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

chrome/browser/resources/md_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()
+ * MdDownloadsDOMHandler::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;