Summary: Currently we have this: - DiffusionController (abstract, has some random shared browse code) - DiffusionBrowseController (concrete, Handles routing, directories, and search) - DiffusionBrowseFileController (concrete, handles files) Instead, do this: - DiffusionController (no browse-related code) - DiffusionBrowseController (abstract, shared browse code) - DiffusionBrowseMainController (concrete, handles routing) - DiffusionBrowseDirectoryController (concrete, handles directories) - DiffusionBrowseFileController (concrete, handles files) - DiffusionBrowseSearchController (concrete, handles search) Feels a lot cleaner. Test Plan: Looked at directories, searches, and files. Reviewers: btrahan Reviewed By: btrahan CC: aran Differential Revision: https://secure.phabricator.com/D7045