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

content/browser/download/file_metadata_linux.cc

-// 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.
-
-#include "content/browser/download/file_metadata_linux.h"
-
-#include <stddef.h>
-#include <sys/types.h>
-#include <sys/xattr.h>
-
-#include "base/files/file_path.h"
-#include "base/files/file_util.h"
-#include "base/logging.h"
-#include "url/gurl.h"
-
-namespace content {
-
-const char kSourceURLAttrName[] = "user.xdg.origin.url";
-const char kReferrerURLAttrName[] = "user.xdg.referrer.url";
-
-static void SetExtendedFileAttribute(const char* path, const char* name,
-                                     const char* value, size_t value_size,
-                                     int flags) {
-  int result = setxattr(path, name, value, value_size, flags);
-  if (result) {
-    DPLOG(ERROR)
-        << "Could not set extended attribute " << name << " on file " << path;
-  }
-}
-
-void AddOriginMetadataToFile(const base::FilePath& file, const GURL& source,
-                             const GURL& referrer) {
-  DCHECK(base::PathIsWritable(file));
-  if (source.is_valid()) {
-    SetExtendedFileAttribute(file.value().c_str(), kSourceURLAttrName,
-        source.spec().c_str(), source.spec().length(), 0);
-  }
-  if (referrer.is_valid()) {
-    SetExtendedFileAttribute(file.value().c_str(), kReferrerURLAttrName,
-        referrer.spec().c_str(), referrer.spec().length(), 0);
-  }
-}
-
-}  // namespace content