[Downloads] Consolidate MOTW annotation APIs into a single API.

content/browser/download/file_metadata_mac.h

-// 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.
-
-#ifndef CONTENT_BROWSER_DOWNLOAD_FILE_METADATA_MAC_H_
-#define CONTENT_BROWSER_DOWNLOAD_FILE_METADATA_MAC_H_
-
-class GURL;
-
-namespace base {
-class FilePath;
-}
-
-namespace content {
-
-// Adds origin metadata to the file.
-// |source| should be the source URL for the download, and |referrer| should be
-// the URL the user initiated the download from.
-void AddOriginMetadataToFile(const base::FilePath& file, const GURL& source,
-                             const GURL& referrer);
-
-// Adds quarantine metadata to the file, assuming it has already been
-// quarantined by the OS.
-// |source| should be the source URL for the download, and |referrer| should be
-// the URL the user initiated the download from.
-void AddQuarantineMetadataToFile(const base::FilePath& file, const GURL& source,
-                                 const GURL& referrer);
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_DOWNLOAD_FILE_METADATA_MAC_H_