[downloads] Move platform specific code out of DownloadTargetDeterminer.

chrome/browser/download/download_target_result.h

+// Copyright 2016 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 CHROME_BROWSER_DOWNLOAD_DOWNLOAD_TARGET_RESULT_H_
+#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_TARGET_RESULT_H_
+
+enum class DownloadTargetResult {
+  // Successfully reserved the path. If there were conflicts, they were
+  // resolved by uniquifying the path. The returned path is writeable and
+  // unique (at least when last observed). No further user interaction is
+  // required.
+  SUCCESS,
+
+  // Cancelled by user.
+  USER_CANCELED,
+
+  // Unexpected error.
+  UNEXPECTED,
+
+  // The suggested name was too long and could not be truncated to fit within
+  // the limits of the target file system. The returned path may not be valid
+  // for use on the filesystem.
+  NAME_TOO_LONG,
+
+  // There were unresolved conflicts with existing files or files that are in
+  // the process of being downloaded to the target path. The returned path
+  // should not be considered to be unique.
+  CONFLICT,
+
+  // The suggested download path was not writeable. A possibly writeable
+  // alternate path will be returned. The returned path may be empty if no
+  // suitable alternate was found.
+  PATH_NOT_WRITEABLE

[svaldez, 2016/10/28 17:29:36]

*writable

[asanka, 2016/11/07 19:50:15]

Done. Apparently "writable" is much more common in Chromium code than
"writeable" both of which are correct spelling.

+};
+
+#endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_TARGET_RESULT_H_