Remove old downloads UI; Material Design version is now the default.

chrome/browser/resources/downloads/externs.js

-// Copyright 2015 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.
-
-/**
- * @fileoverview Externs for objects sent from C++ to JS for chrome://downloads.
- * @externs
- */
-
-var downloads = {};
-
-/**
- * The type of the download object. The definition is based on
- * chrome/browser/ui/webui/downloads_dom_handler.cc:CreateDownloadItemValue()
- * @typedef {{by_ext_id: string,
- *            by_ext_name: string,
- *            danger_type: string,
- *            date_string: string,
- *            file_externally_removed: boolean,
- *            file_name: string,
- *            file_path: string,
- *            file_url: string,
- *            id: string,
- *            last_reason_text: string,
- *            otr: boolean,
- *            percent: number,
- *            progress_status_text: string,
- *            resume: boolean,
- *            retry: boolean,
- *            since_string: string,
- *            started: number,
- *            state: string,
- *            total: number,
- *            url: string}}
- */
-downloads.Data;