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

content/browser/download/download_item_impl_delegate.h

 // 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.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_DELEGATE_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_DELEGATE_H_
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/download_danger_type.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/download_url_parameters.h"
 
 namespace content {
 class DownloadItemImpl;
 class BrowserContext;
 
 // Delegate for operations that a DownloadItemImpl can't do for itself.
 // The base implementation of this class does nothing (returning false
 // on predicates) so interfaces not of interest to a derived class may
 // be left unimplemented.
 class CONTENT_EXPORT DownloadItemImplDelegate {
  public:
   typedef base::Callback<void(
       const base::FilePath&,            // Target path
       DownloadItem::TargetDisposition,  // overwrite/uniquify target
       DownloadDangerType,
-      const base::FilePath&             // Intermediate file path
-                              )> DownloadTargetCallback;
+      const base::FilePath&,             // Intermediate file path
+      bool hide_file_extension     )> DownloadTargetCallback;
 
   // The boolean argument indicates whether or not the download was
   // actually opened.
   typedef base::Callback<void(bool)> ShouldOpenDownloadCallback;
 
   DownloadItemImplDelegate();
   virtual ~DownloadItemImplDelegate();
 
   // Used for catching use-after-free errors.
   void Attach();
@@ skipping 52 matching lines @@
  private:
   // For "Outlives attached DownloadItemImpl" invariant assertion.
   int count_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemImplDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_DELEGATE_H_