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

chrome/browser/download/download_target_determiner_delegate.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_DELEGATE_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_TARGET_DETERMINER_DELEGATE_H_
 
 #include "base/callback_forward.h"
 
 #include "chrome/browser/download/download_path_reservation_tracker.h"
@@ skipping 29 matching lines @@
   // |reserved_path| should contain the reserved path. Otherwise, |successful|
   // should be false. In the failure case, |reserved_path| is ignored.
   typedef base::Callback<void(const base::FilePath& reserved_path,
                               bool successful)> ReservedPathCallback;
 
   // Callback to be invoked when PromptUserForDownloadPath() completes.
   // |virtual_path|: The path chosen by the user. If the user cancels the file
   //    selection, then this parameter will be the empty path. On Chrome OS,
   //    this path may contain virtual mount points if the user chose a virtual
   //    path (e.g. Google Drive).
-  typedef base::Callback<void(const base::FilePath& virtual_path)>
-  FileSelectedCallback;
+  typedef base::Callback<void(const base::FilePath& virtual_path,
+      bool hide_file_extension)> FileSelectedCallback;
 
   // Callback to be invoked when DetermineLocalPath() completes. The argument
   // should be the determined local path. It should be non-empty on success. If
   // |virtual_path| is already a local path, then |virtual_path| should be
   // returned as-is.
   typedef base::Callback<void(const base::FilePath&)> LocalPathCallback;
 
   // Callback to be invoked after CheckDownloadUrl() completes. The parameter to
   // the callback should indicate the danger type of the download based on the
   // results of the URL check.
@@ skipping 54 matching lines @@
                                 const CheckDownloadUrlCallback& callback) = 0;
 
   // Get the MIME type for the given file.
   virtual void GetFileMimeType(const base::FilePath& path,
                                const GetFileMimeTypeCallback& callback) = 0;
  protected:
   virtual ~DownloadTargetDeterminerDelegate();
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_TARGET_DETERMINER_DELEGATE_H_