Enable "Hide Extension" option when "Save Link As" on the Mac

chrome/browser/download/download_target_determiner.h

 // Copyright 2013 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_DETERMINER_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_TARGET_DETERMINER_H_
 
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 166 matching lines @@
   // Callback invoked after the delegate aquires a path reservation.
   void ReserveVirtualPathDone(const base::FilePath& path, bool verified);
 
   // Presents a file picker to the user if necessary.
   // Next state:
   // - STATE_DETERMINE_LOCAL_PATH.
   Result DoPromptUserForDownloadPath();
 
   // Callback invoked after the file picker completes. Cancels the download if
   // the user cancels the file picker.
-  void PromptUserForDownloadPathDone(const base::FilePath& virtual_path);
+  void PromptUserForDownloadPathDone(const base::FilePath& virtual_path,
+                                     bool hide_file_extension);
 
   // Up until this point, the path that was used is considered to be a virtual
   // path. This step determines the local file system path corresponding to this
   // virtual path. The translation is done by invoking the DetermineLocalPath()
   // method on the delegate.
   // Next state:
   // - STATE_DETERMINE_MIME_TYPE.
   Result DoDetermineLocalPath();
 
   // Callback invoked when the delegate has determined local path.
@@ skipping 105 matching lines @@
   bool should_notify_extensions_;
   bool create_target_directory_;
   DownloadPathReservationTracker::FilenameConflictAction conflict_action_;
   content::DownloadDangerType danger_type_;
   bool is_dangerous_file_;  // See DownloadTargetInfo::is_dangerous_file
   base::FilePath virtual_path_;
   base::FilePath local_path_;
   base::FilePath intermediate_path_;
   std::string mime_type_;
   bool is_filetype_handled_safely_;
+  bool hide_file_extension_;
 
   content::DownloadItem* download_;
   const bool is_resumption_;
   DownloadPrefs* download_prefs_;
   DownloadTargetDeterminerDelegate* delegate_;
   CompletionCallback completion_callback_;
   base::CancelableTaskTracker history_tracker_;
 
   base::WeakPtrFactory<DownloadTargetDeterminer> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadTargetDeterminer);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_TARGET_DETERMINER_H_