       extension->id(),
       kRegisteredGalleryWatchers,
       base::Bind(&GalleryWatchStateTracker::ReadFromStorage,
                  AsWeakPtr(),
                  extension->id()));
 }
 
 void GalleryWatchStateTracker::OnExtensionUnloaded(
+    content::BrowserContext* browser_context,
     const Extension* extension) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   if (!ContainsKey(watched_extensions_map_, extension->id()))
     return;
   content::BrowserThread::PostTask(
       content::BrowserThread::FILE, FROM_HERE,
       base::Bind(&GalleryWatchManager::OnExtensionUnloaded,
                  profile_,
                  extension->id()));
   for (WatchedGalleriesMap::iterator iter =
@@ skipping 110 matching lines @@
     const std::string& extension_id,
     MediaGalleryPrefId gallery_id) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   if (HasGalleryWatchInfo(extension_id, gallery_id, true))
     return false;
   watched_extensions_map_[extension_id][gallery_id] = true;
   return true;
 }
 
 }  // namespace extensions