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

chrome/browser/download/chrome_download_manager_delegate.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 "chrome/browser/download/chrome_download_manager_delegate.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 709 matching lines @@
         IsOpenInBrowserPreferreredForFile(target_info->target_path) &&
         target_info->is_filetype_handled_safely)
       DownloadItemModel(item).SetShouldPreferOpeningInBrowser(true);
 
     if (target_info->is_dangerous_file)
       DownloadItemModel(item).SetIsDangerousFileBasedOnType(true);
   }
   callback.Run(target_info->target_path,
                target_info->target_disposition,
                target_info->danger_type,
-               target_info->intermediate_path);
+               target_info->intermediate_path,
+               target_info->hide_file_extension);
 }
 
 bool ChromeDownloadManagerDelegate::IsOpenInBrowserPreferreredForFile(
     const base::FilePath& path) {
 #if defined(OS_WIN) || defined(OS_LINUX) || \
     (defined(OS_MACOSX) && !defined(OS_IOS))
   if (path.MatchesExtension(FILE_PATH_LITERAL(".pdf"))) {
     return !download_prefs_->ShouldOpenPdfInSystemReader();
   }
 #endif
@@ skipping 12 matching lines @@
       path.MatchesExtension(FILE_PATH_LITERAL(".xht")) ||
       path.MatchesExtension(FILE_PATH_LITERAL(".xhtm")) ||
       path.MatchesExtension(FILE_PATH_LITERAL(".xhtml")) ||
       path.MatchesExtension(FILE_PATH_LITERAL(".xsl")) ||
       path.MatchesExtension(FILE_PATH_LITERAL(".xslt"))) {
     return true;
   }
 #endif
   return false;
 }