Media Galleries Maintainence: Eliminate some todos

chrome/browser/media_galleries/media_galleries_preferences.cc

Index: chrome/browser/media_galleries/media_galleries_preferences.cc
diff --git a/chrome/browser/media_galleries/media_galleries_preferences.cc b/chrome/browser/media_galleries/media_galleries_preferences.cc
index 2c14b1f8e73ac0175fb267b611ea71c83cfac838..13679e77a4a2acf59b309e74fea14fa7da3d46a1 100644
--- a/chrome/browser/media_galleries/media_galleries_preferences.cc
+++ b/chrome/browser/media_galleries/media_galleries_preferences.cc
@@ -835,6 +835,9 @@ base::FilePath MediaGalleriesPreferences::LookUpGalleryPathForExtension(
       known_galleries_.find(gallery_id);
   if (it == known_galleries_.end())
     return base::FilePath();
+
+  // This seems wrong: it just returns the absolute path to the device, which
+  // is not necessarily the gallery path.
   return MediaStorageUtil::FindDevicePathById(it->second.device_id);
 }