Speculative fix for Mac quarantine crash

chrome/browser/download/download_file.h

 // Copyright (c) 2006-2008 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.
 //
 // Objects that handle file operations for downloads, on the download thread.
 //
 // The DownloadFileManager owns a set of DownloadFile objects, each of which
 // represent one in progress download and performs the disk IO for that
 // download. The DownloadFileManager itself is a singleton object owned by the
 // ResourceDispatcherHost.
@@ skipping 81 matching lines @@
 
   // Write a new chunk of data to the file. Returns true on success.
   bool AppendDataToFile(const char* data, int data_len);
 
   // Abort the download and automatically close the file.
   void Cancel();
 
   // Rename the download file. Returns 'true' if the rename was successful.
   bool Rename(const FilePath& full_path);
 
+  // Informs the OS that this file came from the internet.
+  void AnnotateWithSourceInformation();
+
   // Accessors.
   int64 bytes_so_far() const { return bytes_so_far_; }
   int id() const { return id_; }
   FilePath full_path() const { return full_path_; }
   int child_id() const { return child_id_; }
   int render_view_id() const { return render_view_id_; }
   int request_id() const { return request_id_; }
   bool path_renamed() const { return path_renamed_; }
   bool in_progress() const { return file_ != NULL; }
   void set_in_progress(bool in_progress) { in_progress_ = in_progress; }
@@ skipping 169 matching lines @@
   // Used for progress updates on the UI thread, mapping download->id() to bytes
   // received so far. Written to by the file thread and read by the UI thread.
   typedef base::hash_map<int, int64> ProgressMap;
   ProgressMap ui_progress_;
   Lock progress_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileManager);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_H_